Greatest Common Factor

3 x 5 = 15 is the Greatest Common Factor (GCF) of what numbers?

• 30, 70 and 90

• 20, 80 and 100

• 45, 60 and 90

• 25, 45, and 85

What is the GCF of 4 and 12?

• 3

• 1

• 6

• 4

Princess is making identical balloon arrangements for a party. She has 32 maroon balloons, 24 white

balloons, and 16 orange balloons. She wants each arrangement to have the same number of each

color. What is the greatest number of arrangements that she can make if every balloon is used?

• 6

• 2

• 4

• 8

Find the Greatest Common Factor of 
12 and 24
 

• 12

• 24

• 14

• 18

GCF of 50 and 100

• 10

• 25

• 50

• 5

What is the GCF of 36 and 24?

• 6

• 12

• 8

• 9

GCF of 99 and 54

• 9

• 3

• 6

• 8

What is the GCF of 20 and 30?

• 5

• 2

• 10

• 20

GCF of 10 and 50

• 10

• 2

• 5

• 50

GCF of 8 and 20

• 8

• 2

• 4

• 10