GCF and LCM

What is the greatest common factor of 15 and 36?

• 6

• 8

• 4

• 3

What is the Greatest Common Factor of 40 and 100?

• 20

• 10

• 5

• 1

What is the GCF of 56 and 80?

• 8

• 4

• 2

• 1

What is the least common multiple of 6 and 12?

• 2

• 12

• 24

• 36

What is the least common multiple of 6 and 9?

• 3

• 18

• 36

• 54

What is the least common multiple of 8 and 9?

• 144

• 36

• 18

• 72

What is the least common multiple of 2 and 11?

• 11

• 110

• 22

• 44

LCM(5, 10) =

• 50

• 30

• 10

• 5

Find the greatest common factor of 20 and 30

• 2

• 5

• 10

• 15

Answer explanation

What is the GCF of 8 and 10?

• 1

• 3

• 4

• 2