Question

How many different id cards can be made if there are 6 digits on a card and no digit can be used more than once?

Answer 1

There are 6 digits on a card ( 0 - 9 ).
10 * 9 * 8 * 7 * 6 * 5 = 151,200
Answer:
151,200 different id cards can be made if there are 6 digits on a card and no digit can be used more than once.