Prime and Composite Numbers Worksheet
Explore prime and composite numbers with this comprehensive worksheet for 8th graders, featuring identification, classification, and reasoning questions.
Includes
Standards
Topics
Prime and Composite Numbers
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work where applicable.
1. Which of the following is a prime number?
51
57
61
65
2. All even numbers greater than 2 are:
Prime
Composite
Both prime and composite
Neither prime nor composite
3. A prime number has exactly factors.
4. The number 1 is neither prime nor .
5. A composite number has than two factors.
6. The number 2 is the only even prime number.
True
False
7. All odd numbers are prime numbers.
True
False
8. List all prime numbers between 20 and 40.
9. Explain why 49 is a composite number.
10. On the number line below, circle all the prime numbers and put a square around all the composite numbers between 1 and 10.
Match each number to its correct classification.
11. 13
a. Composite Number
12. 25
b. Prime Number
13. 37
c. Neither Prime nor Composite
14. 1
d. Even Composite Number
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