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

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

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

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

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



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