Worksheet

Prime and Composite Numbers

Grade 4 - Math - On Level

NameDate

  1. What kind of number is 28: prime or composite?

    • neither prime nor composite
    • prime
    • composite
    • both prime and composite

  2. Which number is prime?

    • 42
    • 2
    • 6
    • 12

  3. Which number is composite?

    • 26
    • 13
    • 47
    • 7

  4. Which best explains why 29 is prime?

    • It has no factors at all.
    • It has factors other than 1 and itself.
    • It is a composite number.
    • Its only factors are 1 and itself.

  5. 16 is composite. Which number is a factor of 16, besides 1 and 16?

    • 6
    • 2
    • 15
    • 7

  6. What kind of number is 56: prime or composite?

    • prime
    • both prime and composite
    • composite
    • neither prime nor composite

  7. Which number is prime?

    • 59
    • 48
    • 42
    • 27

  8. Which number is composite?

    • 9
    • 29
    • 5
    • 41

  9. Which best explains why 9 is composite?

    • It has no factors at all.
    • It has factors other than 1 and itself.
    • Its only factors are 1 and itself.
    • It is a prime number.

  10. 10 is composite. Which number is a factor of 10, besides 1 and 10?

    • 17
    • 11
    • 14
    • 2
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