1.	Determine which number is not prime.
		A.	61	B.	19
		C.	57	D.	11
		Hint
	2.	Find the GCF of 24 and 54.
		A.	6	B.	12
		C.	2	D.	3
		Hint
	3.	Find the GCF of 16, 12, and 36.
		A.	6	B.	3
		C.	4	D.	2
		Hint
	4.	Which number is not a factor of 315?
		A.	5	B.	3
		C.	2	D.	9
		Hint
	5.	Are 12 and 25 relatively prime? Explain.
		A.	Yes; 12 is even and 25 is odd.
		B.	No; 12 has three prime factors.
		C.	No; 12 and 25 are not prime numbers.
		D.	Yes; 12 and 25 have no common factors.
		Hint