1.	Tell which model shows a composite number.
		A.		B.
		C.		D.
		Hint
	2.	Which number is prime?
		A.	17	B.	15
		C.	20	D.	16
		Hint
	3.	Which number is prime?
		A.	40	B.	39
		C.	32	D.	23
		Hint
	4.	Which number is composite?
		A.	43	B.	1
		C.	19	D.	21
		Hint
	5.	Write the prime factorization of 28.
		A.	2 × 2 × 7	B.	2 × 2 × 2 × 7
		C.	2 × 2 × 7 × 28	D.	4 × 7
		Hint