Question

How many permutations are in the word star?

Answer 1

`4! = 24` permutations of the letters, of which `5` are English words.

Explanation:

There are `4! = 4 * 3 * 2 * 1 = 24` permutations of the letters.

Of those `24` permutations, the only ones which are English words are:

arts, rats, star, tars, tsar

This set of four letters is surpassed in its flexibility by the letters of "stop", six of whose permutations are English words:

opts, post, pots, spot, stop, tops