The Problem: What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, ...

The Problem: A perfect number is a number for which the sum of its proper divisors is exactly eq...

The Problem: Get the total sum of a file of names if each letter in the name is mapped from 1-26...

The Problem: Let d(n) be defined as the sum of proper divisors of (numbers less than n which div...

The Problem: What is the sum of the digits of 100! where n! means 1x2x3x4x...xn? Considerations...

The Problem: How many Sundays fell on the first of the month between Jan 1 1901 and Dec 31 2000?...

The Problem: Moving through a triangle of number (every number chosen yields 2 more numbers to c...

The Problem: If you were to write out a number as a word, you could then count the letters and g...

The Problem: What is the sum of the digits of 2^1000? Considerations: With python we can trivi...

The Problem: How many paths can you take if you just walk through a grid by only moving down and...