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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 question This topic has 2 expert replies and 1 member reply ds question □ 2 + 3 ∆ ---- ◙ ◊ In the correct addition shown above, all symbols represent different nonzero digits. What is th number represented by ◙ ◊? 1. □ = 2*∆ 2. 10◙ + ◊ = 95 what is the answer and why? GMAT/MBA Expert GMAT Instructor Joined 02 Jun 2008 Posted: 2475 messages Followed by: 350 members Upvotes: 1090 GMAT Score: 780 If you write a two-digit number x as AB, where A is the tens digit and B is the units digit, that means that x is equal to 10A + B. So 2) above is certainly sufficient; it tells you exactly that the number is equal to 95. The first statement is insufficient only because there are two possible cases- we could have 22+ 31 = 53, or we could have 62 + 33 = 95. In both cases the sum is a two digit number, and each of the symbols represents a different digit. _________________ If you are looking for online GMAT math tutoring, or if you are interested in buying my advanced Quant books and problem sets, please contact me at ianstewartgmat at gmail.com Junior | Next Rank: 30 Posts Joined 20 Jul 2008 Posted: 29 messages Upvotes: 1 but how can that satisfy : □ +3 = □ is there something wrong in the question.... GMAT/MBA Expert GMAT Instructor Joined 02 Jun 2008 Posted: 2475 messages Followed by: 350 members Upvotes: 1090 GMAT Score: 780 gurudev wrote: but how can that satisfy : □ +3 = □ is there something wrong in the question.... Perhaps the symbols aren't displaying properly in your browser? There are two different squares here, one white, one black. It' easier to see the problem with letters anyway; it should read: A2 + 3B = CD where A, B, C and D are distinct nonzero digits. What is CD? 1) A = 2B 2) CD is equal to 10*C + D • FREE GMAT Exam Know how you'd score today for$0

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