GCF/LCM Review Sheet

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

Two clocks are turned on at the same time. One clock chimes every 15 minutes. The other clock chimes every 25 minutes. In how many minutes will they chime together?

• 55 minutes

• 25 minutes

• 60 minutes

• 75 minutes

You have a set of 12 hearts, 16 diamonds, and 20 clubs that need to be put into equal groups.  Each group must be made up of the same number of hearts, diamonds, and clubs.  What is the greatest number of groups that can be made?

• 6 groups

• 2 groups

• 4 groups

What is the LCM (Least Common Multiple) of 4 and 10?

• 4

• 40

• 15

• 20

What is the GCF (Greatest Common Factor) of 12 and 6?

• 1

• 6

• 2

• 3

Find the LCM (Least Common Multiple) of 3 and 5.

• 15

• 20

• 30

• 33

What is the LCM (Least Common Multiple) of 8 and 12?

• 48

• 24

• 76

• 96

What is the GCF (Greatest Common Factor) of 12 and 30?

• 4

• 2

• 5

• 6

Find the LCM (L east C ommon M ultiple) of 18 and 24.

• 6

• 72

• 24

• 5

Find the GCF (Greatest Common Factor) of 64 and 144.

• 8

• 6

• 16

• 2