test is a given integer number is Happy of not?
answer 1 if yes or 0 is no
sorry for that.
Back to basics 25 - Valid variable names
Return area of square
Sum of diagonals elements of a matrix
Back to basics - mean of corner elements of a matrix
Beginner's Problem - Squaring
Magic Concentric Circles
Tony's trick for duplicating an mx1 vector n times
Create numeric palindromes and their square roots
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