1.   Use the factor tree to write the prime factorization of 120.
    A. 2 × 2 × 3 × 5 B. 2 × 3 × 5
    C. 2 × 2 × 2 × 3 × 5 D. 2 × 60
    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.   What are the prime factors of 400?
    A. 2, 200 B. 4, 10, 10
    C. 2, 5 D. 2, 4, 5
    Hint

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

  5.   Factor 20ef.
    A. 2 · 10 · e · f B. 2 · 2 · 5 · e · f
    C. 4 · 5 · e · f D. 22 · e · f
    Hint



Glencoe
The McGraw-Hill Companies