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25 Feb 2012, 07:34
Kudos
Bookmarks
D
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:
61% (01:35) correct
39%
(01:21)
wrong
based on 23
sessions
History
Date
Time
Result
Not Attempted Yet
If x is not equal to y and if √x = y, what is the value of y3 ?
(1) x = yx
(2) x3 = 8
My ans is B but the solution said it is D .
Please explain .
(1) x = yx
(2) x3 = 8
My ans is B but the solution said it is D .
Please explain .
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
25 Feb 2012, 08:34
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verycoolguy33
There is something wrong with this question.
If x is not equal to y and if √x = y, what is the value of y^3 ?
Given: \(x\neq{y}\) and \(\sqrt{x}=y\).
(1) x = yx --> \(x=x*\sqrt{x}=\) --> \(x(\sqrt{x}-1)=0\). Now, from this, either \(x=0\) and in this case \(y=0\) too, which contradicts given condition that \(x\neq{y}\) or \(x=1\) and in this case \(y=1\) too, which also contradicts the same condition that \(x\neq{y}\).
On the GMAT, a statement never contradicts the stem.
(2) x^3 = 8 --> \(x=2\). This on the other hand contradicts statement (1) which say that \(x=0\) or \(x=1\).
On the GMAT, two data sufficiency statements always provide TRUE information and these statements never contradict each other.
So, to summarize: this is a flawed question, don't study it.
I'll leave a topic open in case you have any comment and then lock/delete it.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
09 Jan 2024, 05:14
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A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
