1.   Find the greatest common factor of 168 and 288.
    A. 36 B. 48
    C. 24 D. 2
    Hint
  2.   What is the greatest common factor of 45, 75, and 135?
    A. 9 B. 15
    C. 25 D. 5
    Hint
  3.   What is the greatest common factor of 18mn2, 54m4, and 80n3?
    A. 2mn2 B. 2
    C. 18m2n3 D. 9mn
    Hint
  4.   Find the GCF of 17r4s4 and 23rs4.
    A. rs B. r4s4
    C. 17rs4 D. rs4
    Hint
  5.   The area of a rectangle can be written by the expression 24x4+ 18x3. Find a set of possible dimensions for this rectangle.
    A. 6x3 by 4x + 3
    B. 24x3 by x + 18
    C. 2x4by 12 + 9x
    D. 3 by 8x3 + 6x3
    Hint

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