LCM and HCF Challenge

Find the LCM of 6 and 8.

• 18

• 14

• 24

• 12

Calculate the HCF of 12 and 18.

• 9

• 3

• 6

• 15

Perform prime factorization of 24.

• 2 x 12

• 2^3 x 3

• 2^4 x 3

• 2^2 x 6

Solve: If the LCM of two numbers is 36 and one number is 12, find the other number.

• 6

• 3

• 24

• 18

Identify the factors of 20.

• 4, 6, 8, 10, 12, 20

• 1, 2, 4, 5, 10, 20

• 1, 3, 6, 8, 15, 20

• 2, 3, 5, 7, 11, 20

What is the LCM of 15 and 25?

• 75

• 100

• 35

• 50

Determine the HCF of 36 and 48.

• 12

• 6

• 18

• 24

Break down 30 into its prime factors.

• 2 x 3 x 6

• 3 x 5 x 7

• 2 x 5 x 6

• 2 x 3 x 5

A garden has rows of 12 plants and 15 plants. How many plants are there in the longest row?

• 10

• 18

• 20

• 15

List the multiples of 9.

• 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ...

• 10

• 30

• 20