1.	Determine which number is not prime.
		A.	57	B.	19
		C.	61	D.	11
		Hint
	2.	Find the GCF of 24 and 54.
		A.	12	B.	3
		C.	2	D.	6
		Hint
	3.	Find the GCF of 16, 12, and 36.
		A.	3	B.	6
		C.	2	D.	4
		Hint
	4.	64 is a multiple of which number?
		A.	16	B.	18
		C.	17	D.	19
		Hint
	5.	Factor 144 completely.
		A.	4 · 4 · 9	B.	12 · 12
		C.	3 · 3 · 4 · 4	D.	2 · 2 · 2 · 2 · 3 · 3
		Hint