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by soluja2003 » Wed Jan 30, 2008 10:46 am
If xy= -18 is x less than y?

(1) x < 0

(2) y< 10

I thought since this is a yes or no question that (1) was suff since it means that x will always be a negative number and in order to get a negative 18 y would have to be positive. Thanks for your help!
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Source: — Data Sufficiency |
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by cris » Wed Jan 30, 2008 2:15 pm
Isnt the answer A??
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Re: DS Question

by Stuart@KaplanGMAT » Wed Jan 30, 2008 6:14 pm
soluja2003 wrote:If xy= -18 is x less than y?

(1) x < 0

(2) y< 10

I thought since this is a yes or no question that (1) was suff since it means that x will always be a negative number and in order to get a negative 18 y would have to be positive. Thanks for your help!
(1) is sufficient, for exactly the reason you gave.

(2) is insufficient, because we have no clue if y is + or - (for example, we could choose y=2 and x= -9 or x=2 and y= -9)

(A) is correct.
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