Grade 5 Questions with Answers on Prime and Composite Numbers

Grade 5 math questions on prime and composite numbersanswers are presented.



  1. True or False: All prime numbers are odd.


  2. What is the smallest prime number?


  3. True or False: All even numbers greater than 2 are composite.


  4. Which number is prime?

    1. 12
    2. 6
    3. 9
    4. 7


  5. Which number is composite?

    1. 21
    2. 2
    3. 13
    4. 11


  6. Which number is prime?

    1. 27
    2. 31
    3. 1
    4. 39


  7. Which number is composite?

    1. 1
    2. 57
    3. 17
    4. 41


  8. Which number is neither prime nor composite?

    1. 15
    2. 41
    3. 18
    4. 1


  9. Which is prime and which is composite?

    1. 16
    2. 24
    3. 29
    4. 30
    5. 31
    6. 33
    7. 81
    8. 97
    9. 100
    10. 101


  10. List all prime numbers from 2 to 31.


Answers to the Above Questions

  1. False , 2 is even and prime.

  2. 2

  3. True , because all even numbers are divisible by 2.

  4. 7

  5. 21

  6. 31

  7. 57

  8. 1


  9. prime: 29 , 31 , 97 , 101

    composite: 16 , 24 , 30 , 33 , 81 , 100

  10. 2 , 3 , 5 , 7 , 11 , 13 , 17 , 19 , 23 , 29 , 31

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Updated: 14 March 2009 (A Dendane)