Factors and Multiples

4 is a factor of 98

• True

• False

What are the prime factors of 91

• 91

• 1 x 7 x 13

• 3 x 17

• 7 x 13

1 is a prime number

• True

• False

• I don't know

Which of these are factor pairs of 32?

• 1 and 32

• 2 and 18

• 4 and 8

• 4 and 9

47 is a composite number

• True

• False

A student states that 13, 26, 33, 45, 63, 93 are all composite numbers. Which of the numbers are not composite? (separate with 'and' if more than one number, e.g. 5 and 15)

Anne is listing all the multiples of 3 from 1 to 20: 12, 9, 18, 24, 27, 6, 15. What numbers is she missing? (separate with 'and' if more than one number, e.g. 5 and 15)

Is 36 a factor of 12?

• True

• False

What are the prime factors of 86?

• 2 x 43

• 2 x 3 x 14

• 2 x 2 x 24

• 1 x 2 x 43

Jim states that the numbers 3, 13, 24, 36, 99 consists of prime and composite numbers and they are all multiples of 3. Why is he incorrect?

• Jim is already correct

• They are all composite numbers

• They are all prime numbers

• 13 is not a multiple of 3

• 24 is not a multiple of 3