Greatest Common Factor

What is the Greatest Common Factor of 9 and 36?

• 3 x 3 x 2 x 2 = 36

• 3 x 3 x 3 = 27

• 3 x 3 x 2 = 18

• 3 x 3 = 9

What is the GCF of the following numbers 27, 45, and 81?

• 3 x 3 x 5

• 3 x 3 x 3

• 3 x 3

• 3 x 3 x 3 x 2

Find the greatest common factor of 20 and 30.

• 2

• 5

• 10

• 15

What is the greatest common factor of 32 and 40?

• 8

• 16

• 4

• 12

Identify the GCF of 45 and 27.

• 9

• 27

• 3

• 5

If the GCF of two numbers is 7, which of the following pairs of numbers could it be?

• 14 and 23

• 27 and 49

• 35 and 14

• All of the above

What is the greatest common factor (GCF) of 18 and 24?

• 6

• 4

• 3

• 12

Match the following GCF to the Expression

• 6

• 4 and 4

• 12

• 28 and 49

• 7

• 12 and 24

• 3

• 6 and 9

• 4

• 6 and 18

The Greatest Common Factor of 16 and 40 is ​ (a)  

• 8

• 4

• 5

• 2

• 16

• 32

• 3

• 11

GCF 24 and 36

• 8

• 6

• 12

• 4