Home / Worksheets / Grade 5 / Math / Prime Factorization Practice

Prime Factorization Practice

A Grade 5 math worksheet focusing on prime factorization, factor trees, and identifying prime and composite numbers.

Grade 5 Math Number SensePrime Factorization
Use This Worksheet

Includes

Multiple ChoiceFill in the BlanksShort AnswerTrue / FalseWord Bank

Standards

CCSS.MATH.CONTENT.4.OA.B.4

Topics

mathgrade 5prime factorizationprime numberscomposite numbersfactor tree
7 sections · Free to use · Printable
← More Math worksheets for Grade 5

Prime Factorization Practice

Name:

Date:

Score:

Read each question carefully and provide the best answer. Remember to show your work for factor trees.

1. Which of the following is a prime number?

a

9

b

15

c

13

d

21

2. What are the prime factors of 12?

a

1, 2, 3, 4, 6, 12

b

2, 2, 3

c

3, 4

d

6, 2

3. A number that has exactly two factors, 1 and itself, is called a   number.

4. A number that has more than two factors is called a   number.

5. Draw a factor tree for the number 24. Write its prime factorization.

6. Draw a factor tree for the number 36. Write its prime factorization.

7. The number 1 is a prime number.

T

True

F

False

8. All even numbers are composite numbers, except for 2.

T

True

F

False

Use the words below to complete the sentences.

prime
composite
factors
factorization

9. The process of breaking down a number into its prime   is called prime  .

10. The number 7 is a   number, while 10 is a   number.