how many 3 digit combinations can be made with i have been told only 1, when i asked jeeves Think about forming one of the three digit numbers. Use this form to generate a list of unique (non-repeating) randomly ordered 3 digit numbers. (How does this work? See Steve Gibson's overview.). This is the number of ways of choosing a 3-digit combination in which the three digits are all distinct: there are 10 ways to choose the first digit.