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

  2.   Which of the following numbers is prime?
    A. 5 B. 15
    C. 9 D. 1
    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.   Write the prime factorization of 810.
    A. 2 × 5 × 92 B. 2 ×3 × 5
    C. 32 × 4 × 5 D. 2 × 34 × 5
    Hint

  5.   Factor 8x2.
    A. 2 · 4 · x · x B. 2 · 2 · 2 · x · x
    C. 2 · 2 · 2 · x D. 8 · x
    Hint



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