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factorials

This tag is associated with 9 posts

By Mike Molony ⋅ July 15, 2014 ⋅ Post a comment

The prime factorisation of binomial coefficients

By Mike Molony ⋅ February 20, 2013 ⋅ 2 comments

Find the number of trailing zeros in a factorial

By Mike Molony ⋅ March 22, 2015 ⋅ 3 comments

Find the number of factors in an enormous factorial.

Investigate the game of chance involving colored discs.

By Mike Molony ⋅ April 19, 2009 ⋅ Post a comment

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

Find the sum of the digits in 100!

By Mike Molony ⋅ April 8, 2009 ⋅ One comment

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

By Mike Molony ⋅ April 11, 2009 ⋅ Post a comment

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

By Mike Molony ⋅ April 8, 2009 ⋅ One comment

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

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