I'm getting different answers.. can u give a more clear explanation?
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Back to basics 15 - classes
Rotate a Matrix by 90 degrees
Permute diagonal and antidiagonal
subtract central cross
Fractal: area and perimeter of Koch snowflake
The last non-zero digit of a factorial
The number of trailing zero digit of a factorial
Make a rainbow matrix (follow-up to checkerboard matrix)
Smallest n, for n! to have m trailing zero digits
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