Prime and Composite Numbers Worksheet
Identify and differentiate between prime and composite numbers for grade 4.
Includes
Standards
Topics
Prime and Composite Numbers
Name:
Date:
Score:
Read each question carefully and follow the instructions. Remember, a prime number has exactly two factors (1 and itself), and a composite number has more than two factors.
1. Which of the following is a prime number?
4
9
11
15
2. Which of the following is a composite number?
2
7
13
16
3. A prime number has exactly factors.
4. A composite number has than two factors.
5. The number 1 is neither prime nor .
6. All even numbers are composite numbers.
True
False
7. The number 2 is the only even prime number.
True
False
8. List all the prime numbers between 10 and 20.
9. Explain why the number 25 is a composite number.
For each number, write 'Prime' or 'Composite' in the box.
10. 17:
11. 21:
12. 31:
13. 39:
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