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
Distance walked 1D
The Tower of Hanoi
Back to basics 5 - Clipboard
Return fibonacci sequence do not use loop and condition version 2
Compute the intersect point of line and plan
Big Integer Sqrt
Find the regional maximum value
Project Euler: Problem 14 Longest Collatz sequence(harder version)
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