1.   What is the greatest common factor of 36 and 45?
    A. 36 B. 3
    C. 9 D. 45
    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. 16x2 B. 12x
    C. 4x2 D. 4x
    Hint

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

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



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