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
Back to basics 9 - Indexed References
Set some matrix elements to zero
Is the input divisible by 3?
02 - Vector Variables 1
Find the maximum two numbers of every column of a matrix
Find the right number make the equation
Put m balls into n boxes
Put m balls into n boxes (again)
Return fibonacci sequence do not use loop and condition version 3
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