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Project Euler 288 Solution

Find the number of factors in an enormous factorial.

Project Euler 231 Solution

The prime factorisation of binomial coefficients

SPOJ Problem 11. Factorial (FCTRL) Trailing zeros in factorials

Find the number of trailing zeros in a factorial

Project Euler 121 Solution

Investigate the game of chance involving colored discs.

Project Euler 20 Solution

Find the sum of the digits in 100!

Project Euler 15 Solution

Find the number of routes from the top left corner to the bottom right corner in a rectangular grid.

Project Euler 53 Solution

Count the values of C(n,r), for 1 ≤ n ≤ 100, that exceed one-million.

Project Euler 74 Solution

Determine the number of factorial chains that contain exactly sixty non-repeating terms.

Project Euler 34 Solution

Find the sum of all numbers which are equal to the sum of the factorial of their digits.