1.	Use the factor tree to write the prime factorization of 120.
		A.	2 × 2 × 3 × 5	B.	2 × 3 × 5
		C.	2 × 60	D.	2 × 2 × 2 × 3 × 5
		Hint
	2.	Which of the following numbers is composite?
		A.	1	B.	23
		C.	31	D.	9
		Hint
	3.	Write the prime factorization of 204.
		A.	2 × 2 × 3 × 17	B.	2 × 3 × 17
		C.	2 × 17	D.	6 × 17
		Hint
	4.	What are the prime factors of 810?
		A.	3, 5	B.	2, 5, 9
		C.	3, 4, 5	D.	2, 3, 5
		Hint
	5.	Write the prime factorization of 810.
		A.	32 × 4 × 5	B.	2 × 5 × 92
		C.	2 × 34 × 5	D.	2 ×3 × 5
		Hint