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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0

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CEO
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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 [#permalink] New post 09 Oct 2003, 01:05
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A
B
C
D
E

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What is the value of x?

(1) x^2 / 3 = x / 81

(2) x>0

explain your answer
SVP
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 [#permalink] New post 09 Oct 2003, 02:35
(1) X^2=X/27, X=27 or X=0 NOT SUFF
(2) NOT SUFF

together X=27
C
CEO
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 [#permalink] New post 09 Oct 2003, 03:06
stolyar wrote:
(1) X^2=X/27, X=27 or X=0 NOT SUFF
(2) NOT SUFF

together X=27
C



I got C too.

I think kaplan got it wrong !

Thanks
Praetorian
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 [#permalink] New post 09 Oct 2003, 03:13
IT HAPPENS SOMETIMES. KAPLAN'S PEOPLE ARE NO GODS. NEITHER ARE WE.
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 [#permalink] New post 09 Oct 2003, 06:20
praetorian123 wrote:
stolyar wrote:
(1) X^2=X/27, X=27 or X=0 NOT SUFF
(2) NOT SUFF

together X=27
C



I got C too.

I think kaplan got it wrong !

Thanks
Praetorian



mistake:
x^2 = x/27 therefore x = 27

actually:
x = 1/27
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 [#permalink] New post 09 Oct 2003, 06:58
I do agree with wonder_gmat.

Why do we need (2) if statement (1) gives us a clear and unambiguous answer that x=1/27

Or, maybe, we (me and wonder_gmat) read the question incorrectly?
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 [#permalink] New post 09 Oct 2003, 07:17
yes, I mismatched 27 and 1/27, but the answer stays the same C.

(1) X=0 or X=1/27. You cannot simply ignore 0. NOT SUFF
(2) not suff again

combine: a zero is out, leaving a unique 1/27.

Therefore, it cannot be A. It is C.
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 [#permalink] New post 09 Oct 2003, 07:48
stolyar

You've convinced me :beer

I agree with you that the x can be 0 but the answer is extremelly implicit.

I hate those kind of questions :arh . Kaplan and ETC are guileful!
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  [#permalink] 09 Oct 2003, 07:48
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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0

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