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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## x(y^2)(z^3)<0? ##### This topic has 1 member reply ## x(y^2)(z^3)<0? if xyz>0. is x(y^2)(z^3)<0? 1.y<0 2.x>0 oa a _________________ let's beat GMAT. Senior | Next Rank: 100 Posts Joined 23 Jun 2008 Posted: 35 messages Upvotes: 2 Given xyz>0, possible signs for x, y, z will be as follows: x y z + + + + - - - + - - - + 1. y<0 Looking at the above list if y<0 then either x is positive and z is negative or x is negative and z is positive. In either case x * (y^2) * (z^3) <0 So. 1 is sufficient. 2. x>0 Again from the table above is x>0, then either both y and z are positive or negative. When both y and z are positive x * (y^2) * (z^3)>0 When both y and z are negative x * (y^2) * (z^3)<0 Therefore insufficient. Hence answer is A • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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