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Re: 0 < xy [#permalink]
I've tried for x=1, y=2, x=1, y=3, and x=-1, y=-2, and getting A as the answer. What to do now? How can I chose sensible numbers?
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Re: 0 < xy [#permalink]
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gremather wrote:
I've tried for x=1, y=2, x=1, y=3, and x=-1, y=-2, and getting A as the answer. What to do now? How can I chose sensible numbers?


-2,-1,0,1,2 these are good numers to pick.

Of course, if the question does not specify whether they are integers -1/2, 1/2 should be included in your trial and error test.

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Re: 0 < xy [#permalink]
1
It was a good one.
Answer is Choice D.

Originally posted by GREMasterBlaster on 01 Mar 2018, 11:59.
Last edited by GREMasterBlaster on 04 Mar 2018, 01:40, edited 1 time in total.
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Re: 0 < xy [#permalink]
i guess this is a good one
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Re: 0 < xy [#permalink]
This is actually time consuming, is it an official GRE question?
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Re: 0 < xy [#permalink]
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No. It is from Princeton.

Just take a look at the tag source of the question and you do know where it comes from.

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Re: 0 < xy [#permalink]
Carcass wrote:
No. It is from Princeton.

Just take a look at the tag source of the question and you do know where it comes from.

Regards

But its a nice question , after a few step, you end up with xy in quantity a and x-y in quantity b and as we are said, xy is less than 0 and x-y could be anything, hence answer is d.
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Re: 0 < xy [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: 0 < xy [#permalink]
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