Least Common Multiple

John works every 4 days.  Chris works every 7 days.  How many days until they work together again?

• 28

• 11

• 3

• 35

What is the least common multiple (LCM) of 5 and 20?

• 4

• 5

• 20

• 100

What is the least common multiple (LCM) of 2 and 3?

• 6

• 8

• 20

• 10

What is the least common multiple (LCM) of 4 and 10?

• 4

• 40

• 15

• 20

What is the least common multiple (LCM) of 6 and 8?

• 6

• 8

• 48

• 24

What is the least common multiple (LCM) of 2 and 5?

• 2

• 10

• 20

• 7

What is the LCM of 2, 4, 6?

• 6

• 12

• 4

• 2

What is the LCM of 12 and 10?

• 120

• 60

• 2

• 150

What is the LCM of 6 and 9?

• 3

• 18

• 30

• 36

What is the Least Common Multiple of 4 and 14

• 28

• 42

• 56

• 24