LCM and GCF

What is the LCM of 5, 8, and 10

• 20

• 40

• 60

• 80

Jerry purchased 24 roses and 56 daisies to make flower arrangements. He needs to buy vases for each group of flowers. If he wants to use all of the flowers and create identical vases of flowers, what is the greatest number of groups of flowers he can make?

• 12

• 4

• 10

• 8

Jane has 18 juice boxes, 24 bags of peanuts and 36 apples.  She wants to make snack bags with the same number of each thing in each bag.  What is the greatest number of snack bags Jane can make.

• 4

• 6

• 8

• 10

At B-Town Middle School, the school is going to put a blue sticker on every 4th locker and a red sticker on every 14th locker. Some lockers will get BOTH stickers. What number locker will be the first to get both? (Starting at locker 1).

• 14

• 20

• 28

• 42

The school cafeteria serves tacos every sixth day and cheeseburgers every eight day. If tacos and cheeseburgers are both on today’s menu, how many days will it be before they are both on the menu again?

• 14 days

• 24 days

• 34 days

• 44 days

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

Henry and Margo both began traveling around a circular track. Henry is riding his bike, and Margo is walking. It takes Henry 7 minutes to make it all the way around, and Margo takes 12 minutes. How much time will pass until they meet at the starting line?

• 84 minutes

• 48 minutes

• 854 minutes

• 78 minutes

Which pair of numbers has a LCM of 20?

• 4 and 5

• 2 and 10

• 5 and 10

• 4 and 6

Find the LCM of 18 and 24

• 6

• 72

• 24

• 5

Which is the GCF of 4 and 12?

• 2

• 4

• 12

• 24