1.   Find the greatest common factor of 168 and 288.
    A. 24 B. 48
    C. 36 D. 2
    Hint

  2.   What is the greatest common factor of 45, 75, and 135?
    A. 9 B. 25
    C. 15 D. 5
    Hint

  3.   Find the greatest common factor of 64ab3c2 and 48a2b2c.
    A. 8ab3c B. 8a2b2c2
    C. 16ab2c D. 16abc
    Hint

  4.   Factor 7x + 21.
    A. 7(x + 3) B. 7(x + 21)
    C. 7x(1 + 21) D. x(7 + 21)
    Hint

  5.   Factor 15x3 - 5x2.
    A. 5x(3x2 - x) B. x2 (15x – 5)
    C. 5x2 (3x – 1) D. x(15x2 - 5x)
    Hint



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