Question

Evaluate
4!
which formula would I use?

Answer 1

The exclamation point after the number means `factorial`

You start with the given number, and multiply ALL of the whole numbers smaller than it til you get to 1


Examples:
7! = 7*6*5*4*3*2*1 = 5040
9! = 9*8*7*6*5*4*3*2*1 = 362,880
5! = 5*4*3*2*1 = 120