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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 DS OG 12 # 152 This topic has 1 expert reply and 3 member replies DS OG 12 # 152 If Carmen had 12 more tapes she would have twice as many tapes as Rafael. Does Carmen have fewer tapes then Rafael? S1. Rafael has more then 5 tapes S2. Carmen has fewer than 12 tapes I got this right however i think it was by accident. Any one care to share their approach with me and so we can compare? GMAT/MBA Expert GMAT Instructor Joined 21 Jan 2009 Posted: 3650 messages Followed by: 82 members Upvotes: 267 GMAT Score: 760 HPengineer wrote: If Carmen had 12 more tapes she would have twice as many tapes as Rafael. Does Carmen have fewer tapes then Rafael? S1. Rafael has more then 5 tapes S2. Carmen has fewer than 12 tapes I got this right however i think it was by accident. Any one care to share their approach with me and so we can compare? Take C + 12 = 2 R from stem. C will always be EVEN as C and R are whole numbers. Then try answering if C < R. S1. If R > 5, then C + 12 is at least 12 as C and R are whole numbers. When R is 6, C is 0, making C < R as true, but when R is 12, C = R. So insufficient S2. If C < 12, then it can at most be 10 to ensure C and R are whole numbers. When C is 10, R is 11, making C < R as true, which remains as true for all smaller possibilities for C. So sufficient B _________________ The mind is everything. What you think you become. â€“Lord Buddha Sanjeev K Saxena Quantitative Instructor The Princeton Review - Manya Abroad Lucknow-226001 www.manyagroup.com Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. Legendary Member Joined 26 Apr 2010 Posted: 759 messages Followed by: 3 members Upvotes: 85 also got B the number of tapes Carmen-c the number of tapes Rafael-r we are given c+12=2r r=c/2+6 and asked if r>c, or (c/2+6)-c>0 c+12-2c>0 is c<12 (1) insuffiicent, here to answer definitely we need to prove that r<12, but given that r>5 (2) c<12 suffiicent Master | Next Rank: 500 Posts Joined 24 Mar 2010 Posted: 165 messages Followed by: 1 members Upvotes: 2 Ok heres how i solved it... Im wondering if its dangerous to solve similar probems with out inequalities... S1. Rafael has more then 5 tapes C + 12 = 2R so plug 6 in for R and solve for C which = 0 so less tapes then Rafael Now try a larger number say 20 for R and you will get C = 38 which is more tapes then Rafaeal therefore S1 is Insuff. S2. Carmen has fewer than 12 tapes Here i simply plugged in 11 for C and solved for R 11+12= 2R or 23/2 = R so R = 11.5 which is greater then C so statement is sufficient. What troubled me here is that i did not get a integer for R... How can you have half a tape? Shouldnt this be a hidden constraint problem since were dealing with items? Senior | Next Rank: 100 Posts Joined 13 Oct 2009 Posted: 55 messages Upvotes: 3 @HPengineer: i solved it in the same way...... • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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