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
Tell me the slope
Flip the main diagonal of a matrix
Make a 1 hot vector
Output any real number that is neither positive nor negative
CONVERT TAN TO SIN
Find the right number make the equation
Determine if input is a Narcissistic number
Repeat copies of array elements
Find the maximum two numbers of every column of a matrix
Return fibonacci sequence do not use loop and condition version 2
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