1.	Which values are a counterexample to the given statement? If x + y = an even number, then x is even and y is even.
		A.	x = 12, y = 6	B.	x = 10, y = 9
		C.	x = 7, y = 12	D.	x = 21, y = 3
		Hint
	2.	Identify the conclusion in the following algebraic statement: If a = 3, then 2a + 1 = 7.
		A.	2a + 1	B.	2a + 1 = 7
		C.	2a	D.	a = 3
		Hint
	3.	A counterexample disproves a conditional when ________ .
		A.	the hypothesis is false and the conclusion is false
		B.	the hypothesis is true and the conclusion is false
		C.	the hypothesis is true and the conclusion is true
		D.	the hypothesis is false and there is no valid conclusion
		Hint
	4.	Identify the conclusion in the following statement: If 13b + 12 = 77, then b = 5.
		A.	13b + 12	B.	b = 5
		C.	13b + 12 = 17	D.	b
		Hint
	5.	Which values are a counterexample to the given statement? If x × y = 0, then x must be 0.
		A.	x = -1, y = 1	B.	x = 0, y = 0
		C.	x = 5, y = 0	D.	x = 0, y = 1
		Hint