Factors and Greatest Common Factors

What is the GCF of 21 and 49?

GCF of 32 and 40

• 2

• 4

• 6

• 8

GCF of 50 and 100

• 10

• 25

• 50

• 5

What is the GCF of 36 and 24?

• 6

• 12

• 8

• 9

GCF of 99 and 54

• 9

• 3

• 6

• 8

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