Greatest Common Factor

Find the greatest common factor of 12 and 18.

• 6

• 15

• 9

• 3

What is the greatest common factor of 24 and 36?

• 6

• 18

• 12

• 30

Determine the greatest common factor of 15 and 25.

• 10

• 5

• 20

• 3

Calculate the greatest common factor of 40 and 60.

• 20

• 10

• 30

• 50

Find the greatest common factor of 16 and 24.

• 20

• 12

• 4

• 8

What is the greatest common factor of 35 and 49?

• 14

• 10

• 5

• 7

Determine the greatest common factor of 72 and 90.

• 18

• 45

• 36

• 9

Calculate the greatest common factor of 63 and 84.

• 7

• 42

• 105

• 21

Find the greatest common factor of 20 and 30.

• 25

• 10

• 15

• 5

What is the greatest common factor of 42 and 56?

• 21

• 35

• 7

• 14