How many different 4 digit numbers are there if no digit is repeated?

- stapel_eliz
**Posts:**1738**Joined:**Mon Dec 08, 2008 4:22 pm-
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janig73 wrote:How many different 4 digit numbers are there if no digit is repeated?

How many options do you have for the first digit?

How many options are left for the second digit?

How many options are left for the third digit?

How many options are left for the last digit?

Multiplying, how many options are there, in total?