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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 ## Value problem ##### This topic has 2 member replies ## Value problem If (y+3)(y-1) - (y-2)(y-1) = r(y-1), what is the value of y? (1) r^2 = 25 (2) r = 5 IMO A Legendary Member Joined 20 Jun 2007 Posted: 1153 messages Followed by: 2 members Upvotes: 146 Target GMAT Score: V50 arorag wrote: If (y+3)(y-1) - (y-2)(y-1) = r(y-1), what is the value of y? (1) r^2 = 25 (2) r = 5 IMO A y^2-y+3y-3 - [ y^2 - y -2y +2 ] = r(y-1) y^2 +2y -3 - y^2 + 3y -2 =r(y-1) 5y - 5 = r(y-1) 5(y-1) = r(y-1) r=5 Statement I r^2 = + or -5 if r=-5 5(y-1) = -5(y-1) 5y-5 = -5y +5 y=1 or if r=5 5(y-1) = 5y-5 y could be anything 1,2,3, anything Insufficient. Statement II r=5 y could be anything 1,2,3 anything Insufficient. Combining I & II r=5 y could be anything, 1 ,2,3,4, 0.5 Insufficient. Hence the answer should be E. Whats the OA? Legendary Member Joined 16 Aug 2008 Posted: 891 messages Followed by: 1 members Upvotes: 27 Target GMAT Score: 750) GMAT Score: 660( What is the source of this Q? I think it is little bit crooked From the main statement we have r=5 - and this should be not changable (1) gives us r = +/- 5 but we have r = 5 5(y-1) = 5y-5 - nothing definite Thus, INSUFF (2) r=5 Yeh, good news! We knew it!!! So what? 5(y-1) = 5y-5 - nothing definite once again! INSUFF Answer E By the way, I think that should be read in such way: If (y+3)(y-1) + (y-2)(y-1) = r(y-1), what is the value of y? (1) r^2 = 25 (2) r = 5 with answer B arorag, could you please check? • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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