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IS 7 < SQRT N < 8? 1) N>50 2) N<60

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IS 7 < SQRT N < 8? 1) N>50 2) N<60 [#permalink]

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New post 17 Aug 2010, 08:45
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A
B
C
D
E

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  35% (medium)

Question Stats:

70% (01:19) correct 30% (00:16) wrong based on 20 sessions

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IS 7 < SQRT N < 8?

1) N>50
2) N<60
[Reveal] Spoiler: OA
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Re: GMAT - PAPER TEST QUESTION [#permalink]

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New post 17 Aug 2010, 08:54
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Re: GMAT - PAPER TEST QUESTION [#permalink]

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New post 17 Aug 2010, 22:28
Consider 1)+2) we have (50;60) interval.

_______49__50_______60____64

But what to do with highlighted parts?
Virtually we are asked if 49<N<64?
we miss 2 intervals: (49;50) and (60;64)
Having (50;60) we can't say that (49;64) is true.
Looks like (E).
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Re: GMAT - PAPER TEST QUESTION [#permalink]

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New post 18 Aug 2010, 04:19
ulm wrote:
Consider 1)+2) we have (50;60) interval.

_______49__50_______60____64

But what to do with highlighted parts?
Virtually we are asked if 49<N<64?
we miss 2 intervals: (49;50) and (60;64)
Having (50;60) we can't say that (49;64) is true.
Looks like (E).


OA for this question is C.

Question: is \(49<n<64\)? or is \(n\) in the range (49,64), not inclusive.

(1)+(2) \(50<n<60\) --> ANY \(n\) (any number) from this range IS in the range (49,64), so the answer to the question "is \(49<n<64\)" is YES.

Hope it's clear.
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Re: GMAT - PAPER TEST QUESTION [#permalink]

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New post 19 Aug 2010, 09:34
The more DS problems you practice, the easier it gets...

It's C here....
Re: GMAT - PAPER TEST QUESTION   [#permalink] 19 Aug 2010, 09:34
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