1.   What is the greatest common factor of 25a2b and 5ab2?
    A. 5 B. 5a2b2
    C. 5ab2 D. 5ab
    Hint

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

  3.   What is the greatest common factor of 64 and 40?
    A. 8 B. 20
    C. 4 D. 2
    Hint

  4.   What is the greatest common factor of 39 and 18?
    A. 6 B. 9
    C. 3 D. 13
    Hint

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



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