1.	Determine which number is not prime.
		A.	61	B.	19
		C.	11	D.	57
		Hint
	2.	Find the prime factorization of 126.
		A.	2 × 3 × 3	B.	2 × 2 × 3 × 3 × 7
		C.	2 × 3 × 3 × 7	D.	2 × 3 × 7
		Hint
	3.	Which number is not a factor of 315?
		A.	9	B.	2
		C.	3	D.	5
		Hint
	4.	Factor 144 completely.
		A.	4 · 4 · 9	B.	3 · 3 · 4 · 4
		C.	2 · 2 · 2 · 2 · 3 · 3	D.	12 · 12
		Hint
	5.	Are 12 and 25 relatively prime? Explain.
		A.	No; 12 and 25 are not prime numbers.
		B.	No; 12 has three prime factors.
		C.	Yes; 12 is even and 25 is odd.
		D.	Yes; 12 and 25 have no common factors.
		Hint