Greatest Common Factor

What is the greatest factor of 28 and 49?

• 1

• 2

• 7

• 12

GCF of 99 and 54

• 9

• 3

• 6

• 8

What is the GCF of 20 and 30?

• 5

• 2

• 10

• 20

GCF of 24 and 56

• 2

• 4

• 6

• 8

GCF of 10 and 50

• 10

• 2

• 5

• 50

GCF of 8 and 20

• 8

• 2

• 4

• 10

GCF of 36 and 99

• 9

• 6

• 11

• 4

GCF of 16 and 40

• 4

• 8

• 2

• 10

GCF of 12 and 28

• 3

• 6

• 2

• 4

GCF of 15 and 35

• 15

• 3

• 7

• 5