Factor Review

Which is a factor of 15?

• 2

• 3

• 4

• 6

GCF of 20 and 35

• 4

• 5

• 7

• 20

List all the factors of 12

• 1, 2, 3, 4, 6, 12

• 1, 2, 4, 12

• 1, 12

• 1, 2, 3, 4, 5, 6, 12

What is the GCF of 4 and 12?

• 3

• 1

• 6

• 4

GCF of 28 and 40

• 2

• 4

• 7

• 8

What is the greatest common factor of 8 and 10?

• 1

• 3

• 4

• 2

What is the greatest common factor of 6 and 21?

• 6

• 2

• 3

• 7

What is the GCF of 18 and 24?

• 3

• 6

• 8

• 9

Find the greatest common factor of 20 and 30.

• 2

• 5

• 10

• 15

Find the greatest common factor of 24 and 48

• 4

• 12

• 24

• 48