LUANDATO wrote:If p and j are positive integers, is p + j even?
(1) p - j is odd
(2) p = j + 1
The OA is D.
Can any expert explain this DS questios please? I don't have it clear. Thanks.
(1) p - j is odd.
Since p - j = an odd integer, one of p and j is even and the other is odd. Both even or both odd will give an even integer.
Thus, p + j = sum of an even and an odd number = odd. The answer is No. Sufficient.
(2) p = j + 1
This implies that p and j are consecutive integers. One of the two consecutive integers would be even and the other would be odd.
Thus like Statement 1, p + j = sum of an even and an odd number = odd. The answer is No. Sufficient.
The correct answer:
D
Hope this helps!
-Jay
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