LCM and GCD with Prime Factorisation

Find the Least Common Multiple (LCM) of 4 and 10.

• 2

• 20

• 40

• 10

Find the Greatest Common Factor (GCF) of 12 & 18.

• 3

• 4

• 2

• 6

What is the Least Common Multiple (LCM) of 8 & 12.

• 4

• 96

• 24

• 16

What is the Least Common Multiple (LCM) of 6 & 9?

• 3

• 6

• 9

• 18

What is the GCF of 42 and 24?

• 3

• 6

• 2

• 4

What is the Greatest Common Factor (GCF) of 8 and 12?

• 2

• 4

• 6

• 8

Find the Least Common Multiple (LCM) of 5 and 7.

• 35

• 70

• 12

• 14

The LCM of two numbers will always be bigger than both of the numbers.

• True

• False

If two numbers have a GCF of 1, you multiply them together to find the LCM.

• True

• False

Find the GCF of 15, 24, and 12

• 3

• 6

• 4

• 2