1.	Determine which number is not prime.
		A.	19	B.	61
		C.	11	D.	57
		Hint
	2.	Find the prime factorization of 126.
		A.	2 × 3 × 3 × 7	B.	2 × 2 × 3 × 3 × 7
		C.	2 × 3 × 7	D.	2 × 3 × 3
		Hint
	3.	64 is a multiple of which number?
		A.	16	B.	19
		C.	17	D.	18
		Hint
	4.	What are the prime factors of 120?
		A.	2, 60	B.	2, 2, 2, 3, 5
		C.	2, 3, 5	D.	2, 2, 30
		Hint
	5.	Find the least common multiple of 6 and 15.
		A.	60	B.	3
		C.	15	D.	30
		Hint