1.   Based on the factor trees, what is the greatest common factor of 8 and 20?
    A. 20 B. 8
    C. 4 D. 2
    Hint

  2.   What is the greatest common factor of 16x2 and 12x?
    A. 16x2 B. 12x
    C. 4x D. 4x2
    Hint

  3.   What is the greatest common factor of 36, 54, and 90.
    A. 18 B. 6
    C. 36 D. 9
    Hint

  4.   What is the greatest common factor of 20x2 and 32x3?
    A. 8x3 B. 4x2
    C. 4x D. 8x
    Hint

  5.   What is the greatest common factor of 14p2q and 42p3q2?
    A. 14p2q B. 7p2q2
    C. 7pq D. 14pq
    Hint



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