Prime Factors Worksheet
A Grade 8 math worksheet focusing on identifying and calculating prime factors of numbers.
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Prime Factors Worksheet
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work for full credit.
1. Which of the following is a prime number?
9
15
23
27
2. What are the prime factors of 12?
2, 3, 4
2, 2, 3
1, 2, 3, 6
6, 2
3. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. The number 1 is not considered a number.
4. The process of finding the prime numbers that multiply together to make the original number is called prime .
5. Find the prime factorization of 36 using a factor tree. Write your answer in exponential form.
6. Explain why 4 is not a prime number.
7. The number 2 is the only even prime number.
True
False
8. Every composite number can be expressed as a product of prime numbers.
True
False
9. Find the prime factorization of 60. You may use any method you prefer (e.g., factor tree or division method).
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