I'm getting different answers.. can u give a more clear explanation?
Project Euler: Problem 1, Multiples of 3 and 5
middleAsColumn: Return all but first and last element as a column vector
Sum of odd numbers in a matrix
Sum of series III
Calculate area of sector
The number of trailing zero digit of a factorial
Number of paths on a n-dimensional grid
Make a rainbow matrix (follow-up to checkerboard matrix)
Fractal: area and perimeter of Koch snowflake
Smallest n, for n! to have m trailing zero digits
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