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Worksheet

Prime and Composite Numbers

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Show your work for each problem.

  1. 1.
    Which of these numbers is prime?
    1. a)
    2. b)
    3. c)
    4. d)
  2. 2.
    Which statement about the number is correct?
    1. a) is both prime and composite
    2. b) is a prime number
    3. c) is a composite number
    4. d) is neither prime nor composite
  3. 3.
    What is the smallest prime number?
    1. a)
    2. b)
    3. c)
    4. d)
  4. 4.
    Which of these numbers is composite?
    1. a)
    2. b)
    3. c)
    4. d)
  5. 5.
    Is prime or composite? Type 'prime' or 'composite'.
  6. 6.
    How many prime numbers are there between and ?
  7. 7.
    What is the next prime number after ?
  8. 8.
    How many factors does the number have?
  9. 9.
    Determine if is prime or composite.
  10. 10.
    Find all the factors of and determine if it's prime or composite.
  11. 11.
    List all prime numbers between and .
  12. 12.
    Which of the following statements is TRUE?
    1. a)All odd numbers are prime
    2. b)All prime numbers are odd
    3. c)All even numbers greater than are composite
    4. d)The number is prime
  13. 13.
    What is the sum of all prime numbers between and ?
  14. 14.
    Is prime or composite? Show your work.
  15. 15.
    Express as a product of prime factors.
Interactive lesson with step-by-step solutions and more practice (free): mathorio.com/en/learn/number-theory/factors/prime-composite