GCF and LCM

What is the LCM of 6 and 8?

• 24

• 48

• 12

• 18

Find the GCF of 20 and 50.

• 5

• 10

• 15

• 20

What is the LCM of 3 and 4?

• 7

• 12

• 9

• 15

What is the LCM of 7 and 14?

• 14

• 21

• 28

• 35

Find the GCF of 16 and 24.

• 4

• 6

• 8

• 12

What is the LCM of 8 and 12?

• 16

• 24

• 32

• 36

What is the Greatest Common Factor (GCF) of 36 and 48?

• 6

• 12

• 18

• 24

Two numbers have a GCF of 5 and an LCM of 60. If one of the numbers is 15, what is the other number?

• 10

• 20

• 25

• 30

What is the GCF of 81 and 108?

• 9

• 27

• 36

• 54

What is the GCF of 28, 42, and 70?

• 7

• 14

• 21

• 28