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
So many choices
Change the sign of even index entries of the reversed vector
sum of first 'n' terms
Check if equal
Check that number is whole number
Compute the intersect point of line and plan
Return fibonacci sequence do not use loop and condition version 3
Successive zeros (harder)
Find the maximum two numbers of every column of a matrix
Determine if input is a Narcissistic number
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