1.   Use the factor tree to write the prime factorization of 120.
    A. 2 × 60 B. 2 × 3 × 5
    C. 2 × 2 × 2 × 3 × 5 D. 2 × 2 × 3 × 5
    Hint

  2.   What are the prime factors of 120?
    A. 2, 60 B. 2, 2, 2, 3, 5
    C. 2, 3, 5 D. 2, 2, 30
    Hint

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

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

  5.   What are the prime factors of 810?
    A. 3, 4, 5 B. 3, 5
    C. 2, 3, 5 D. 2, 5, 9
    Hint



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