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

  2.   Which of the following numbers is prime?
    A. 1 B. 9
    C. 5 D. 15
    Hint

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

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

  5.   Write the prime factorization of 810.
    A. 2 × 5 × 92 B. 2 ×3 × 5
    C. 32 × 4 × 5 D. 2 × 34 × 5
    Hint