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 25 - Valid variable names
Angle between Two Vectors
Insert zeros into vector
Relative ratio of "1" in binary number
Do Fast Fourier Transformation
Compute the intersect point of line and plan
Find the maximum two numbers of every column of a matrix
Make an anonymous function that has variable output
Seperate array to small section according to its index position
Put m balls into n boxes (again)
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