Numbers Manipulation challenge

Clash Royale CLAN TAG#URR8PPP

up vote
2
down vote

favorite

1

Use any programming language to generate two random digits between 1 and 9 (including both). Then your program should display:

- in the first line: the first random digit,

- in the second line: the second random digit,

- in the third line: a number whose tens and units digits are the first and second random digits respectively,

- in the fourth line: the number from the third line raised to the power of 2.

For example, if digits "9" and "2" were generated, your program should display exactly:

9

2

92

8464

code-golf random

share|improve this question

edited 3 hours ago

l4m2

4,1131432

asked 4 hours ago

Monolica

284113

• 
  
  
  

  
  8
  

  
  
  
  
  
  

  
  Can we output an array?
  – Quintec
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Can we sample without replacement, ie exclude 1,1 2,2 3,3... from the pairs?
  – JayCe
  1 hour ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

favorite

1

Use any programming language to generate two random digits between 1 and 9 (including both). Then your program should display:

- in the first line: the first random digit,

- in the second line: the second random digit,

- in the third line: a number whose tens and units digits are the first and second random digits respectively,

- in the fourth line: the number from the third line raised to the power of 2.

For example, if digits "9" and "2" were generated, your program should display exactly:

9

2

92

8464

code-golf random

share|improve this question

edited 3 hours ago

l4m2

4,1131432

asked 4 hours ago

Monolica

284113

• 
  
  
  

  
  8
  

  
  
  
  
  
  

  
  Can we output an array?
  – Quintec
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Can we sample without replacement, ie exclude 1,1 2,2 3,3... from the pairs?
  – JayCe
  1 hour ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

favorite

1

up vote
2
down vote

favorite

1

1

Use any programming language to generate two random digits between 1 and 9 (including both). Then your program should display:

- in the first line: the first random digit,

- in the second line: the second random digit,

- in the third line: a number whose tens and units digits are the first and second random digits respectively,

- in the fourth line: the number from the third line raised to the power of 2.

For example, if digits "9" and "2" were generated, your program should display exactly:

9

2

92

8464

code-golf random

share|improve this question

edited 3 hours ago

l4m2

4,1131432

asked 4 hours ago

Monolica

284113

Use any programming language to generate two random digits between 1 and 9 (including both). Then your program should display:

- in the first line: the first random digit,

- in the second line: the second random digit,

- in the third line: a number whose tens and units digits are the first and second random digits respectively,

- in the fourth line: the number from the third line raised to the power of 2.

For example, if digits "9" and "2" were generated, your program should display exactly:

9

2

92

8464

code-golf random

code-golf random

share|improve this question

edited 3 hours ago

l4m2

4,1131432

asked 4 hours ago

Monolica

284113

share|improve this question

edited 3 hours ago

l4m2

4,1131432

asked 4 hours ago

Monolica

284113

share|improve this question

share|improve this question

edited 3 hours ago

l4m2

4,1131432

edited 3 hours ago

l4m2

4,1131432

edited 3 hours ago

l4m2

4,1131432

4,1131432

asked 4 hours ago

Monolica

284113

asked 4 hours ago

Monolica

284113

asked 4 hours ago

Monolica

284113

284113

• 
  
  
  

  
  8
  

  
  
  
  
  
  

  
  Can we output an array?
  – Quintec
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Can we sample without replacement, ie exclude 1,1 2,2 3,3... from the pairs?
  – JayCe
  1 hour ago
  
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  8
  

  
  
  
  
  
  

  
  Can we output an array?
  – Quintec
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Can we sample without replacement, ie exclude 1,1 2,2 3,3... from the pairs?
  – JayCe
  1 hour ago
  
  

  
  
  
  

8

8

Can we output an array?
– Quintec
3 hours ago

Can we output an array?
– Quintec
3 hours ago

1

1

Can we sample without replacement, ie exclude 1,1 2,2 3,3... from the pairs?
– JayCe
1 hour ago

Can we sample without replacement, ie exclude 1,1 2,2 3,3... from the pairs?
– JayCe
1 hour ago

add a comment | 

19 Answers
19

active

oldest

votes

up vote
3
down vote

C (gcc), 68 67 bytes

-1 byte thanks to cleblanc

f(r)r=rand()%81*10/9+11;printf("%dn%dn%dn%d",r/10,r%10,r,r*r);

Try it online!

share|improve this answer

edited 2 hours ago

answered 2 hours ago

nwellnhof

5,098920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  save one byte using r;f() --> f(r)
  – cleblanc
  2 hours ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

Python 3, 83 bytes

from random import*
a,b=map(randint,(1,1),(9,9))
k=a*10+b
[*map(print,[a,b,k,k*k])]

Try it online!

share|improve this answer

answered 3 hours ago

ovs

18k21058

• 
  
  
  

  
  

  
  
  
  
  
  

  
  82 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  76 bytes
  – nwellnhof
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

Perl 6, 39 bytes

.comb,$_,$_²([~] roll 1..9: 2)>>.put

Try it online!

share|improve this answer

edited 3 hours ago

answered 3 hours ago

nwellnhof

5,098920

add a comment | 

up vote
2
down vote

R, 48 bytes

cat(x<-sample(9,2,T),y<-x%*%c(10,1),y^2,sep="
")

Try it online!

share|improve this answer

answered 3 hours ago

Giuseppe

15.6k31051

add a comment | 

up vote
2
down vote

PowerShell, 48 bytes

($a,$b=1..9+1..9|Random -c 2)
($x="$a$b")
+$x*$x

Try it online!

Concatenates two ranges 1..9 together, pipes that to Get-Random with a -count of 2 to pull out two elements, stores them into $a and $b, and encapsulates that in parens to place a copy of them on the pipeline.

Next we string concatenate $a$b and store it into $x, again placing in parens to put a copy on the pipeline. Finally we take $x squared and leave it on the pipeline.

All the results are gathered from the pipeline and an implicit Write-Output gives us newlines between elements for free.

share|improve this answer

answered 2 hours ago

AdmBorkBork

25.2k361219

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Smart get-random
  – mazzy
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

Pyth, 14 bytes

^
i,
hO9
hO9T2

Note that the newlines are significant. Try it online here.

Explanation, with newlines replaced with ¶ character:

^¶i,¶hO9¶hO9T2 Implicit: T=10

 O9 Choose a random number in [0-9)
 h Increment
 ¶ Output with newline - value printed is yielded as expression result
 ¶hO9 Do the above again
 , Wrap the two previous results in a two-element array
 i T Convert to decimal from base 10
 ¶ Output with newline
^ 2 Square the previous result, implicit print

share|improve this answer

answered 2 hours ago

Sok

3,219722

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Downvoter - any particular reason why?
  – Sok
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

Japt, 14 bytes

9õ ï ö
pU¬Uì ²

---

9õ ï ö
pU¬Uì ² Full program
-----------------------------------------
9õ Range [1,9] 
 ï Cartesian product with itself
 ö get a random element
 This result is assigned to U

p Push into U 
 U¬ Elements in U joined
 Uì ² and elements joined squared
 Implicit output each element 
 separated with new line -R

Try it online!

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Mq can return 0
  – Shaggy
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
  – Luis felipe De jesus Munoz
  1 hour ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

T-SQL, 142 105 115 114 96 bytes

DECLARE @ AS char=LEFT(RAND()*9+1,1),@a AS char=LEFT(RAND()*9+1,1)SELECT @,@a,@+@a,POWER(@+@a,2)

-37 bytes: Realized I could just use two different random numbers and use the first digits from each!
+10 bytes: Edited to meet requirements of range from 1-9, instead of 0-9
-1 byte: Changed RIGHT() to LEFT() in @b
-18 bytes: Various changes suggested by BradC

Ungolfed:

-- Setting RAND() separately in these produces different numbers.
-- [RAND() * b + a] sets the range for a random number, from a to b inclusive.
-- Set the variable string to the first number.
DECLARE @ AS char = LEFT(RAND() * 9 + 1, 1),
 @a AS char = LEFT(RAND() * 9 + 1, 1)

SELECT @, -- first digit
 @a, -- second digit
 @ + @a, -- first two digits combined (not added, as they are type char)
 POWER(@ + @a, 2) -- first two digits combined, squared (POWER function will cast the first argument to a number if it is a string)

share|improve this answer

edited 7 mins ago

answered 1 hour ago

Meerkat

1215

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
  – BradC
  26 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
  – BradC
  18 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
  – Meerkat
  11 mins ago
  

  
  
  
  

add a comment | 

up vote
1
down vote

JavaScript (ES6), 67 bytes

f=_=>(n=Math.random()*90+10|0)%10?(n/10|0)+`
$n%10
$n
`+n*n:f()

Try it online!

share|improve this answer

answered 3 hours ago

Arnauld

67.1k584282

add a comment | 

up vote
1
down vote

Charcoal, 16 bytes

≔⭆²⊕‽⁹θ↓θθ⸿ＩＸＩθ²

Try it online! Link is to verbose version of code. Explanation:

≔⭆²⊕‽⁹θ

Generate two random characters in the range 1 to 9.

↓θ

Output them downwards i.e. on separate lines.

θ⸿

Output them horizontally on their own line.

ＩＸＩθ²

Cast to integer, square, cast back to string for implicit print.

share|improve this answer

answered 2 hours ago

Neil

77.2k744174

add a comment | 

up vote
1
down vote

Jelly, 10 9 bytes

9ṗ2XṄ€ḌṄ²

Try it online!

How it works

9ṗ2XṄ€ḌṄ² Main link. No arguments.

9 Set the return value to 9.
 ṗ2 Promote 9 to [1, ..., 9] and take the second Cartesian power, yielding
 [[1, 1], [1, 2], ..., [9, 8], [9, 9]].
 X Pseudo-randomly select one of the pairs.
 Ṅ€ Print each integer in the pair, followed by a newline.
 Ḍ Undecimal; convert the integer pair from base 10 to an integer.
 Ṅ Print the integer, followed by a newline.
 ² Take the square.
 (implicit) Print the last return value.

share|improve this answer

edited 2 hours ago

answered 2 hours ago

Dennis♦

183k32293725

add a comment | 

up vote
1
down vote

Ruby, 41 bytes

puts [(a=11+10*rand(81)/9)/10,a%10,a,a*a]

Try it online!

share|improve this answer

answered 2 hours ago

G B

7,3371327

add a comment | 

up vote
1
down vote

Vim, 44 bytes

:%!$RANDOM

:s/0//g
2f:hy2hVpo=0*0
kYPa

Try it online!

Not the right tool for the job. This produces most likely the desired output

Step by step:

• :%!$RANDOM Enter Enter
  
  Produces a string like /bin/bash: 25266: command not found




• :s/0//g
  
  removes all zeroes




• 2f:hy2hVp
  
  moves the cursor one to the left of the colon after the number, copy the last two digits and replace the entire string with those




• o Ctrl+R = Ctrl+R 0* Ctrl+R 0 Enter
  
  add a new line and evaluate an expression. In this case, I'll multiply the number in register 0 (the one that was just copied) with itself. Result:




• Esc kYPa Enter
  
  Copy the upper line and paste it above. The cursor ends up in the first line, on the first character. Now we just have to append a line break to it

Limitations: If the result of $RANDOM is a number with less than two non-zero digits, this will not produce the desired output

share|improve this answer

edited 1 hour ago

answered 1 hour ago

oktupol

6379

add a comment | 

up vote
1
down vote

Java 8, 99 98 90 81 80 bytes

v->int i=81;i*=Math.random();return(i=i*10/9+11)/10+"n"+i%10+"n"+i+"n"+i*i;

-8 bytes after being inspired by @Arnauld's JavaScript answer.

-9 bytes thanks to @nwellnhof.

Try it online.

Explanation:

v-> // Method with empty unused parameter and no return-type
 int i=81;i*=Math.random();// Create a random integer `i` in the range [0,81)
 return(i=i*10/9+11) // Set `i` to 10 times `i`, integer-divided by 9, and 11 added
 /10+"n" // Return the first digit of `i`, a newline,
 +i%10+"n" // the last digit of `i`, a newline,
 +i+"n" // `i` itself, a newline,
 +i*i; // and `i` multiplied by itself
 // All concatted to each other

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
  – Kevin Cruijssen
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
1
down vote

05AB1E, 14 11 bytes

2F9LΩ=}J=n,

-3 bytes thanks to @Emigna.

Try it online.

Explanation:

2F } # Loop 2 times:
 9LΩ # Create a list in the range [1,9], and pick a random element from it
 = # Output it (without popping it from the stack)
 J # Join them together
 = # Output it (without popping it from the stack)
 n # Take it to the power of 2
 , # And output it as well

---

11 bytes alternative:

9LãΩ©`®JDn»

Try it online.

Explanation:

9L # List in the range [1,9]
 ã # Cartesian product with itself: [[1,1],[1,2],[1,3],...,[9,7],[9,8],[9,9]]
 Ω # Take a random element from it
 © # Store it in the register (without popping)
 ` # Pop and push both items as separated items onto the stack
 ® # Retrieve the list of digits from the register again
 J # Join them together to a single 2-digit number
 Dn # Duplicate it, and take the power of 2 of the copy
 » # Merge all values on the stack by newlines (and output implicitly)

share|improve this answer

edited 56 mins ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Shorter in a looP: 2F9LΩ=}J=n,
  – Emigna
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Emigna I was about to look for shorter alternatives, but smart use of the =!
  – Kevin Cruijssen
  3 hours ago
  
  

  
  
  
  

add a comment | 

up vote
1
down vote

Python 2, 84 75 bytes

from random import*
k=randint(9,89)*10/9+1
for x in k/10,k%10,k,k*k:print x

Try it online!

---

Saved

• -1 bytes, thanks to Erik the Outgolfer


• -8 bytes, thanks to nwellnhof

share|improve this answer

edited 45 mins ago

answered 3 hours ago

TFeld

12.8k2836

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Moderate golf: 83 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @EriktheOutgolfer Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  

add a comment | 

up vote
0
down vote

C# (.NET Core), 130 bytes

Random r=new Random();int a=r.Next(1,9),b=r.Next(1,9),c=int.Parse(a.ToString()+b.ToString());Console.Write(a+" "+b+" "+c+" "+c*c);

Try it online!

Ungolfed:

Random r = new Random(); // initializes random number generator
int a = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 b = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 c = int.Parse(a.ToString() + b.ToString()); // concatenates a and b into one two-digit number
Console.Write(a + " " + b + " " + c + " " + c*c); // writes a, b, c, and c^2 to the console

share|improve this answer

edited 46 mins ago

answered 57 mins ago

Meerkat

1215

add a comment | 

up vote
0
down vote

K (oK), 28 bytes

t:2?10;t,:10/t;$t,:t[2]*t[2]

Explanation

t:2?10 //define t as two random numbers from 1-10
 t,:10/t //join the base 10 joining of the elements of t to t
 t,:t[2]*t[2]//join the square of the index 2 element to t
 $ //String each element of the result (to output on newlines)

Try it online!

Cleaner Output, 32 bytes

t:2?10;t,:10/t;`0:$t,:t[2]*t[2];

 `0: //Cleanly prints the strings

Try it online!

share|improve this answer

edited 1 min ago

answered 29 mins ago

Thaufeki

16117

add a comment | 

up vote
0
down vote

PHP, 64 bytes

<?$d=($c=(10*($a=rand(1,9))+$b=rand(1,9)))*$c;echo"$a
$b
$c
$d";

Try it online!

share

answered 1 min ago

Jo.

98419

add a comment | 

Your Answer

StackExchange.ifUsing("editor", function ()
return StackExchange.using("mathjaxEditing", function ()
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
);
);
, "mathjax-editing");

StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "200"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

 

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name Email

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodegolf.stackexchange.com%2fquestions%2f175006%2fnumbers-manipulation-challenge%23new-answer', 'question_page');

);

Post as a guest

Name Email

19 Answers
19

active

oldest

votes

19 Answers
19

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
3
down vote

C (gcc), 68 67 bytes

-1 byte thanks to cleblanc

f(r)r=rand()%81*10/9+11;printf("%dn%dn%dn%d",r/10,r%10,r,r*r);

Try it online!

share|improve this answer

edited 2 hours ago

answered 2 hours ago

nwellnhof

5,098920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  save one byte using r;f() --> f(r)
  – cleblanc
  2 hours ago
  

  
  
  
  

add a comment | 

up vote
3
down vote

C (gcc), 68 67 bytes

-1 byte thanks to cleblanc

f(r)r=rand()%81*10/9+11;printf("%dn%dn%dn%d",r/10,r%10,r,r*r);

Try it online!

share|improve this answer

edited 2 hours ago

answered 2 hours ago

nwellnhof

5,098920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  save one byte using r;f() --> f(r)
  – cleblanc
  2 hours ago
  

  
  
  
  

add a comment | 

up vote
3
down vote

up vote
3
down vote

C (gcc), 68 67 bytes

-1 byte thanks to cleblanc

f(r)r=rand()%81*10/9+11;printf("%dn%dn%dn%d",r/10,r%10,r,r*r);

Try it online!

share|improve this answer

edited 2 hours ago

answered 2 hours ago

nwellnhof

5,098920

C (gcc), 68 67 bytes

-1 byte thanks to cleblanc

f(r)r=rand()%81*10/9+11;printf("%dn%dn%dn%d",r/10,r%10,r,r*r);

Try it online!

share|improve this answer

edited 2 hours ago

answered 2 hours ago

nwellnhof

5,098920

share|improve this answer

share|improve this answer

edited 2 hours ago

edited 2 hours ago

edited 2 hours ago

answered 2 hours ago

nwellnhof

5,098920

answered 2 hours ago

nwellnhof

5,098920

answered 2 hours ago

nwellnhof

5,098920

5,098920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  save one byte using r;f() --> f(r)
  – cleblanc
  2 hours ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  save one byte using r;f() --> f(r)
  – cleblanc
  2 hours ago
  

  
  
  
  

save one byte using r;f() --> f(r)
– cleblanc
2 hours ago

save one byte using r;f() --> f(r)
– cleblanc
2 hours ago

add a comment | 

up vote
2
down vote

Python 3, 83 bytes

from random import*
a,b=map(randint,(1,1),(9,9))
k=a*10+b
[*map(print,[a,b,k,k*k])]

Try it online!

share|improve this answer

answered 3 hours ago

ovs

18k21058

• 
  
  
  

  
  

  
  
  
  
  
  

  
  82 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  76 bytes
  – nwellnhof
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

Python 3, 83 bytes

from random import*
a,b=map(randint,(1,1),(9,9))
k=a*10+b
[*map(print,[a,b,k,k*k])]

Try it online!

share|improve this answer

answered 3 hours ago

ovs

18k21058

• 
  
  
  

  
  

  
  
  
  
  
  

  
  82 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  76 bytes
  – nwellnhof
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

up vote
2
down vote

Python 3, 83 bytes

from random import*
a,b=map(randint,(1,1),(9,9))
k=a*10+b
[*map(print,[a,b,k,k*k])]

Try it online!

share|improve this answer

answered 3 hours ago

ovs

18k21058

Python 3, 83 bytes

from random import*
a,b=map(randint,(1,1),(9,9))
k=a*10+b
[*map(print,[a,b,k,k*k])]

Try it online!

share|improve this answer

answered 3 hours ago

ovs

18k21058

share|improve this answer

share|improve this answer

answered 3 hours ago

ovs

18k21058

answered 3 hours ago

ovs

18k21058

answered 3 hours ago

ovs

18k21058

18k21058

• 
  
  
  

  
  

  
  
  
  
  
  

  
  82 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  76 bytes
  – nwellnhof
  1 hour ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  82 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  76 bytes
  – nwellnhof
  1 hour ago
  

  
  
  
  

82 bytes.
– Erik the Outgolfer
1 hour ago

82 bytes.
– Erik the Outgolfer
1 hour ago

1

1

76 bytes
– nwellnhof
1 hour ago

76 bytes
– nwellnhof
1 hour ago

add a comment | 

up vote
2
down vote

Perl 6, 39 bytes

.comb,$_,$_²([~] roll 1..9: 2)>>.put

Try it online!

share|improve this answer

edited 3 hours ago

answered 3 hours ago

nwellnhof

5,098920

add a comment | 

up vote
2
down vote

Perl 6, 39 bytes

.comb,$_,$_²([~] roll 1..9: 2)>>.put

Try it online!

share|improve this answer

edited 3 hours ago

answered 3 hours ago

nwellnhof

5,098920

add a comment | 

up vote
2
down vote

up vote
2
down vote

Perl 6, 39 bytes

.comb,$_,$_²([~] roll 1..9: 2)>>.put

Try it online!

share|improve this answer

edited 3 hours ago

answered 3 hours ago

nwellnhof

5,098920

Perl 6, 39 bytes

.comb,$_,$_²([~] roll 1..9: 2)>>.put

Try it online!

share|improve this answer

edited 3 hours ago

answered 3 hours ago

nwellnhof

5,098920

share|improve this answer

share|improve this answer

edited 3 hours ago

edited 3 hours ago

edited 3 hours ago

answered 3 hours ago

nwellnhof

5,098920

answered 3 hours ago

nwellnhof

5,098920

answered 3 hours ago

nwellnhof

5,098920

5,098920

add a comment | 

add a comment | 

up vote
2
down vote

R, 48 bytes

cat(x<-sample(9,2,T),y<-x%*%c(10,1),y^2,sep="
")

Try it online!

share|improve this answer

answered 3 hours ago

Giuseppe

15.6k31051

add a comment | 

up vote
2
down vote

R, 48 bytes

cat(x<-sample(9,2,T),y<-x%*%c(10,1),y^2,sep="
")

Try it online!

share|improve this answer

answered 3 hours ago

Giuseppe

15.6k31051

add a comment | 

up vote
2
down vote

up vote
2
down vote

R, 48 bytes

cat(x<-sample(9,2,T),y<-x%*%c(10,1),y^2,sep="
")

Try it online!

share|improve this answer

answered 3 hours ago

Giuseppe

15.6k31051

R, 48 bytes

cat(x<-sample(9,2,T),y<-x%*%c(10,1),y^2,sep="
")

Try it online!

share|improve this answer

answered 3 hours ago

Giuseppe

15.6k31051

share|improve this answer

share|improve this answer

answered 3 hours ago

Giuseppe

15.6k31051

answered 3 hours ago

Giuseppe

15.6k31051

answered 3 hours ago

Giuseppe

15.6k31051

15.6k31051

add a comment | 

add a comment | 

up vote
2
down vote

PowerShell, 48 bytes

($a,$b=1..9+1..9|Random -c 2)
($x="$a$b")
+$x*$x

Try it online!

Concatenates two ranges 1..9 together, pipes that to Get-Random with a -count of 2 to pull out two elements, stores them into $a and $b, and encapsulates that in parens to place a copy of them on the pipeline.

Next we string concatenate $a$b and store it into $x, again placing in parens to put a copy on the pipeline. Finally we take $x squared and leave it on the pipeline.

All the results are gathered from the pipeline and an implicit Write-Output gives us newlines between elements for free.

share|improve this answer

answered 2 hours ago

AdmBorkBork

25.2k361219

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Smart get-random
  – mazzy
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

PowerShell, 48 bytes

($a,$b=1..9+1..9|Random -c 2)
($x="$a$b")
+$x*$x

Try it online!

Concatenates two ranges 1..9 together, pipes that to Get-Random with a -count of 2 to pull out two elements, stores them into $a and $b, and encapsulates that in parens to place a copy of them on the pipeline.

Next we string concatenate $a$b and store it into $x, again placing in parens to put a copy on the pipeline. Finally we take $x squared and leave it on the pipeline.

All the results are gathered from the pipeline and an implicit Write-Output gives us newlines between elements for free.

share|improve this answer

answered 2 hours ago

AdmBorkBork

25.2k361219

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Smart get-random
  – mazzy
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

up vote
2
down vote

PowerShell, 48 bytes

($a,$b=1..9+1..9|Random -c 2)
($x="$a$b")
+$x*$x

Try it online!

Concatenates two ranges 1..9 together, pipes that to Get-Random with a -count of 2 to pull out two elements, stores them into $a and $b, and encapsulates that in parens to place a copy of them on the pipeline.

Next we string concatenate $a$b and store it into $x, again placing in parens to put a copy on the pipeline. Finally we take $x squared and leave it on the pipeline.

All the results are gathered from the pipeline and an implicit Write-Output gives us newlines between elements for free.

share|improve this answer

answered 2 hours ago

AdmBorkBork

25.2k361219

PowerShell, 48 bytes

($a,$b=1..9+1..9|Random -c 2)
($x="$a$b")
+$x*$x

Try it online!

Concatenates two ranges 1..9 together, pipes that to Get-Random with a -count of 2 to pull out two elements, stores them into $a and $b, and encapsulates that in parens to place a copy of them on the pipeline.

Next we string concatenate $a$b and store it into $x, again placing in parens to put a copy on the pipeline. Finally we take $x squared and leave it on the pipeline.

All the results are gathered from the pipeline and an implicit Write-Output gives us newlines between elements for free.

share|improve this answer

answered 2 hours ago

AdmBorkBork

25.2k361219

share|improve this answer

share|improve this answer

answered 2 hours ago

AdmBorkBork

25.2k361219

answered 2 hours ago

AdmBorkBork

25.2k361219

answered 2 hours ago

AdmBorkBork

25.2k361219

25.2k361219

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Smart get-random
  – mazzy
  1 hour ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Smart get-random
  – mazzy
  1 hour ago
  

  
  
  
  

Smart get-random
– mazzy
1 hour ago

Smart get-random
– mazzy
1 hour ago

add a comment | 

up vote
2
down vote

Pyth, 14 bytes

^
i,
hO9
hO9T2

Note that the newlines are significant. Try it online here.

Explanation, with newlines replaced with ¶ character:

^¶i,¶hO9¶hO9T2 Implicit: T=10

 O9 Choose a random number in [0-9)
 h Increment
 ¶ Output with newline - value printed is yielded as expression result
 ¶hO9 Do the above again
 , Wrap the two previous results in a two-element array
 i T Convert to decimal from base 10
 ¶ Output with newline
^ 2 Square the previous result, implicit print

share|improve this answer

answered 2 hours ago

Sok

3,219722

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Downvoter - any particular reason why?
  – Sok
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

Pyth, 14 bytes

^
i,
hO9
hO9T2

Note that the newlines are significant. Try it online here.

Explanation, with newlines replaced with ¶ character:

^¶i,¶hO9¶hO9T2 Implicit: T=10

 O9 Choose a random number in [0-9)
 h Increment
 ¶ Output with newline - value printed is yielded as expression result
 ¶hO9 Do the above again
 , Wrap the two previous results in a two-element array
 i T Convert to decimal from base 10
 ¶ Output with newline
^ 2 Square the previous result, implicit print

share|improve this answer

answered 2 hours ago

Sok

3,219722

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Downvoter - any particular reason why?
  – Sok
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

up vote
2
down vote

Pyth, 14 bytes

^
i,
hO9
hO9T2

Note that the newlines are significant. Try it online here.

Explanation, with newlines replaced with ¶ character:

^¶i,¶hO9¶hO9T2 Implicit: T=10

 O9 Choose a random number in [0-9)
 h Increment
 ¶ Output with newline - value printed is yielded as expression result
 ¶hO9 Do the above again
 , Wrap the two previous results in a two-element array
 i T Convert to decimal from base 10
 ¶ Output with newline
^ 2 Square the previous result, implicit print

share|improve this answer

answered 2 hours ago

Sok

3,219722

Pyth, 14 bytes

^
i,
hO9
hO9T2

Note that the newlines are significant. Try it online here.

Explanation, with newlines replaced with ¶ character:

^¶i,¶hO9¶hO9T2 Implicit: T=10

 O9 Choose a random number in [0-9)
 h Increment
 ¶ Output with newline - value printed is yielded as expression result
 ¶hO9 Do the above again
 , Wrap the two previous results in a two-element array
 i T Convert to decimal from base 10
 ¶ Output with newline
^ 2 Square the previous result, implicit print

share|improve this answer

answered 2 hours ago

Sok

3,219722

share|improve this answer

share|improve this answer

answered 2 hours ago

Sok

3,219722

answered 2 hours ago

Sok

3,219722

answered 2 hours ago

Sok

3,219722

3,219722

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Downvoter - any particular reason why?
  – Sok
  1 hour ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Downvoter - any particular reason why?
  – Sok
  1 hour ago
  

  
  
  
  

@Downvoter - any particular reason why?
– Sok
1 hour ago

@Downvoter - any particular reason why?
– Sok
1 hour ago

add a comment | 

up vote
2
down vote

Japt, 14 bytes

9õ ï ö
pU¬Uì ²

---

9õ ï ö
pU¬Uì ² Full program
-----------------------------------------
9õ Range [1,9] 
 ï Cartesian product with itself
 ö get a random element
 This result is assigned to U

p Push into U 
 U¬ Elements in U joined
 Uì ² and elements joined squared
 Implicit output each element 
 separated with new line -R

Try it online!

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Mq can return 0
  – Shaggy
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
  – Luis felipe De jesus Munoz
  1 hour ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

Japt, 14 bytes

9õ ï ö
pU¬Uì ²

---

9õ ï ö
pU¬Uì ² Full program
-----------------------------------------
9õ Range [1,9] 
 ï Cartesian product with itself
 ö get a random element
 This result is assigned to U

p Push into U 
 U¬ Elements in U joined
 Uì ² and elements joined squared
 Implicit output each element 
 separated with new line -R

Try it online!

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Mq can return 0
  – Shaggy
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
  – Luis felipe De jesus Munoz
  1 hour ago
  
  

  
  
  
  

add a comment | 

up vote
2
down vote

up vote
2
down vote

Japt, 14 bytes

9õ ï ö
pU¬Uì ²

---

9õ ï ö
pU¬Uì ² Full program
-----------------------------------------
9õ Range [1,9] 
 ï Cartesian product with itself
 ö get a random element
 This result is assigned to U

p Push into U 
 U¬ Elements in U joined
 Uì ² and elements joined squared
 Implicit output each element 
 separated with new line -R

Try it online!

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

Japt, 14 bytes

9õ ï ö
pU¬Uì ²

---

9õ ï ö
pU¬Uì ² Full program
-----------------------------------------
9õ Range [1,9] 
 ï Cartesian product with itself
 ö get a random element
 This result is assigned to U

p Push into U 
 U¬ Elements in U joined
 Uì ² and elements joined squared
 Implicit output each element 
 separated with new line -R

Try it online!

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

share|improve this answer

share|improve this answer

edited 1 hour ago

edited 1 hour ago

edited 1 hour ago

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

answered 3 hours ago

Luis felipe De jesus Munoz

3,46011049

3,46011049

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Mq can return 0
  – Shaggy
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
  – Luis felipe De jesus Munoz
  1 hour ago
  
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Mq can return 0
  – Shaggy
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
  – Luis felipe De jesus Munoz
  1 hour ago
  
  

  
  
  
  

1

1

Mq can return 0
– Shaggy
2 hours ago

Mq can return 0
– Shaggy
2 hours ago

@Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
– Luis felipe De jesus Munoz
1 hour ago

@Shaggy didn't notice that the random numbers range was [1, 9]. It should be fixed now
– Luis felipe De jesus Munoz
1 hour ago

add a comment | 

up vote
2
down vote

T-SQL, 142 105 115 114 96 bytes

DECLARE @ AS char=LEFT(RAND()*9+1,1),@a AS char=LEFT(RAND()*9+1,1)SELECT @,@a,@+@a,POWER(@+@a,2)

-37 bytes: Realized I could just use two different random numbers and use the first digits from each!
+10 bytes: Edited to meet requirements of range from 1-9, instead of 0-9
-1 byte: Changed RIGHT() to LEFT() in @b
-18 bytes: Various changes suggested by BradC

Ungolfed:

-- Setting RAND() separately in these produces different numbers.
-- [RAND() * b + a] sets the range for a random number, from a to b inclusive.
-- Set the variable string to the first number.
DECLARE @ AS char = LEFT(RAND() * 9 + 1, 1),
 @a AS char = LEFT(RAND() * 9 + 1, 1)

SELECT @, -- first digit
 @a, -- second digit
 @ + @a, -- first two digits combined (not added, as they are type char)
 POWER(@ + @a, 2) -- first two digits combined, squared (POWER function will cast the first argument to a number if it is a string)

share|improve this answer

edited 7 mins ago

answered 1 hour ago

Meerkat

1215

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
  – BradC
  26 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
  – BradC
  18 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
  – Meerkat
  11 mins ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

T-SQL, 142 105 115 114 96 bytes

DECLARE @ AS char=LEFT(RAND()*9+1,1),@a AS char=LEFT(RAND()*9+1,1)SELECT @,@a,@+@a,POWER(@+@a,2)

-37 bytes: Realized I could just use two different random numbers and use the first digits from each!
+10 bytes: Edited to meet requirements of range from 1-9, instead of 0-9
-1 byte: Changed RIGHT() to LEFT() in @b
-18 bytes: Various changes suggested by BradC

Ungolfed:

-- Setting RAND() separately in these produces different numbers.
-- [RAND() * b + a] sets the range for a random number, from a to b inclusive.
-- Set the variable string to the first number.
DECLARE @ AS char = LEFT(RAND() * 9 + 1, 1),
 @a AS char = LEFT(RAND() * 9 + 1, 1)

SELECT @, -- first digit
 @a, -- second digit
 @ + @a, -- first two digits combined (not added, as they are type char)
 POWER(@ + @a, 2) -- first two digits combined, squared (POWER function will cast the first argument to a number if it is a string)

share|improve this answer

edited 7 mins ago

answered 1 hour ago

Meerkat

1215

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
  – BradC
  26 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
  – BradC
  18 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
  – Meerkat
  11 mins ago
  

  
  
  
  

add a comment | 

up vote
2
down vote

up vote
2
down vote

T-SQL, 142 105 115 114 96 bytes

DECLARE @ AS char=LEFT(RAND()*9+1,1),@a AS char=LEFT(RAND()*9+1,1)SELECT @,@a,@+@a,POWER(@+@a,2)

-37 bytes: Realized I could just use two different random numbers and use the first digits from each!
+10 bytes: Edited to meet requirements of range from 1-9, instead of 0-9
-1 byte: Changed RIGHT() to LEFT() in @b
-18 bytes: Various changes suggested by BradC

Ungolfed:

-- Setting RAND() separately in these produces different numbers.
-- [RAND() * b + a] sets the range for a random number, from a to b inclusive.
-- Set the variable string to the first number.
DECLARE @ AS char = LEFT(RAND() * 9 + 1, 1),
 @a AS char = LEFT(RAND() * 9 + 1, 1)

SELECT @, -- first digit
 @a, -- second digit
 @ + @a, -- first two digits combined (not added, as they are type char)
 POWER(@ + @a, 2) -- first two digits combined, squared (POWER function will cast the first argument to a number if it is a string)

share|improve this answer

edited 7 mins ago

answered 1 hour ago

Meerkat

1215

T-SQL, 142 105 115 114 96 bytes

DECLARE @ AS char=LEFT(RAND()*9+1,1),@a AS char=LEFT(RAND()*9+1,1)SELECT @,@a,@+@a,POWER(@+@a,2)

-37 bytes: Realized I could just use two different random numbers and use the first digits from each!
+10 bytes: Edited to meet requirements of range from 1-9, instead of 0-9
-1 byte: Changed RIGHT() to LEFT() in @b
-18 bytes: Various changes suggested by BradC

Ungolfed:

-- Setting RAND() separately in these produces different numbers.
-- [RAND() * b + a] sets the range for a random number, from a to b inclusive.
-- Set the variable string to the first number.
DECLARE @ AS char = LEFT(RAND() * 9 + 1, 1),
 @a AS char = LEFT(RAND() * 9 + 1, 1)

SELECT @, -- first digit
 @a, -- second digit
 @ + @a, -- first two digits combined (not added, as they are type char)
 POWER(@ + @a, 2) -- first two digits combined, squared (POWER function will cast the first argument to a number if it is a string)

share|improve this answer

edited 7 mins ago

answered 1 hour ago

Meerkat

1215

share|improve this answer

share|improve this answer

edited 7 mins ago

edited 7 mins ago

edited 7 mins ago

answered 1 hour ago

Meerkat

1215

answered 1 hour ago

Meerkat

1215

answered 1 hour ago

Meerkat

1215

1215

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
  – BradC
  26 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
  – BradC
  18 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
  – Meerkat
  11 mins ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
  – BradC
  26 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
  – BradC
  18 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
  – Meerkat
  11 mins ago
  

  
  
  
  

1

1

Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
– BradC
26 mins ago

Nice work, a few ways to save more: use char instead of varchar, use @ by itself for one of the two variables (its valid!), simplify each RAND to RAND()*9+1 (which is 10-1, your code wasn't allowing for 9s).
– BradC
26 mins ago

Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
– BradC
18 mins ago

Ooo, you'd have to change your SELECT math, but you can declare both variables as INT, and just let it to an implicit converstion, dropping the LEFT altogether! DECLARE @ AS INT=RAND()*9+1,@b AS INT=...
– BradC
18 mins ago

The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
– Meerkat
11 mins ago

The stuff in the first comment definitely works, I'll edit that in. Problem with making the variables ints is that I would need to cast each individually as chars in the SELECT where necessary. With that, since each variable would need to be converted twice (in @+@a and POWER(@+@a,2)), it'd add more characters than it would save.
– Meerkat
11 mins ago

add a comment | 

up vote
1
down vote

JavaScript (ES6), 67 bytes

f=_=>(n=Math.random()*90+10|0)%10?(n/10|0)+`
$n%10
$n
`+n*n:f()

Try it online!

share|improve this answer

answered 3 hours ago

Arnauld

67.1k584282

add a comment | 

up vote
1
down vote

JavaScript (ES6), 67 bytes

f=_=>(n=Math.random()*90+10|0)%10?(n/10|0)+`
$n%10
$n
`+n*n:f()

Try it online!

share|improve this answer

answered 3 hours ago

Arnauld

67.1k584282

add a comment | 

up vote
1
down vote

up vote
1
down vote

JavaScript (ES6), 67 bytes

f=_=>(n=Math.random()*90+10|0)%10?(n/10|0)+`
$n%10
$n
`+n*n:f()

Try it online!

share|improve this answer

answered 3 hours ago

Arnauld

67.1k584282

JavaScript (ES6), 67 bytes

f=_=>(n=Math.random()*90+10|0)%10?(n/10|0)+`
$n%10
$n
`+n*n:f()

Try it online!

share|improve this answer

answered 3 hours ago

Arnauld

67.1k584282

share|improve this answer

share|improve this answer

answered 3 hours ago

Arnauld

67.1k584282

answered 3 hours ago

Arnauld

67.1k584282

answered 3 hours ago

Arnauld

67.1k584282

67.1k584282

add a comment | 

add a comment | 

up vote
1
down vote

Charcoal, 16 bytes

≔⭆²⊕‽⁹θ↓θθ⸿ＩＸＩθ²

Try it online! Link is to verbose version of code. Explanation:

≔⭆²⊕‽⁹θ

Generate two random characters in the range 1 to 9.

↓θ

Output them downwards i.e. on separate lines.

θ⸿

Output them horizontally on their own line.

ＩＸＩθ²

Cast to integer, square, cast back to string for implicit print.

share|improve this answer

answered 2 hours ago

Neil

77.2k744174

add a comment | 

up vote
1
down vote

Charcoal, 16 bytes

≔⭆²⊕‽⁹θ↓θθ⸿ＩＸＩθ²

Try it online! Link is to verbose version of code. Explanation:

≔⭆²⊕‽⁹θ

Generate two random characters in the range 1 to 9.

↓θ

Output them downwards i.e. on separate lines.

θ⸿

Output them horizontally on their own line.

ＩＸＩθ²

Cast to integer, square, cast back to string for implicit print.

share|improve this answer

answered 2 hours ago

Neil

77.2k744174

add a comment | 

up vote
1
down vote

up vote
1
down vote

Charcoal, 16 bytes

≔⭆²⊕‽⁹θ↓θθ⸿ＩＸＩθ²

Try it online! Link is to verbose version of code. Explanation:

≔⭆²⊕‽⁹θ

Generate two random characters in the range 1 to 9.

↓θ

Output them downwards i.e. on separate lines.

θ⸿

Output them horizontally on their own line.

ＩＸＩθ²

Cast to integer, square, cast back to string for implicit print.

share|improve this answer

answered 2 hours ago

Neil

77.2k744174

Charcoal, 16 bytes

≔⭆²⊕‽⁹θ↓θθ⸿ＩＸＩθ²

Try it online! Link is to verbose version of code. Explanation:

≔⭆²⊕‽⁹θ

Generate two random characters in the range 1 to 9.

↓θ

Output them downwards i.e. on separate lines.

θ⸿

Output them horizontally on their own line.

ＩＸＩθ²

Cast to integer, square, cast back to string for implicit print.

share|improve this answer

answered 2 hours ago

Neil

77.2k744174

share|improve this answer

share|improve this answer

answered 2 hours ago

Neil

77.2k744174

answered 2 hours ago

Neil

77.2k744174

answered 2 hours ago

Neil

77.2k744174

77.2k744174

add a comment | 

add a comment | 

up vote
1
down vote

Jelly, 10 9 bytes

9ṗ2XṄ€ḌṄ²

Try it online!

How it works

9ṗ2XṄ€ḌṄ² Main link. No arguments.

9 Set the return value to 9.
 ṗ2 Promote 9 to [1, ..., 9] and take the second Cartesian power, yielding
 [[1, 1], [1, 2], ..., [9, 8], [9, 9]].
 X Pseudo-randomly select one of the pairs.
 Ṅ€ Print each integer in the pair, followed by a newline.
 Ḍ Undecimal; convert the integer pair from base 10 to an integer.
 Ṅ Print the integer, followed by a newline.
 ² Take the square.
 (implicit) Print the last return value.

share|improve this answer

edited 2 hours ago

answered 2 hours ago

Dennis♦

183k32293725

add a comment | 

up vote
1
down vote

Jelly, 10 9 bytes

9ṗ2XṄ€ḌṄ²

Try it online!

How it works

9ṗ2XṄ€ḌṄ² Main link. No arguments.

9 Set the return value to 9.
 ṗ2 Promote 9 to [1, ..., 9] and take the second Cartesian power, yielding
 [[1, 1], [1, 2], ..., [9, 8], [9, 9]].
 X Pseudo-randomly select one of the pairs.
 Ṅ€ Print each integer in the pair, followed by a newline.
 Ḍ Undecimal; convert the integer pair from base 10 to an integer.
 Ṅ Print the integer, followed by a newline.
 ² Take the square.
 (implicit) Print the last return value.

share|improve this answer

edited 2 hours ago

answered 2 hours ago

Dennis♦

183k32293725

add a comment | 

up vote
1
down vote

up vote
1
down vote

Jelly, 10 9 bytes

9ṗ2XṄ€ḌṄ²

Try it online!

How it works

9ṗ2XṄ€ḌṄ² Main link. No arguments.

9 Set the return value to 9.
 ṗ2 Promote 9 to [1, ..., 9] and take the second Cartesian power, yielding
 [[1, 1], [1, 2], ..., [9, 8], [9, 9]].
 X Pseudo-randomly select one of the pairs.
 Ṅ€ Print each integer in the pair, followed by a newline.
 Ḍ Undecimal; convert the integer pair from base 10 to an integer.
 Ṅ Print the integer, followed by a newline.
 ² Take the square.
 (implicit) Print the last return value.

share|improve this answer

edited 2 hours ago

answered 2 hours ago

Dennis♦

183k32293725

Jelly, 10 9 bytes

9ṗ2XṄ€ḌṄ²

Try it online!

How it works

9ṗ2XṄ€ḌṄ² Main link. No arguments.

9 Set the return value to 9.
 ṗ2 Promote 9 to [1, ..., 9] and take the second Cartesian power, yielding
 [[1, 1], [1, 2], ..., [9, 8], [9, 9]].
 X Pseudo-randomly select one of the pairs.
 Ṅ€ Print each integer in the pair, followed by a newline.
 Ḍ Undecimal; convert the integer pair from base 10 to an integer.
 Ṅ Print the integer, followed by a newline.
 ² Take the square.
 (implicit) Print the last return value.

share|improve this answer

edited 2 hours ago

answered 2 hours ago

Dennis♦

183k32293725

share|improve this answer

share|improve this answer

edited 2 hours ago

edited 2 hours ago

edited 2 hours ago

answered 2 hours ago

Dennis♦

183k32293725

answered 2 hours ago

Dennis♦

183k32293725

answered 2 hours ago

Dennis♦

183k32293725

183k32293725

add a comment | 

add a comment | 

up vote
1
down vote

Ruby, 41 bytes

puts [(a=11+10*rand(81)/9)/10,a%10,a,a*a]

Try it online!

share|improve this answer

answered 2 hours ago

G B

7,3371327

add a comment | 

up vote
1
down vote

Ruby, 41 bytes

puts [(a=11+10*rand(81)/9)/10,a%10,a,a*a]

Try it online!

share|improve this answer

answered 2 hours ago

G B

7,3371327

add a comment | 

up vote
1
down vote

up vote
1
down vote

Ruby, 41 bytes

puts [(a=11+10*rand(81)/9)/10,a%10,a,a*a]

Try it online!

share|improve this answer

answered 2 hours ago

G B

7,3371327

Ruby, 41 bytes

puts [(a=11+10*rand(81)/9)/10,a%10,a,a*a]

Try it online!

share|improve this answer

answered 2 hours ago

G B

7,3371327

share|improve this answer

share|improve this answer

answered 2 hours ago

G B

7,3371327

answered 2 hours ago

G B

7,3371327

answered 2 hours ago

G B

7,3371327

7,3371327

add a comment | 

add a comment | 

up vote
1
down vote

Vim, 44 bytes

:%!$RANDOM

:s/0//g
2f:hy2hVpo=0*0
kYPa

Try it online!

Not the right tool for the job. This produces most likely the desired output

Step by step:

• :%!$RANDOM Enter Enter
  
  Produces a string like /bin/bash: 25266: command not found




• :s/0//g
  
  removes all zeroes




• 2f:hy2hVp
  
  moves the cursor one to the left of the colon after the number, copy the last two digits and replace the entire string with those




• o Ctrl+R = Ctrl+R 0* Ctrl+R 0 Enter
  
  add a new line and evaluate an expression. In this case, I'll multiply the number in register 0 (the one that was just copied) with itself. Result:




• Esc kYPa Enter
  
  Copy the upper line and paste it above. The cursor ends up in the first line, on the first character. Now we just have to append a line break to it

Limitations: If the result of $RANDOM is a number with less than two non-zero digits, this will not produce the desired output

share|improve this answer

edited 1 hour ago

answered 1 hour ago

oktupol

6379

add a comment | 

up vote
1
down vote

Vim, 44 bytes

:%!$RANDOM

:s/0//g
2f:hy2hVpo=0*0
kYPa

Try it online!

Not the right tool for the job. This produces most likely the desired output

Step by step:

• :%!$RANDOM Enter Enter
  
  Produces a string like /bin/bash: 25266: command not found




• :s/0//g
  
  removes all zeroes




• 2f:hy2hVp
  
  moves the cursor one to the left of the colon after the number, copy the last two digits and replace the entire string with those




• o Ctrl+R = Ctrl+R 0* Ctrl+R 0 Enter
  
  add a new line and evaluate an expression. In this case, I'll multiply the number in register 0 (the one that was just copied) with itself. Result:




• Esc kYPa Enter
  
  Copy the upper line and paste it above. The cursor ends up in the first line, on the first character. Now we just have to append a line break to it

Limitations: If the result of $RANDOM is a number with less than two non-zero digits, this will not produce the desired output

share|improve this answer

edited 1 hour ago

answered 1 hour ago

oktupol

6379

add a comment | 

up vote
1
down vote

up vote
1
down vote

Vim, 44 bytes

:%!$RANDOM

:s/0//g
2f:hy2hVpo=0*0
kYPa

Try it online!

Not the right tool for the job. This produces most likely the desired output

Step by step:

• :%!$RANDOM Enter Enter
  
  Produces a string like /bin/bash: 25266: command not found




• :s/0//g
  
  removes all zeroes




• 2f:hy2hVp
  
  moves the cursor one to the left of the colon after the number, copy the last two digits and replace the entire string with those




• o Ctrl+R = Ctrl+R 0* Ctrl+R 0 Enter
  
  add a new line and evaluate an expression. In this case, I'll multiply the number in register 0 (the one that was just copied) with itself. Result:




• Esc kYPa Enter
  
  Copy the upper line and paste it above. The cursor ends up in the first line, on the first character. Now we just have to append a line break to it

Limitations: If the result of $RANDOM is a number with less than two non-zero digits, this will not produce the desired output

share|improve this answer

edited 1 hour ago

answered 1 hour ago

oktupol

6379

Vim, 44 bytes

:%!$RANDOM

:s/0//g
2f:hy2hVpo=0*0
kYPa

Try it online!

Not the right tool for the job. This produces most likely the desired output

Step by step:

• :%!$RANDOM Enter Enter
  
  Produces a string like /bin/bash: 25266: command not found




• :s/0//g
  
  removes all zeroes




• 2f:hy2hVp
  
  moves the cursor one to the left of the colon after the number, copy the last two digits and replace the entire string with those




• o Ctrl+R = Ctrl+R 0* Ctrl+R 0 Enter
  
  add a new line and evaluate an expression. In this case, I'll multiply the number in register 0 (the one that was just copied) with itself. Result:




• Esc kYPa Enter
  
  Copy the upper line and paste it above. The cursor ends up in the first line, on the first character. Now we just have to append a line break to it

Limitations: If the result of $RANDOM is a number with less than two non-zero digits, this will not produce the desired output

share|improve this answer

edited 1 hour ago

answered 1 hour ago

oktupol

6379

share|improve this answer

share|improve this answer

edited 1 hour ago

edited 1 hour ago

edited 1 hour ago

answered 1 hour ago

oktupol

6379

answered 1 hour ago

oktupol

6379

answered 1 hour ago

oktupol

6379

6379

add a comment | 

add a comment | 

up vote
1
down vote

Java 8, 99 98 90 81 80 bytes

v->int i=81;i*=Math.random();return(i=i*10/9+11)/10+"n"+i%10+"n"+i+"n"+i*i;

-8 bytes after being inspired by @Arnauld's JavaScript answer.

-9 bytes thanks to @nwellnhof.

Try it online.

Explanation:

v-> // Method with empty unused parameter and no return-type
 int i=81;i*=Math.random();// Create a random integer `i` in the range [0,81)
 return(i=i*10/9+11) // Set `i` to 10 times `i`, integer-divided by 9, and 11 added
 /10+"n" // Return the first digit of `i`, a newline,
 +i%10+"n" // the last digit of `i`, a newline,
 +i+"n" // `i` itself, a newline,
 +i*i; // and `i` multiplied by itself
 // All concatted to each other

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
  – Kevin Cruijssen
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
1
down vote

Java 8, 99 98 90 81 80 bytes

v->int i=81;i*=Math.random();return(i=i*10/9+11)/10+"n"+i%10+"n"+i+"n"+i*i;

-8 bytes after being inspired by @Arnauld's JavaScript answer.

-9 bytes thanks to @nwellnhof.

Try it online.

Explanation:

v-> // Method with empty unused parameter and no return-type
 int i=81;i*=Math.random();// Create a random integer `i` in the range [0,81)
 return(i=i*10/9+11) // Set `i` to 10 times `i`, integer-divided by 9, and 11 added
 /10+"n" // Return the first digit of `i`, a newline,
 +i%10+"n" // the last digit of `i`, a newline,
 +i+"n" // `i` itself, a newline,
 +i*i; // and `i` multiplied by itself
 // All concatted to each other

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
  – Kevin Cruijssen
  1 hour ago
  

  
  
  
  

add a comment | 

up vote
1
down vote

up vote
1
down vote

Java 8, 99 98 90 81 80 bytes

v->int i=81;i*=Math.random();return(i=i*10/9+11)/10+"n"+i%10+"n"+i+"n"+i*i;

-8 bytes after being inspired by @Arnauld's JavaScript answer.

-9 bytes thanks to @nwellnhof.

Try it online.

Explanation:

v-> // Method with empty unused parameter and no return-type
 int i=81;i*=Math.random();// Create a random integer `i` in the range [0,81)
 return(i=i*10/9+11) // Set `i` to 10 times `i`, integer-divided by 9, and 11 added
 /10+"n" // Return the first digit of `i`, a newline,
 +i%10+"n" // the last digit of `i`, a newline,
 +i+"n" // `i` itself, a newline,
 +i*i; // and `i` multiplied by itself
 // All concatted to each other

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

Java 8, 99 98 90 81 80 bytes

v->int i=81;i*=Math.random();return(i=i*10/9+11)/10+"n"+i%10+"n"+i+"n"+i*i;

-8 bytes after being inspired by @Arnauld's JavaScript answer.

-9 bytes thanks to @nwellnhof.

Try it online.

Explanation:

v-> // Method with empty unused parameter and no return-type
 int i=81;i*=Math.random();// Create a random integer `i` in the range [0,81)
 return(i=i*10/9+11) // Set `i` to 10 times `i`, integer-divided by 9, and 11 added
 /10+"n" // Return the first digit of `i`, a newline,
 +i%10+"n" // the last digit of `i`, a newline,
 +i+"n" // `i` itself, a newline,
 +i*i; // and `i` multiplied by itself
 // All concatted to each other

share|improve this answer

edited 1 hour ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

share|improve this answer

share|improve this answer

edited 1 hour ago

edited 1 hour ago

edited 1 hour ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

answered 3 hours ago

Kevin Cruijssen

32.7k554176

answered 3 hours ago

Kevin Cruijssen

32.7k554176

32.7k554176

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
  – Kevin Cruijssen
  1 hour ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
  – Kevin Cruijssen
  1 hour ago
  

  
  
  
  

@nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
– Kevin Cruijssen
1 hour ago

@nwellnhof Thanks! And been able to golf 1 more byte with my previous trick of int i=81;i*=Math.random();return(i=i*10/9+11).
– Kevin Cruijssen
1 hour ago

add a comment | 

up vote
1
down vote

05AB1E, 14 11 bytes

2F9LΩ=}J=n,

-3 bytes thanks to @Emigna.

Try it online.

Explanation:

2F } # Loop 2 times:
 9LΩ # Create a list in the range [1,9], and pick a random element from it
 = # Output it (without popping it from the stack)
 J # Join them together
 = # Output it (without popping it from the stack)
 n # Take it to the power of 2
 , # And output it as well

---

11 bytes alternative:

9LãΩ©`®JDn»

Try it online.

Explanation:

9L # List in the range [1,9]
 ã # Cartesian product with itself: [[1,1],[1,2],[1,3],...,[9,7],[9,8],[9,9]]
 Ω # Take a random element from it
 © # Store it in the register (without popping)
 ` # Pop and push both items as separated items onto the stack
 ® # Retrieve the list of digits from the register again
 J # Join them together to a single 2-digit number
 Dn # Duplicate it, and take the power of 2 of the copy
 » # Merge all values on the stack by newlines (and output implicitly)

share|improve this answer

edited 56 mins ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Shorter in a looP: 2F9LΩ=}J=n,
  – Emigna
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Emigna I was about to look for shorter alternatives, but smart use of the =!
  – Kevin Cruijssen
  3 hours ago
  
  

  
  
  
  

add a comment | 

up vote
1
down vote

05AB1E, 14 11 bytes

2F9LΩ=}J=n,

-3 bytes thanks to @Emigna.

Try it online.

Explanation:

2F } # Loop 2 times:
 9LΩ # Create a list in the range [1,9], and pick a random element from it
 = # Output it (without popping it from the stack)
 J # Join them together
 = # Output it (without popping it from the stack)
 n # Take it to the power of 2
 , # And output it as well

---

11 bytes alternative:

9LãΩ©`®JDn»

Try it online.

Explanation:

9L # List in the range [1,9]
 ã # Cartesian product with itself: [[1,1],[1,2],[1,3],...,[9,7],[9,8],[9,9]]
 Ω # Take a random element from it
 © # Store it in the register (without popping)
 ` # Pop and push both items as separated items onto the stack
 ® # Retrieve the list of digits from the register again
 J # Join them together to a single 2-digit number
 Dn # Duplicate it, and take the power of 2 of the copy
 » # Merge all values on the stack by newlines (and output implicitly)

share|improve this answer

edited 56 mins ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Shorter in a looP: 2F9LΩ=}J=n,
  – Emigna
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Emigna I was about to look for shorter alternatives, but smart use of the =!
  – Kevin Cruijssen
  3 hours ago
  
  

  
  
  
  

add a comment | 

up vote
1
down vote

up vote
1
down vote

05AB1E, 14 11 bytes

2F9LΩ=}J=n,

-3 bytes thanks to @Emigna.

Try it online.

Explanation:

2F } # Loop 2 times:
 9LΩ # Create a list in the range [1,9], and pick a random element from it
 = # Output it (without popping it from the stack)
 J # Join them together
 = # Output it (without popping it from the stack)
 n # Take it to the power of 2
 , # And output it as well

---

11 bytes alternative:

9LãΩ©`®JDn»

Try it online.

Explanation:

9L # List in the range [1,9]
 ã # Cartesian product with itself: [[1,1],[1,2],[1,3],...,[9,7],[9,8],[9,9]]
 Ω # Take a random element from it
 © # Store it in the register (without popping)
 ` # Pop and push both items as separated items onto the stack
 ® # Retrieve the list of digits from the register again
 J # Join them together to a single 2-digit number
 Dn # Duplicate it, and take the power of 2 of the copy
 » # Merge all values on the stack by newlines (and output implicitly)

share|improve this answer

edited 56 mins ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

05AB1E, 14 11 bytes

2F9LΩ=}J=n,

-3 bytes thanks to @Emigna.

Try it online.

Explanation:

2F } # Loop 2 times:
 9LΩ # Create a list in the range [1,9], and pick a random element from it
 = # Output it (without popping it from the stack)
 J # Join them together
 = # Output it (without popping it from the stack)
 n # Take it to the power of 2
 , # And output it as well

---

11 bytes alternative:

9LãΩ©`®JDn»

Try it online.

Explanation:

9L # List in the range [1,9]
 ã # Cartesian product with itself: [[1,1],[1,2],[1,3],...,[9,7],[9,8],[9,9]]
 Ω # Take a random element from it
 © # Store it in the register (without popping)
 ` # Pop and push both items as separated items onto the stack
 ® # Retrieve the list of digits from the register again
 J # Join them together to a single 2-digit number
 Dn # Duplicate it, and take the power of 2 of the copy
 » # Merge all values on the stack by newlines (and output implicitly)

share|improve this answer

edited 56 mins ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

share|improve this answer

share|improve this answer

edited 56 mins ago

edited 56 mins ago

edited 56 mins ago

answered 3 hours ago

Kevin Cruijssen

32.7k554176

answered 3 hours ago

Kevin Cruijssen

32.7k554176

answered 3 hours ago

Kevin Cruijssen

32.7k554176

32.7k554176

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Shorter in a looP: 2F9LΩ=}J=n,
  – Emigna
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Emigna I was about to look for shorter alternatives, but smart use of the =!
  – Kevin Cruijssen
  3 hours ago
  
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  Shorter in a looP: 2F9LΩ=}J=n,
  – Emigna
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Emigna I was about to look for shorter alternatives, but smart use of the =!
  – Kevin Cruijssen
  3 hours ago
  
  

  
  
  
  

1

1

Shorter in a looP: 2F9LΩ=}J=n,
– Emigna
3 hours ago

Shorter in a looP: 2F9LΩ=}J=n,
– Emigna
3 hours ago

@Emigna I was about to look for shorter alternatives, but smart use of the =!
– Kevin Cruijssen
3 hours ago

@Emigna I was about to look for shorter alternatives, but smart use of the =!
– Kevin Cruijssen
3 hours ago

add a comment | 

up vote
1
down vote

Python 2, 84 75 bytes

from random import*
k=randint(9,89)*10/9+1
for x in k/10,k%10,k,k*k:print x

Try it online!

---

Saved

• -1 bytes, thanks to Erik the Outgolfer


• -8 bytes, thanks to nwellnhof

share|improve this answer

edited 45 mins ago

answered 3 hours ago

TFeld

12.8k2836

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Moderate golf: 83 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @EriktheOutgolfer Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  

add a comment | 

up vote
1
down vote

Python 2, 84 75 bytes

from random import*
k=randint(9,89)*10/9+1
for x in k/10,k%10,k,k*k:print x

Try it online!

---

Saved

• -1 bytes, thanks to Erik the Outgolfer


• -8 bytes, thanks to nwellnhof

share|improve this answer

edited 45 mins ago

answered 3 hours ago

TFeld

12.8k2836

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Moderate golf: 83 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @EriktheOutgolfer Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  

add a comment | 

up vote
1
down vote

up vote
1
down vote

Python 2, 84 75 bytes

from random import*
k=randint(9,89)*10/9+1
for x in k/10,k%10,k,k*k:print x

Try it online!

---

Saved

• -1 bytes, thanks to Erik the Outgolfer


• -8 bytes, thanks to nwellnhof

share|improve this answer

edited 45 mins ago

answered 3 hours ago

TFeld

12.8k2836

Python 2, 84 75 bytes

from random import*
k=randint(9,89)*10/9+1
for x in k/10,k%10,k,k*k:print x

Try it online!

---

Saved

• -1 bytes, thanks to Erik the Outgolfer


• -8 bytes, thanks to nwellnhof

share|improve this answer

edited 45 mins ago

answered 3 hours ago

TFeld

12.8k2836

share|improve this answer

share|improve this answer

edited 45 mins ago

edited 45 mins ago

edited 45 mins ago

answered 3 hours ago

TFeld

12.8k2836

answered 3 hours ago

TFeld

12.8k2836

answered 3 hours ago

TFeld

12.8k2836

12.8k2836

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Moderate golf: 83 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @EriktheOutgolfer Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Moderate golf: 83 bytes.
  – Erik the Outgolfer
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @EriktheOutgolfer Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @nwellnhof Thanks :)
  – TFeld
  45 mins ago
  

  
  
  
  

Moderate golf: 83 bytes.
– Erik the Outgolfer
1 hour ago

Moderate golf: 83 bytes.
– Erik the Outgolfer
1 hour ago

@EriktheOutgolfer Thanks :)
– TFeld
45 mins ago

@EriktheOutgolfer Thanks :)
– TFeld
45 mins ago

@nwellnhof Thanks :)
– TFeld
45 mins ago

@nwellnhof Thanks :)
– TFeld
45 mins ago

add a comment | 

up vote
0
down vote

C# (.NET Core), 130 bytes

Random r=new Random();int a=r.Next(1,9),b=r.Next(1,9),c=int.Parse(a.ToString()+b.ToString());Console.Write(a+" "+b+" "+c+" "+c*c);

Try it online!

Ungolfed:

Random r = new Random(); // initializes random number generator
int a = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 b = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 c = int.Parse(a.ToString() + b.ToString()); // concatenates a and b into one two-digit number
Console.Write(a + " " + b + " " + c + " " + c*c); // writes a, b, c, and c^2 to the console

share|improve this answer

edited 46 mins ago

answered 57 mins ago

Meerkat

1215

add a comment | 

up vote
0
down vote

C# (.NET Core), 130 bytes

Random r=new Random();int a=r.Next(1,9),b=r.Next(1,9),c=int.Parse(a.ToString()+b.ToString());Console.Write(a+" "+b+" "+c+" "+c*c);

Try it online!

Ungolfed:

Random r = new Random(); // initializes random number generator
int a = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 b = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 c = int.Parse(a.ToString() + b.ToString()); // concatenates a and b into one two-digit number
Console.Write(a + " " + b + " " + c + " " + c*c); // writes a, b, c, and c^2 to the console

share|improve this answer

edited 46 mins ago

answered 57 mins ago

Meerkat

1215

add a comment | 

up vote
0
down vote

up vote
0
down vote

C# (.NET Core), 130 bytes

Random r=new Random();int a=r.Next(1,9),b=r.Next(1,9),c=int.Parse(a.ToString()+b.ToString());Console.Write(a+" "+b+" "+c+" "+c*c);

Try it online!

Ungolfed:

Random r = new Random(); // initializes random number generator
int a = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 b = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 c = int.Parse(a.ToString() + b.ToString()); // concatenates a and b into one two-digit number
Console.Write(a + " " + b + " " + c + " " + c*c); // writes a, b, c, and c^2 to the console

share|improve this answer

edited 46 mins ago

answered 57 mins ago

Meerkat

1215

C# (.NET Core), 130 bytes

Random r=new Random();int a=r.Next(1,9),b=r.Next(1,9),c=int.Parse(a.ToString()+b.ToString());Console.Write(a+" "+b+" "+c+" "+c*c);

Try it online!

Ungolfed:

Random r = new Random(); // initializes random number generator
int a = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 b = r.Next(1, 9), // gets random number between 1 and 9 inclusive
 c = int.Parse(a.ToString() + b.ToString()); // concatenates a and b into one two-digit number
Console.Write(a + " " + b + " " + c + " " + c*c); // writes a, b, c, and c^2 to the console

share|improve this answer

edited 46 mins ago

answered 57 mins ago

Meerkat

1215

share|improve this answer

share|improve this answer

edited 46 mins ago

edited 46 mins ago

edited 46 mins ago

answered 57 mins ago

Meerkat

1215

answered 57 mins ago

Meerkat

1215

answered 57 mins ago

Meerkat

1215

1215

add a comment | 

add a comment | 

up vote
0
down vote

K (oK), 28 bytes

t:2?10;t,:10/t;$t,:t[2]*t[2]

Explanation

t:2?10 //define t as two random numbers from 1-10
 t,:10/t //join the base 10 joining of the elements of t to t
 t,:t[2]*t[2]//join the square of the index 2 element to t
 $ //String each element of the result (to output on newlines)

Try it online!

Cleaner Output, 32 bytes

t:2?10;t,:10/t;`0:$t,:t[2]*t[2];

 `0: //Cleanly prints the strings

Try it online!

share|improve this answer

edited 1 min ago

answered 29 mins ago

Thaufeki

16117

add a comment | 

up vote
0
down vote

K (oK), 28 bytes

t:2?10;t,:10/t;$t,:t[2]*t[2]

Explanation

t:2?10 //define t as two random numbers from 1-10
 t,:10/t //join the base 10 joining of the elements of t to t
 t,:t[2]*t[2]//join the square of the index 2 element to t
 $ //String each element of the result (to output on newlines)

Try it online!

Cleaner Output, 32 bytes

t:2?10;t,:10/t;`0:$t,:t[2]*t[2];

 `0: //Cleanly prints the strings

Try it online!

share|improve this answer

edited 1 min ago

answered 29 mins ago

Thaufeki

16117

add a comment | 

up vote
0
down vote

up vote
0
down vote

K (oK), 28 bytes

t:2?10;t,:10/t;$t,:t[2]*t[2]

Explanation

t:2?10 //define t as two random numbers from 1-10
 t,:10/t //join the base 10 joining of the elements of t to t
 t,:t[2]*t[2]//join the square of the index 2 element to t
 $ //String each element of the result (to output on newlines)

Try it online!

Cleaner Output, 32 bytes

t:2?10;t,:10/t;`0:$t,:t[2]*t[2];

 `0: //Cleanly prints the strings

Try it online!

share|improve this answer

edited 1 min ago

answered 29 mins ago

Thaufeki

16117

K (oK), 28 bytes

t:2?10;t,:10/t;$t,:t[2]*t[2]

Explanation

t:2?10 //define t as two random numbers from 1-10
 t,:10/t //join the base 10 joining of the elements of t to t
 t,:t[2]*t[2]//join the square of the index 2 element to t
 $ //String each element of the result (to output on newlines)

Try it online!

Cleaner Output, 32 bytes

t:2?10;t,:10/t;`0:$t,:t[2]*t[2];

 `0: //Cleanly prints the strings

Try it online!

share|improve this answer

edited 1 min ago

answered 29 mins ago

Thaufeki

16117

share|improve this answer

share|improve this answer

edited 1 min ago

edited 1 min ago

edited 1 min ago

answered 29 mins ago

Thaufeki

16117

answered 29 mins ago

Thaufeki

16117

answered 29 mins ago

Thaufeki

16117

16117

add a comment | 

add a comment | 

up vote
0
down vote

PHP, 64 bytes

<?$d=($c=(10*($a=rand(1,9))+$b=rand(1,9)))*$c;echo"$a
$b
$c
$d";

Try it online!

share

answered 1 min ago

Jo.

98419

add a comment | 

up vote
0
down vote

PHP, 64 bytes

<?$d=($c=(10*($a=rand(1,9))+$b=rand(1,9)))*$c;echo"$a
$b
$c
$d";

Try it online!

share

answered 1 min ago

Jo.

98419

add a comment | 

up vote
0
down vote

up vote
0
down vote

PHP, 64 bytes

<?$d=($c=(10*($a=rand(1,9))+$b=rand(1,9)))*$c;echo"$a
$b
$c
$d";

Try it online!

share

answered 1 min ago

Jo.

98419

PHP, 64 bytes

<?$d=($c=(10*($a=rand(1,9))+$b=rand(1,9)))*$c;echo"$a
$b
$c
$d";

Try it online!

share

answered 1 min ago

Jo.

98419

share

share

answered 1 min ago

Jo.

98419

answered 1 min ago

Jo.

98419

answered 1 min ago

Jo.

98419

98419

add a comment | 

add a comment | 

 

draft saved

draft discarded

 

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name Email

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodegolf.stackexchange.com%2fquestions%2f175006%2fnumbers-manipulation-challenge%23new-answer', 'question_page');

);

Post as a guest

Name Email

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name Email

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name Email

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name Email

Name Email

Name

Email

Name Email

Name

Email