What are factor pairs?

• Numbers that add up to a target number

• Numbers that divide a target number

• Numbers that multiply to form a target number

• Numbers that are greater than a target number

Which of the following is a factor pair of 20?

• 3 and 7

• 4 and 5

• 8 and 2

• 6 and 3

What defines a composite number?

• A number with more than two factors

• A number with exactly two factors

• A number with only one factor

• A number that is a multiple of 10

Which number is a prime number?

• 15

• 20

• 17

• 21

Why is 21 considered a composite number?

• It has only one factor

• It is a prime number

• It has exactly two factors

• It has more than two factors