Question

How many 3 letter words can be made from the letters of nonillion if no repeated letters are allowed?

Answer 1

There are only four distinct letters: i, l, n, o. By words I assume any 3-letter combinations.
There are 4 ways to select 3 out of 4 letters and there are 6 ways to arrange the 3 letters so the total number of words is 4*6=24.