1.	Find the GCF of 28 and 34.
		A.	2	B.	1
		C.	4	D.	7
		Hint
	2.	Find the GCF of 16, 12, and 36.
		A.	6	B.	4
		C.	3	D.	2
		Hint
	3.	Look at the factors of 24 and 16. What is the greatest common factor? factors of 16: 1, 2, 4, 8, 16 factors of 24: 1, 2, 3, 4, 6, 8, 12, 24
		A.	16	B.	8
		C.	2	D.	4
		Hint
	4.	Find the GCF of 38 and 49.
		A.	2	B.	3
		C.	4	D.	1
		Hint
	5.	Which two numbers have a GCF of 7?
		A.	25, 45	B.	21, 63
		C.	7, 17	D.	35, 126
		Hint