Factor Pairs

Solve: If the factor pairs of a number are (1, 7), what is the number?

• 7

• 10

• 8

• 6

Which of the following is a factor pair of 36?

• 4 and 9

• 5 and 7

• 6 and 6

• Both A and C

What are the factor pairs of 18?

• 1 and 18, 2 and 9

• 1 and 17, 3 and 6

• 2 and 9, 3 and 6

• Both A and C

How many factor pairs does the number 24 have?

• 4

• 12

• 10

• 8

Calculate the product of the factor pairs of 10.

• 5

• 50

• 100

• 20

If a number has 4 factor pairs, how many factors does it have?

• 12

• 8

• 10

• 6

List all the factor pairs of 20.

• (3, 7)

• (10, 2)

• (1, 20), (2, 10), (4, 5)

• (6, 2)

Explain how you can use factor pairs to find the prime factorization of a number.

• Prime factorization can be determined by adding factor pairs together

• Factor pairs are irrelevant in finding prime factorization

• You can use factor pairs to find the prime factorization of a number by continuously dividing the number by its smallest prime factors until only prime numbers are left.

• Factor pairs are only used for composite numbers, not prime numbers

Find the sum of the factor pairs of 15.

• 18

• 24

• 30

• 12

If a number has 5 factor pairs, what is the number?

• 16

• 12

• 25

• 20