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

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

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

  4.   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. 4 inches on each side
    C. 8 inches on each side D. 12 inches on each side
    Hint

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



Glencoe
The McGraw-Hill Companies