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?
Triangle Numbers Below N
Multiply 2 numbers
Create an anti-identity matrix
Compute LOG(1+X) in natural log
Number of even divisors of a given number
Number of paths on a n-dimensional grid
Smallest n, for n! to have m trailing zero digits
Make a rainbow matrix (follow-up to checkerboard matrix)
Fractal: area and perimeter of Koch snowflake
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