Prime Factorization Practice

A worksheet for 6th graders to practice finding the prime factorization of numbers using factor trees and identifying prime numbers.

Grade 6 Math Number SensePrime Factorization

Use This Worksheet

Includes

2 Short AnswerFill in the BlanksMultiple ChoiceTrue / False

Standards

CCSS.MATH.CONTENT.6.NS.B.4

Topics

mathgrade 6prime factorizationnumber sensefactors

7 sections · Free to use · Printable

Name:

Date:

Score:

Read each question carefully and provide the best answer. Show your work where requested.

1. Is the number 23 prime or composite? Explain your reasoning.

2. Is the number 51 prime or composite? Explain your reasoning.

Complete the factor tree for 24 and write its prime factorization.

The prime factorization of 24 is:

4. Draw a factor tree for the number 36 and write its prime factorization.

The prime factorization of 36 is:

5. Which of the following is the prime factorization of 60?

2 x 3 x 10

2² x 3 x 5

2 x 2 x 15

6 x 10

6. The number 1 is a prime number.

True

False

7. All even numbers are composite numbers.

True

False

8. Find the prime factorization of 100. Show your work.