Factors, Multiples and Primes

Which of these is NOT a factor of 20?

• 10

• 2

• 5

• 3

What are all the factors of 20?

Which of these is a multiple of 20?

• 10

• 5

• 40

• 50

Which of these is a multiple of 200?

• 50

• 400

• 100

• 500

Select the factors 100

• 10

• 2

• 75

• 50

Show all of the factors for 100

1 is a prime number.

• True

• False

Explain why 1 is not a prime number

Which of these is not a prime number?

• 3

• 9

• 11

• 17

Which is the only even prime number?

• 1

• 2

• 4

• 10