Finding Greatest Common Factor

What is the greatest common factor of 12 and 18?

• 15

• 3

• 6

• 9

Find the greatest common factor of 24 and 36.

• 30

• 18

• 6

• 12

Determine the greatest common factor of 30 and 45.

• 10

• 20

• 25

• 15

Calculate the greatest common factor of 16 and 24.

• 8

• 20

• 12

• 10

What is the greatest common factor of 40 and 60?

• 20

• 25

• 30

• 15

Find the greatest common factor of 72 and 108.

• 45

• 60

• 24

• 36

Determine the greatest common factor of 50 and 75.

• 40

• 15

• 30

• 25

Calculate the greatest common factor of 28 and 42.

• 30

• 14

• 20

• 10

What is the greatest common factor of 80 and 120?

• 20

• 40

• 60

• 100

Find the greatest common factor of 90 and 135.

• 45

• 60

• 30

• 75