What is the greatest common factor of 8 and 20?

You need to find the biggest number that is a factor of both 8 and 20. Factor's are whole numbers that can be multiplied by other whole numbers to get that number.

Factors of 8

1, 2, 4, 8

Factors of 20

1, 2, 4, 5, 10, 20

The greatest common factor is 4

The greatest common factor is 4