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Prime and Composite Numbers Worksheet

Identify and differentiate between prime and composite numbers for grade 4.

Grade 4 Math Number SenseNumber TheoryPrime and Composite Numbers
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Includes

Multiple ChoiceFill in the BlanksTrue / FalseShort AnswerCustom

Standards

CCSS.MATH.CONTENT.4.OA.B.4

Topics

mathgrade 4prime numberscomposite numbersnumber sense
7 sections · Free to use · Printable
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Prime and Composite Numbers

Name:

Date:

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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?

a

4

b

9

c

11

d

15

2. Which of the following is a composite number?

a

2

b

7

c

13

d

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.

T

True

F

False

7. The number 2 is the only even prime number.

T

True

F

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: