3-Chapter 19 (Multiples and Factors)

Which of the following is a factor of 12? Select all that apply.

• 12

• 2

• 24

• 3

Select all of the multiples of 8.

• 2

• 8

• 32

• 4

Select all of the prime numbers.

• 3

• 9

• 29

• 2

Select all of the composite numbers.

• 12

• 16

• 3

• 7

What are the factors of 15?

• 1, 2, 3, 5, 15

• 1, 3, 5, 15

• 1, 2, 3, 4, 5

• 1, 5, 10, 15

What are the factors of 24?

• 1, 2, 3, 4, 5, 6, 7, 8, 24

• 1, 3, 4, 6, 8, 10, 24

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 4, 8, 12, 24

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Which number is prime?

• 25

• 13

• 36

• 14

Which number is composite?

• 17
• 7
• 5
• 20