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Praetorian
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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 02:05
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What is the value of x?

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

(2) x>0

explain your answer



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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 03:35
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(1) X^2=X/27, X=27 or X=0 NOT SUFF
(2) NOT SUFF

together X=27
C
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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 04:06
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stolyar
(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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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 04:13
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IT HAPPENS SOMETIMES. KAPLAN'S PEOPLE ARE NO GODS. NEITHER ARE WE.
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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 07:20
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praetorian123
stolyar
(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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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 07:58
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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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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 08:17
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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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What is the value of x? (1) x^2 / 3 = x / 81 (2) x>0 09 Oct 2003, 08:48
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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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