1.	To what set of numbers does belong?
		A.	integers	B.	irrationals
		C.	whole numbers	D.	rationals
		Hint
	2.	Simplify .
		A.		B.
		C.		D.
		Hint
	3.	Simplify
		A.	72	B.
		C.		D.
		Hint
	4.	Simplify:
		A.	no real roots	B.	-16
		C.		D.	16
		Hint
	5.	Find the result of
		A.		B.
		C.		D.
		Hint