Prime Factors Worksheet
A Grade 7 math worksheet focusing on identifying prime numbers, finding prime factors, and using factor trees.
Includes
Standards
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Prime Factors Practice
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show your work where requested.
1. Which of the following is a prime number?
9
15
23
27
2. What is the smallest prime factor of 30?
1
2
3
5
3. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and .
4. The process of finding the set of prime numbers which multiply together to give the original number is called .
5. List all the prime numbers between 10 and 20.
6. Complete the factor tree for the number 48.
Write the prime factorization of 48:
7. The number 1 is a prime number.
True
False
8. Find the prime factorization of 72 using any method you prefer. Show your work.
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