Answer 1

47 chrs, based on @Ace's code.
https://code.sololearn.com/cYt5wCoPolaG/?ref=app
2nd one (54 chrs)
https://code.sololearn.com/c7kZVzcmnhsK/?ref=app
3rd one with input (60 chrs)
https://code.sololearn.com/ceqeRBtGudMi/?ref=app

Answer 2

My try:
https://code.sololearn.com/Wkc4ddFwv3Mn/?ref=app

Answer 3

Nice challenge but I found my C# approach is very similar to most implementations here after finished the code and I believe Python or Ruby can do it much better. Anyway here you go:

https://code.sololearn.com/cZo4V24ERPS8/?ref=app

Answer 4

2 line code with checking the correct user input...
https://code.sololearn.com/ctEoT725FyrW/#java

Answer 5

https://code.sololearn.com/cPhvh3nRvOgs/?ref=app

Answer 6

here is my try:-
https://code.sololearn.com/coEeol0fcubY/?ref=app

Answer 7

my practice on python https://code.sololearn.com/cTDyHuAw5Cel/#py :)

Answer 8

Number.prototype.rip = function() {
var a = this+''.split('');
var n = Number(a[0]+a[1]) + Number(a[2]+a[3]);
return this==n*n?true:false;
}
https://code.sololearn.com/WhAIwCuYAmyo/?ref=app

Answer 9

I can't part Python :(
https://code.sololearn.com/c7jRunF3CFL1/?ref=app

Answer 10

I made too much Python codes.
Gotta do it in a new language

Answer 11

125 characters amazing Karthikey?

Answer 12

ok guys .... less than 70 characters :-))
including a kind of readable answer
(thanks to pre-work of the challenger)

https://code.sololearn.com/cpkf7jHGXfNG

Answer 13

Second attempt
8 lines only
https://code.sololearn.com/cEM6CzD8a9Ik/?ref=app

Answer 14

I updated code, thanka for reminding Ace

Answer 15

@Ven It will be more shorter than you if I remove 2nd line

Answer 16

Lol mine is 121 characters perfectly 11^2 lol

Answer 17

@Ekansh You have to take input from user and check if it is b/w 1000 and 9999( including)

Answer 18

@Kartikey but it's not specified in the Challenge.

Answer 19

My rushed attempt in java
https://code.sololearn.com/cn6IyVgTGU0t/?ref=app

Answer 20

Mine is perfect too, 5^3