GMAT Prep 1: Symbol issue

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anantbhatia: Senior | Next Rank: 100 Posts; Posts: 98; Joined: Sat Feb 06, 2010 11:56 pm; Thanked: 5 times

by anantbhatia » Sun Oct 24, 2010 11:48 am

The problem with this question is that we are asked if LHS=RHS.
(1) is definitely sufficient. with either + or *, we get a firm answer YES.

(2) the only possible operation is division.
And with division, we get a firm answer to the question- NO.

aren't both the statements enough to answer the question asked?

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Source: Beat The GMAT — Data Sufficiency | Sun Oct 24, 2010 11:48 am

clock60: Legendary Member; Posts: 759; Joined: Mon Apr 26, 2010 10:15 amFollowed by: 3 members; Thanked: 85 times

by clock60 » Sun Oct 24, 2010 1:04 pm

i hope the the problem asks is @=(+), or (*), @ is a substitute for triangle in original version
(1)3@2>3 possible only for (+) or (*) suff
(2) 3@1=3 also possible for division 3/1=3 and *multiplication
multiplication will give us yes answer (6*2)*4=6*(2*4) but division will not
6/2=3. 3/4
2/4=1/2. 0,5/6=1/12. 3/4 doe not equal 1/12 so 2 st insuff

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anantbhatia: Senior | Next Rank: 100 Posts; Posts: 98; Joined: Sat Feb 06, 2010 11:56 pm; Thanked: 5 times

by anantbhatia » Sun Oct 24, 2010 8:24 pm

Thanks man.. missed out the multiplication part in (2). It is clear now.

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