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general q: If the answer for a DS question is "D"...

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general q: If the answer for a DS question is "D"... [#permalink] New post 24 Jul 2011, 11:54
Do they have to be the same answer?

For example if the question is asking x = ?, and (1) gets you to the conclusion that x=1 and (2) gets you to the conclusion that x=2...

Having done a bunch of DS problems, I've come across a couple questions were (1) and (2) get me to different answers and the answer was "D". (Usually they get me to the same answer) Was wondering if there are any test-taking applications of this or if anyone had any insight in this area.
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Re: general q: If the answer for a DS question is "D"... [#permalink] New post 24 Jul 2011, 12:30
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stompy wrote:
Do they have to be the same answer?

For example if the question is asking x = ?, and (1) gets you to the conclusion that x=1 and (2) gets you to the conclusion that x=2...

Having done a bunch of DS problems, I've come across a couple questions were (1) and (2) get me to different answers and the answer was "D". (Usually they get me to the same answer) Was wondering if there are any test-taking applications of this or if anyone had any insight in this area.



What you are saying is absolutely impossible. In DS question two statements cannot contradict each other. if they will then the whole question will become illogical. if question is asking x ? then statement (1) and statement (2) will not give conclusive different answers. Means if statement 1 provides conclusive answer that x= 10 then statement (2) cannot say conclusively that x =14. statement (2) however can provide answer that x can be 10 and 14 but not a conclusive different definite answer. usually quadratic equation questions or inequality questions contain 2 different values of x and the answer to such question depends upon constrains set by question. sometimes question stem will set range for x , such as if x is even or if x is positive or if x < 14 etc then x ? In such cases answer completely depends upon constrains set by the question and still if no conclusive value is generated then answer is E.
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Re: general q: If the answer for a DS question is "D"... [#permalink] New post 24 Jul 2011, 13:58
Aj85 is absolutely correct here. It is "not" possible on a GMAT DS question to lead to multiple correct answers for the 2 statements on a value question (such as x=?). This might be the case with some material you are using for practice but this will never occur on a GMAT problem.
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Re: general q: If the answer for a DS question is "D"... [#permalink] New post 24 Jul 2011, 14:18
Ok, if what you guys are saying is correct, then there is potential for a DS trick here. (for certain problems of course) If you know (1) is enough and you know what the answer is from (1), this may help you in figuring out if (2) is enough. (since you know what the answer should be)

Is this a valid strategy?
Re: general q: If the answer for a DS question is "D"...   [#permalink] 24 Jul 2011, 14:18
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