Worksheet

Prime and Composite Numbers

Grade 4 - Math - Challenge Me

NameDate

  1. What kind of number is 41: prime or composite?

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

  2. Which number is prime?

    • 62
    • 88
    • 85
    • 3

  3. Which number is composite?

    • 31
    • 11
    • 59
    • 62

  4. Which best explains why 52 is composite?

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

  5. 40 is composite. Which number is a factor of 40, besides 1 and 40?

    • 11
    • 15
    • 3
    • 4

  6. What kind of number is 82: prime or composite?

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

  7. Which number is prime?

    • 93
    • 45
    • 27
    • 83

  8. Which number is composite?

    • 11
    • 71
    • 40
    • 3

  9. Which best explains why 7 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.

  10. 81 is composite. Which number is a factor of 81, besides 1 and 81?

    • 9
    • 11
    • 12
    • 10
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