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General DS Question

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by lagomez » Wed Jun 11, 2008 7:51 am
Let's assume the answer to a question is "D" (each statement alone)

Do statement 1 and statement 2 have to yield the same answer?

For example,

is x = 2?

1. x - 2 = 0 (the answer is yes)

2. x - 3 = 0 (the answer is no)

Could the answer choice be D because both statements yield definitive answers, however the answers are different?

Should the answers yield the same result? In this case should the answer be A.
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Source: — Data Sufficiency |
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by netigen » Wed Jun 11, 2008 8:25 am
In GMAT both A and B will yield the same results. In non GMAT questions such as MGMAT, Kaplan etc I have seen otherwise.
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by lagomez » Wed Jun 11, 2008 9:02 am
I noticed the same..the gmat book yielding the same result and the others a mix..

i just don't want to assume...i guess gmat would stay consistent (between official guide and actual exam)
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by Ian Stewart » Wed Jun 11, 2008 12:02 pm
Yes, on any real GMAT question, the two statements must be 'logically consistent'. You will never see two statements on Data Sufficiency like the following:

1) x = 2
2) x = 3

since it is impossible for both statements to be true, and therefore impossible to consider the two statements together- what would it mean for x to be equal to both 2 and 3 at the same time? Some questions produced by test prep companies do not observe this rule, however.
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by lagomez » Wed Jun 11, 2008 1:56 pm
okay..that makes sense too
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