1.   Which of the following numbers is composite?
    A. 31 B. 9
    C. 23 D. 1
    Hint

  2.   Write the prime factorization of 204.
    A. 6 × 17 B. 2 × 2 × 3 × 17
    C. 2 × 3 × 17 D. 2 × 17
    Hint

  3.   Write the prime factorization of 1500.
    A. 22 × 3 × 53 B. 22 × 3 × 52 × 102
    C. 22 × 3 × 52 D. 2 × 3 × 5
    Hint

  4.   What are the prime factors of 400?
    A. 4, 10, 10 B. 2, 200
    C. 2, 5 D. 2, 4, 5
    Hint

  5.   Which of the following numbers is prime?
    A. 43 B. 75
    C. 57 D. 63
    Hint



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