# Finding Factor Pairs (Grade 4)

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## Finding Factor Pairs

**Instructions:**
Factor pairs are two numbers that multiply together to equal a product. For example, in the equation 5 x 4 = 20, the factors are 5 and 4. 5 and 4 are a factor pair because they multiply together to equal 20.

The number 20 has two other factor pairs:

1 and 20 are a factor pair of 20 because 1 x 20 = 20.

2 and 10 are a factor pair of because 2 x 10 = 20.

Use your knowledge of factor pairs to answer the following questions.

1.

The number 81 has only the two factor pairs listed below.

1 and 81

9 and 9

1 and 81

9 and 9

- True
- False

2.

All of the factor pairs for the number 40 are listed below.

1 and 40

2 and 20

4 and 10

5 and 8

1 and 40

2 and 20

4 and 10

5 and 8

- True
- False

3.

Which of the following is a factor pair of 72?

- 8 and 9
- 12 and 7
- 36 and 36
- 9 and 7
- None of the above

4.

Which of the following is NOT a factor pair of 24?

- 6 and 4
- 12 and 2
- 8 and 4
- 3 and 8
- None of the above

5.

The American flag has 50 stars. Which shows a factor pair of the number 50?

- 2 and 25
- 10 and 40
- 20 and 30
- 100 and 150

6.

Select the TWO sets of factor pairs for the number of picnic tables shown.

Select TWO answers.

Select TWO answers.

- 1 and 8
- 3 and 5
- 4 and 2
- 8 and 16
- 16 and 24

7.

Select the TWO choices that are factor pairs for the number 62.

- 1 and 62
- 2 and 31
- 3 and 20
- 4 and 16
- 6 and 10

8.

How many factor pairs are there for the number 28?

- 1
- 2
- 3
- 4

9.

Select the THREE choices that are factor pairs for the number 36.

- 1 and 36
- 2 and 19
- 3 and 12
- 5 and 8
- 7 and 6
- 9 and 4

10.

Select the THREE choices that are factor pairs for the number 48.

- 1 and 48
- 2 and 26
- 3 and 16
- 4 and 14
- 6 and 8
- 9 and 7

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