A perfect number occurs whent the sum of all divisors of a positive integer, except the number itself, equals the number.
28 = 1 + 2 + 4 + 7 + 14;
so return true
10 ~= 1 + 2 + 5
so return false
Filter AC, pass DC
matrix of natural number
Determine the square root
Beginner's Problem - Squaring
Compute the intersect point of line and plan
Solve Sudoku puzzle step by
Return fibonacci sequence do not use loop and condition version 3
Make an anonymous function that has variable output
Find the maximum two numbers of every column of a matrix
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