If x2 is an even integer, which of the following must be true?
- x is an odd integer
- x is an even integer
- x3 is an odd integer
(A) I only
(B) II only
(C) III only
(D) None
(E) II and III only
Explanation (highlight the text below to see the answer):
The answer is casino online D.
Suppose x2 = 2. Then x = √2 or x = -√2. √2 is not an integer, hence I and II are not true. (√2)3 = 2√2, which is not an integer either. As all statements claim x to be an integer, none of them must be true, and the answer is D. SK0-003
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