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What is the greatest value of X?

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Source: — Data Sufficiency |

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by Brent@GMATPrepNow » Thu Nov 21, 2013 8:27 am
claudayst wrote:1) x is an integer
2) 6<x<8

I don't understand why statement 2 is not sufficient. can someone explain why x has to be an integer to answer the question? thx
I'll answer your question with a statement and a question :-)

If statement 2 is sufficient, then it MUST provide enough information to definitively determine the value of x.
So, if 6 < x < 8, what is the greatest possible value of x?

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by Mormuse » Thu Nov 21, 2013 8:36 am
7,9...or 7,8 or anything not round between 6 and 8....I got it. thx :)))
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by Brent@GMATPrepNow » Thu Nov 21, 2013 8:39 am
claudayst wrote:7,9...or 7,8 or anything not round between 6 and 8....I got it. thx :)))
Nice work.
As soon as one says x equals 7.9 OR 7.8, it becomes clear that the statement is not sufficient :-)

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by Brent@GMATPrepNow » Thu Nov 21, 2013 9:18 am
I should point out to others reading this thread that this is a continuation of a discussion that began here: https://www.beatthegmat.com/what-is-the- ... tml#702821

In that other thread, I noted that this question tests a somewhat esoteric concept that the GMAT would never test.

So, you can safely ignore this question.

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