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 = 7, y = 12	B.	x = 12, y = 6
		C.	x = 10, y = 9	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 = 7	B.	2a
		C.	2a + 1	D.	a = 3
		Hint
	3.	Which values are a counterexample to the given statement? If x · y = a decimal, then neither x nor y is a whole number.
		A.	x = 7.1, y = 2.2	B.	x = 1.75, y = 0.9
		C.	x = 0.3, y = 0.2	D.	x = 1, y = 0.5
		Hint
	4.	Which values of x and y are counterexamples to the given statement? If x – y = an even number, then both x and y are even numbers.
		A.	x = 12, y = 4	B.	x = 22, y = 20
		C.	x = 19, y = 13	D.	x = 15, y = 8
		Hint
	5.	Identify the hypothesis in the following statement: If x – 3 = 9, then x = 12.
		A.	x – 3 = 9	B.	x = 12
		C.	x – 3	D.	x
		Hint