A Pythagorean triplet is a set of three natural numbers, a b c, for which,

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

The prime factors of 13195 are 5, 7, 13 and 29.

Haskellではリストは以下の3つに分けられる