Factorials

Front

What is a factorial?

Back

A factorial, denoted as n!, is the product of all positive integers from 1 to n. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120.

Front

What is the value of 0! ?

Back

0! = 1 by definition.

Front

Calculate 5!

Back

5! = 120.

Front

What is the formula for n! ?

Back

n! = n × (n-1)! for n > 0, and 0! = 1.

Front

What is 3! ?

Back

3! = 3 × 2 × 1 = 6.

Front

What is the value of 4! ?

Back

4! = 4 × 3 × 2 × 1 = 24.

Front

What is the relationship between n! and (n-1)! ?

Back

n! = n × (n-1)!.

Front

If n = 6, what is n! ?

Back

6! = 720.

Front

What is the value of 2! + 3! ?

Back

2! + 3! = 2 + 6 = 8.

Front

What is 5! ÷ 3! ?

Back

5! ÷ 3! = 120 ÷ 6 = 20.