1.	Find the greatest common factor of 168 and 288.
		A.	48	B.	2
		C.	24	D.	36
		Hint
	2.	What is the greatest common factor of 45, 75, and 135?
		A.	25	B.	15
		C.	9	D.	5
		Hint
	3.	Find the GCF of 17r4s4 and 23rs4.
		A.	17rs4	B.	r4s4
		C.	rs	D.	rs4
		Hint
	4.	Factor 7x + 21.
		A.	7(x + 21)	B.	x(7 + 21)
		C.	7(x + 3)	D.	7x(1 + 21)
		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.	3 by 8x3 + 6x3
		B.	2x4by 12 + 9x
		C.	6x3 by 4x + 3
		D.	24x3 by x + 18
		Hint