how to calculate a factorial

To do a factorial all you have to do is multiply all numbers that come before. So if you wanted to do 4 factorial it would be 4*3*2*1, or 6 factorial would be 6*5*4*3*2*1.

Terry:

calculate 10 factorial

Walt gave you a good answer.

there is also a factorial button on your calculator.

It looks like ! you will probably need to press 'shift' or '2nd' to bring it up.

on my calc if i want 5! i press

'shift' x! 5 =
and the answer is 120