1.   What is the greatest common factor of 22, 66, and 110?
    A. 66 B. 11
    C. 2 D. 22
    Hint

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

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

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

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



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