1.	Determine which number is not prime.
		A.	19	B.	61
		C.	57	D.	11
		Hint
	2.	Find the prime factorization of 126.
		A.	2 × 2 × 3 × 3 × 7	B.	2 × 3 × 3 × 7
		C.	2 × 3 × 3	D.	2 × 3 × 7
		Hint
	3.	64 is a multiple of which number?
		A.	16	B.	19
		C.	18	D.	17
		Hint
	4.	What are the prime factors of 120?
		A.	2, 2, 2, 3, 5	B.	2, 3, 5
		C.	2, 2, 30	D.	2, 60
		Hint
	5.	Are 12 and 25 relatively prime? Explain.
		A.	No; 12 and 25 are not prime numbers.
		B.	Yes; 12 and 25 have no common factors.
		C.	No; 12 has three prime factors.
		D.	Yes; 12 is even and 25 is odd.
		Hint