Greatest Common Factor

What is the GCF of 24 and 30?

• 2

• 12

• 6

• 3

What is the greatest common factor of 16 and 24? 

• 6

• 2

• 4

• 8

What is the greatest common factor of 4 and 16?

• 4

• 2

• 1

• 16

What is the greatest common factor of 4 and 8?

• 2

• 8

• 4

• 1

What is the greatest common factor of 8 and 10?

• 1

• 3

• 4

• 2

GCF 15 and 36

• 8

• 6

• 3

• 4

GCF of 8 and 20

• 8

• 2

• 4

• 10

GCF of 12 and 28

• 3

• 6

• 2

• 4

GCF of 15 and 35

• 15

• 3

• 7

• 5

GCF of 18 and 24

• 2

• 3

• 4

• 6