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Inequality Problem

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srikanth.devidi
 Post subject: Inequality Problem
 Post Posted: Sun Oct 16, 2011 3:03 pm 
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Course Students


Posts: 5
Is x > y?

1) xy > y^2
2) x(y^2) > y^3
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chawla_vinu
 Post subject: Re: Inequality Problem
 Post Posted: Sun Oct 16, 2011 11:39 pm 
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Students


Posts: 2
srikanth.devidi wrote:
Is x > y?

1) xy > y^2
2) x(y^2) > y^3


1) xy>y^2
x=5, y=4, then 20>16 (true)-- x>y
x=-5, y=-4, then 20> 16 (true)--- x<y

So A and D are out

2) x(y^2)>y^3
x=5, y=4, then 80>64 (true)--- x>y
x=5, y=-4, then 80>-64 (true)--- x>y
x=-3,y=-4, then -48>-64(true)--- x>y

So B is the answer
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info
 Post subject: Re: Inequality Problem
 Post Posted: Tue Oct 18, 2011 6:13 am 
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Forum Guests


Posts: 2
chawla_vinu wrote:
So B is the answer


I could not see the choices...
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geeknick
 Post subject: Re: Inequality Problem
 Post Posted: Thu Nov 17, 2011 4:20 am 
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Posts: 5
A type of cake requires 150g of flour. Another requires 750g of flour. At most, 2.25kg of flour is available, how do you represent this in an inequality?

A dog owner wants to build a rectangular dog run usiing no more than 20m of fencing. She wants the run to have an area of at least 20 square meters. How do you represent this problem as an inequality?
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tim
 Post subject: Re: Inequality Problem
 Post Posted: Wed Nov 23, 2011 2:13 pm 
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ManhattanGMAT Staff


Posts: 2242
Location: Southwest Airlines, seat 21C
Actually, geeknick, we’re not going to answer that question in this thread. You need to start a new thread for a new problem, and be sure to cite the source of the problem, AND make sure there is actually a math problem to solve (neither of the examples you cite are actual math problems, so we won’t know what to do with them unless we know what the question is asking)..

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Tim Sanders
Manhattan GMAT Instructor
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