Python Archives - Page 13 of 16

By Mike Molony ⋅ April 13, 2009 ⋅ 12 comments

Investigate values of n for which φ(n) is a permutation of n.

By Mike Molony ⋅ January 20, 2011 ⋅ Post a comment

Listing reduced proper fractions in ascending order of size.

By Mike Molony ⋅ January 20, 2011 ⋅ 3 comments

How many elements would be contained in the set of reduced proper fractions for d ≤ 1,000,000?

By Mike Molony ⋅ January 20, 2011 ⋅ 2 comments

Find the number of fractions that lie between 1/3 and 1/2 in a sorted set of reduced proper fractions.

By Mike Molony ⋅ April 8, 2009 ⋅ One comment

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

By Mike Molony ⋅ June 8, 2009 ⋅ 4 comments

Count the different lengths of wire that can form a right angle triangle in only one way.

By Mike Molony ⋅ March 31, 2009 ⋅ One comment

How many different ways can one hundred be written as a sum of at least two positive integers?

Find the first value which can be written as the sum of primes in over five thousand different ways.

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

Investigating the number of ways in which coins can be separated into piles.

By Mike Molony ⋅ July 16, 2011 ⋅ One comment

Calculating the sum of the decimal digits of irrational square roots.

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