1.	A whole number that has exactly two factors, the number itself and 1, is called a ______.
		A.	prime number	B.	radical number
		C.	square number	D.	composite number
		Hint
	2.	Simplify the expression .
		A.	9	B.	13
		C.	12	D.	17
		Hint
	3.	Simplify the expression .
		A.	9	B.	8
		C.	27	D.	3
		Hint
	4.	Simplify the expression .
		A.	20	B.	12
		C.	14	D.	8
		Hint
	5.	Simplify .
		A.		B.
		C.		D.
		Hint