Factors Multiples and Primes

Which number is a multiple of 18?

• 2

• 9

• 36

• 24

Find the LCM of 32 and 40.

• 1080

• 250

• 160

• 204

What is the only multiple of 11 between 30 and 40?

• 31

• 32

• 33

• 34

The factors of 15 are...

• 1, 3, 5

• 0, 5, 3

• 1, 15

• 1, 3, 5, 15

11 is a prime number...

• True

• False

Composite numbers have more than two factors. For example, the number 10 is a composite number because it has factors 1, 2, 5 and 10...

• True

• False

The Highest Common Factor (HCF) of 48 and 64 is:

• 14

• 8

• 4

• 16

9 is Prime number

• False

• True

What is the lowest common multiple (LCM) of 4 and 5?

• 20

• 10

• 15

• 25

What is a common factor of 8 and 12?

• 4

• 6

• 10

• 2