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Re: PS: Complicated Problem! Must Try! [#permalink]

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15 Dec 2005, 23:05

vivek123 wrote:

This is a problem a friend of mine gave me, who just wrote GMAT!

Cat has 1/2 the money that Dog has & 1/3 the money that Monkey has. What proportion of total money Cat has?

Beware, 1/6 is not in the answer choice...how?

I am not sure if my approach is good
Cat=1/2d+1/3m
picking numbers if m=3 and d=2 cat=2 ratio is 2/7
m=6 and d=4 same
The trick IMHO in wordings Cat has 1/2 the money that Dog has & 1/3 the money that Monkey has.Does this mean that Cat has 1/2of dogs money or 1/3 of monkey's?
My opinion that it says 1/2d+1/3m

Re: PS: Complicated Problem! Must Try! [#permalink]

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16 Dec 2005, 10:40

Yurik79 wrote:

I am not sure if my approach is good Cat=1/2d+1/3m picking numbers if m=3 and d=2 cat=2 ratio is 2/7 m=6 and d=4 same The trick IMHO in wordings Cat has 1/2 the money that Dog has & 1/3 the money that Monkey has.Does this mean that Cat has 1/2of dogs money or 1/3 of monkey's? My opinion that it says 1/2d+1/3m

what if the numbers are 12 and 15.. I dont think this going to workk then..
_________________

Success is my only option, failure is not -- Eminem

Re: PS: Complicated Problem! Must Try! [#permalink]

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16 Dec 2005, 11:56

krisrini wrote:

vivek123 wrote:

This is a problem a friend of mine gave me, who just wrote GMAT!

Cat has 1/2 the money that Dog has & 1/3 the money that Monkey has. What proportion of total money Cat has?

Beware, 1/6 is not in the answer choice...how?

I get 2/7.

Let Dog be 6, and monkey be 9. So cat = 1/2(6) + 1/3(9) = 6 Total = 6 - cat + 6 - dog + 9 - Monkey = 21 Cat/Total = 6/21 = 2/7

Good point... that is the case if CAT has two separate amounts. If it has 1/2 of dog's PLUS 1/3 of monkey's, and NOT 1/2 of dog's, which is also 1/3 of monkey's.
In that case you are right.

The question stem is flawed, as BG said, 1/6 as well as 2/7 is right depending on how you understand the question stem. I don't think it is a real GMAT question, because normally the GMAC formulates the questions crystal clear.

hence cat as proportion of total = 11/39 is not 2/7?

I probably did something stupid

IMHO your approach is good))Same as mine.Try to solve every proble, on this forum!It is very useful!I ve improved my quant section just solving problems here)

thanks... I must say the quant questions are difficult and I'm stressing over the GMAT. I write mid Jan and I only started studying a couple of weeks ago.
Cheers