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
Times 2 - START HERE
Swap the input arguments
Calculate the area of a triangle between three points
Equal to their cube
07 - Common functions and indexing 4
Find the maximum two numbers of every column of a matrix
Big Integer Sqrt
Seperate array to small section according to its index position
Successive zeros (harder)
Put m balls into n boxes
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