1.   What are the prime factors of 120?
    A. 2, 2, 2, 3, 5 B. 2, 60
    C. 2, 2, 30 D. 2, 3, 5
    Hint

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

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

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

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



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