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
Return the largest number that is adjacent to a zero
Better bullseye matrix
Back to basics 6 - Column Vector
03 - Matrix Variables 3
Create a two dimensional zero matrix
Seperate array to small section according to its index position
Find the regional maximum value
Big Integer Sqrt
Make an anonymous function that has variable output
Compute the intersect point of line and plan
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