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og math 50

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by resilient » Sun Mar 09, 2008 2:35 pm
what is ratio of x:y:z?

1. z=1 and xy=32 (ins)
2. x/y=2 and z/y=1/4 suf

qa is b. but when testing numbers for st. 2 it is sufficient. BUt look what happens when you plug in 0 for x, the rest of the ratios follow as 0 also. this is different from the ratio relationships given from the other nubmers.
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Source: — Data Sufficiency |
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Re: og math 50

by Stuart@KaplanGMAT » Sun Mar 09, 2008 4:14 pm
Enginpasa1 wrote:what is ratio of x:y:z?

1. z=1 and xy=32 (ins)
2. x/y=2 and z/y=1/4 suf

qa is b. but when testing numbers for st. 2 it is sufficient. BUt look what happens when you plug in 0 for x, the rest of the ratios follow as 0 also. this is different from the ratio relationships given from the other nubmers.
(2) says that x/y=2 - so there's no possible way that x can be 0.
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HMMM

by resilient » Sun Mar 09, 2008 6:43 pm
i KEEP MISSING OUT AND FORGETTING ABOUT THE GIVEN CONSTRAINTS FOR PICKING NUMBERS.. DURING THE PRESSURE OF TIME, I FORGET IT ALL THE TIME.
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by gmatguy16 » Sun Mar 16, 2008 6:39 pm
what do you mean by ratio x:y:z...does it mean xz/y?
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