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

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

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

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

  5.   Factor 18ab2.
    A. 2 · 3 · 3 · a · b B. 2 · 3 · 3 · a · b · b
    C. 22 · 3 · a · b · b D. 2 · 3 · a · b · b
    Hint



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