Mastering L.C.M and H.C.F

What is the L.C.M of 12 and 15?

• 75

• 60

• 45

• 30

Calculate the H.C.F of 24 and 36.

• 6

• 24

• 18

• 12

Find the prime factors of 60.

• 4, 6, 10

• 3, 15, 20

• 1, 2, 30

• 2, 3, 5

What is the L.C.M of 8, 12, and 16?

• 36

• 60

• 48

• 24

Determine the H.C.F of 45 and 75.

• 45

• 60

• 15

• 30

List the prime factors of 84.

• 1, 12, 14

• 2, 4, 6

• [2, 3, 7]

• 3, 5, 11

If the L.C.M of two numbers is 60 and their H.C.F is 12, what are the numbers?

• 12 and 30

• 15 and 45

• 12 and 60

• 20 and 40

Solve: The L.C.M of 9 and 21 is what?

• 63

• 54

• 45

• 27

What is the H.C.F of 18, 30, and 42?

• 12

• 9

• 6

• 3

Find the prime factors of 100.

• 1, 100

• 2, 5

• 4, 25

• 3, 10