Least Common Multiples and Least Common Denominator

Find the Least Common Multiple of 9 and 4

Find the Least Common Multiple of 3 and 12

• 6

• 9

• 54

• 18

While at school, Cooper has a math quiz every 6 days and a science quiz every 4 days. On Feb. 15, he had BOTH tests. Assuming no school days off or weekends, when will he have both tests on the same day again?

• February 27

• February 29

• March 2

• March 16

• 4

• 40

• 20

• 5

• 15

• 3

• 45

• 30

• 45

• 9

• 5

• 90

Find the least common denominator of 1/5 and 2/10.

• 10

• 5

• 50

• 15

Find the least common denominator of 3/4 and 3/8.

• 3

• 4

• 8

• 12

Which of these numbers could NOT be a common denominator for 1/6 and 5/18?

• 6

• 18

• 36

• 108