1.	Which number is not a prime number?
		A.	51	B.	7
		C.	11	D.	31
		Hint
	2.	Which number is not a composite number?
		A.	111	B.	29
		C.	27	D.	63
		Hint
	3.	The product of the prime factors common to two integers is called the _____.
		A.	least common denominator	B.	greatest common factor
		C.	composite term	D.	prime factorization
		Hint
	4.	Find the GCF of 30, 45, and 75.
		A.	15	B.	5
		C.	10	D.	6
		Hint
	5.	Which factor tree best represents 468?
		A.		B.
		C.		D.
		Hint