# What are all the factors pairs of 20?

There are 3 factor pairs of 20.

20 = 1 x 20

20 = 2 x 10

20 = 4 x 5

### What are the common factor of 6 and 20?

Make two lists(one for factors of 6, and the other for factors of 20). In other words, find all the possible pairs of two numbers that can multiply together to make 6 and 20. 1 x 6 = 6 2 x 3 = 6 1 x 20 = 20 2 x 10 = 20 4 x 5 = 20 Secondly, you would look at your list of factors and determine which number(s) appear in both…