Need a better test suite to prevent cheesy solutions like this one. :-) Some N>10 values in there would help. N>50 would be even better.
Encode Roman Numerals
Back to basics 1 - Saving
Reference Index Number
Rotate Matrix @180 degree
Extra safe primes
Number of even divisors of a given number
Fractal: area and perimeter of Koch snowflake
The number of trailing zero digit of a factorial
Equal temperament - musical notes and frequency
Smallest n, for n! to have m trailing zero digits
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