Least Common Multiple

LCM(3, 8) =

• 16

• 24

• 32

• 48

LCM(6, 7) =

• 84

• 21

• 13

• 42

LCM(2, 8) =

• 8

• 4

• 16

• 24

LCM(10, 4)

• 40

• 20

• 30

• 10

Cups are sold 5 to a package and plates are sold 10 to a package. If you want to have the same number of each item for a party, what is the least number of packages of each you need to buy?

• 30

• 20

• 50

• 10

A radio station is giving away a $10 bill to every 5th caller and movie tickets to every 6th caller. Which caller will be the first to win both prizes?

• 10

• 12

• 20

• 30

• 36

The red subway comes every 5 minutes. The blue subway comes every 8 minutes. If they are both at the station now, how long will it be until they are both at the station again?

• 20

• 24

• 35

• 40

What is the least common multiple of 4 and 5?

• 12

• 25

• 20

• 30

What is the least common multiple of 2 and 7?

• 2

• 7

• 12

• 14

What is the least common multiple of 5 and 10

• 5

• 20

• 10

• 15