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

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

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

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

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



Glencoe
The McGraw-Hill Companies