Factors & Multiples Review

What are all the factors of 20?

• 1, 2, 3, 4, 5, 20

• 2, 4, 5, 10

• 1, 2, 4, 5, 10, 20

• 1, 2, 4, 5, 6, 10, 14, 20

What is the greatest common factor (GCF) of 8 and 12?

• 12

• 4

• 8

• 24

What is the least common multiple (LCM) of 4 and 6?

• 2

• 12

• 18

• 24

What number is a factor of all numbers?

When we list factors, we always start with ____________.

• the number itself

• 1

When we list multiples, we always start with ____________.

• the number itself

• 1

What are all the factors of 36?

• 1, 2, 3, 6, 12, 18, 36

• 2, 3, 4, 6, 9, 12, 18

• 1, 2, 3, 4, 6, 9, 12, 36

• 1, 2, 3, 4, 6, 9, 12, 18, 36