Find Common Factors

Greatest common factors of 9 and 15

• 5

• 4

• 3

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

Find the greatest common factor of 32 and 48

• 2

• 8

• 16

• 18

What is the GCF of 4 and 12?

• 3

• 1

• 6

• 4

Find the Greatest  Common Factor (GCF) of 14 & 22.

• 1

• 2

• 7

• 14

Sara had 16 red flowers and 24 yellow flowers.  She wants to make bouquets with the same number of each color flower in each bouquet.  What is the greatest number of bouquets that she can make?

• 4

• 2

• 48

• 8

What is the GCF of 20, 44, and 88?

• 4

• 2

• 22

• 1

What is the GCF of 20 and 30?

• 5

• 2

• 10

• 20

Ms. Waters was trying to find the GCF using the ladder method, but she made an error along the way! Identify the step where she went wrong. 

• Step 1

• Step 2

• Step 3

• Step 4