Prime #s and GCF Practice

Find the greatest common factor of 12x and 18y.

• 6

• 4

• 3

• 9

What is the GCF of 20a and 30b?

• 15

• 10

• 5

• 25

Determine the greatest common factor of 15m and 25n.

• 10

• 3

• 7

• 5

Calculate the GCF of 16x and 24y.

• 4

• 8

• 12

• 6

Find the greatest common factor of 9a and 27b.

• 9

• 12

• 6

• 3

What is the GCF of 14x and 21y?

• 3

• 5

• 10

• 7

Determine the greatest common factor of 10m and 25n.

• 12

• 8

• 5

• 2

Calculate the GCF of 18x and 27y.

• 15

• 12

• 6

• 9

Find the greatest common factor of 8a and 12b.

• 4

• 10

• 2

• 6

What is the GCF of 22x and 33y?

• 44xy

• 55

• 11

• 22x33y