For given positive integer n, take factorial of that number. How many trailing zeros does it have?
Example: factorial(11) = 39916800
Its last zero-digit count is 2.
Optional: Can you make an efficient algorithm for a very large n?
Times 2 - START HERE
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Getting the indices from a matrice
Create a Multiplication table matrix...
Under the sea: Snell's law & total internal reflection
Smallest n, for n! to have m trailing zero digits
Fractal: area and perimeter of Koch snowflake
Number of even divisors of a given number
Make a rainbow matrix (follow-up to checkerboard matrix)
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