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

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

  3.   George wants to resurface the table below with ceramic tiles. What is the largest square tile that he can use without having to cut any tiles?
   
    A. 6 inches on each side B. 12 inches on each side
    C. 8 inches on each side D. 4 inches on each side
    Hint

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

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



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