Learning Factorials

A Factorial, usually seen written as n! is the product of all the integers that are less than n.

For example 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720

It is very important to know that when dividing factorials you can reduce the common multiples.

For example 8! / 6! would be:

(8 x 7 x 6 x 5 x 4 x 3 x 2 x 1) / (6 x 5 x 4 x 3 x 2 x 1) and can be reduced to

8 x 7 = 56

Watch the math video below for a detailed explanation!

Practice Math Problems

1. What does 4! = ?
2. What does 5! - 3! = ?
3. What does 6! - 1! = ?
4. What does 10! / 8! = ?
5. What does 3! * 4! = ?
6. What does 7! / 4! = ?
7. What does 3! = ?
8. What does 5! + 2! + 2! = ?
9. What does 3! / 1! = ?
10. What does 8! / 7! = ?