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GMAT Prep : DS

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GMAT Prep : DS [#permalink] New post 12 Aug 2006, 17:11
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Please explain.
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 [#permalink] New post 12 Aug 2006, 17:14
I think, it is C

(A) defines the series & (B) gives a value for one of the member
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Re: GMAT Prep : DS [#permalink] New post 13 Aug 2006, 15:02
techieGuy wrote:
Please explain.



(1) x(2) = x(1)/2
x(3) = x(2)/2
x(4) = x(3)/2
x(5) = x(4)/2

Not suff
BCE

(2)
x(5) = x(4)/x(4) +1
Not Suff
CE

(1) & (2)
x(4)/2 = x(4)/x(4) +1
solving x(4) = 0 or 1
I would have jumped to conclusions that x(1) could take 2 values based on x(4) being 0 or 1
But since Q stem says +ve values
X(4) = 1 --> x(1) = 8

Hence C

Heman
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 [#permalink] New post 13 Aug 2006, 15:12
heman is right on ! thanks for such a clear explaination....
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 [#permalink] New post 14 Aug 2006, 02:30
C

1) Clearly not suff
2) Not suff either.

Together

x5 = x4/x4+1
x4/2 = x4/x4+1
x4+1 = 2
x4=1
x3/2=1
x2/4=1
x1/8=1
x1=8
  [#permalink] 14 Aug 2006, 02:30
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