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21 May 2019, 03:41
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
20% (00:06) correct
80%
(01:30)
wrong
based on 5
sessions
History
Date
Time
Result
Not Attempted Yet
x and y are both non-zero integers. Are x and y both less than zero?
1. \(\sqrt{x}*\sqrt{y}\) ≠ \(\sqrt{xy}\)
2. |x|*y=|y|*x
1. \(\sqrt{x}*\sqrt{y}\) ≠ \(\sqrt{xy}\)
2. |x|*y=|y|*x
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udaypratapsingh99
Joined: 12 Jan 2019
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Concentration: Strategy, Leadership
Schools: Fuqua '24 Harvard '24 LBS '24 NTU NUS Said '23 Ross '24 Sloan '24 Stanford '24 Tepper '24 Tuck '24 Wharton '24 Yale '24
GMAT 1: 660 Q47 V34
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Schools: Fuqua '24 Harvard '24 LBS '24 NTU NUS Said '23 Ross '24 Sloan '24 Stanford '24 Tepper '24 Tuck '24 Wharton '24 Yale '24
GMAT 1: 660 Q47 V34
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22 May 2019, 07:26
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nick1816
if only one is negative, using option 1, we can not say if it is equal or not ie we can neither say that it is equal nor that it is unequal. So I think A should be the answer.
BTW what is the source of the question ? and what is official solution?
22 May 2019, 09:21
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The question doesn't really make sense, because as soon as they write √x in Statement 1, they are presupposing that x is not negative, since that expression is nonsense if x is negative, or at least it is on the GMAT, since the GMAT never tests "imaginary numbers". So just by virtue of the fact that they write √x and √y in Statement 1, neither x nor y can be negative, but if that's the case, Statement 1 cannot be true, since (√x)(√y) = √(xy) is always true if x and y are zero or greater.
So since this question only makes sense if you consider imaginary numbers, which are out of the scope of the GMAT, it's potentially a confusing question to study.
So since this question only makes sense if you consider imaginary numbers, which are out of the scope of the GMAT, it's potentially a confusing question to study.
