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LCD confusion

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by baratometer » Thu Nov 01, 2007 8:19 pm
No...not the hallucinagen. I got this question on a GMATprep and must be missing something.

"In the fraction X/Y where X,Y are positive integers, what is the value of Y?"

1. The least common denominator of X/Y and 1/3 is 6

2. X=1

Answer was E. But I thought it should be A (doesn't Y have to be 2???).

TIA...
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Source: — Data Sufficiency |
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by mschling52 » Fri Nov 02, 2007 4:40 am
I think given Statement (1) that Y could also be 6....i.e. the LCD of 1/6 and 1/3 would also be 6
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by ricaototti » Thu Aug 28, 2008 10:22 pm
NOBODY WILL HELP US??? PLEASEE!!!!!!!!!!!!
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Re: LCD confusion

by parallel_chase » Fri Aug 29, 2008 3:24 am
baratometer wrote:No...not the hallucinagen. I got this question on a GMATprep and must be missing something.

"In the fraction X/Y where X,Y are positive integers, what is the value of Y?"

1. The least common denominator of X/Y and 1/3 is 6

2. X=1

Answer was E. But I thought it should be A (doesn't Y have to be 2???).

TIA...

Statement I

LCM of x/y and 1/3 is 6

y could be 6
y could be 2


Insufficient.

Statement II

x=1, y could be anything

Insufficient.

Combining I & II

x=1

still y could be 2 or 6 or anything else.

Insufficient.

Hence E is the answer.

Hope this helps.
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