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25 Feb 2012, 07:34
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
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
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25 Feb 2012, 08:34
Kudos
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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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Hello from the GMAT Club BumpBot!
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Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
