Time consuming problem

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sl750: Master | Next Rank: 500 Posts; Posts: 496; Joined: Tue Jun 07, 2011 5:34 amFollowed by: 1 member; Thanked: 38 times

by sl750 » Tue Aug 09, 2011 3:08 am

If x#y=(2x-y)/(2y-x) , where x <> 2y, then is a#b>b#a ?

(1) a<b

(2) 2a<b

How can we solve such problems under 2 minutes. The answer is E

Thanks

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Source: Beat The GMAT — Data Sufficiency | Tue Aug 09, 2011 3:08 am

kmittal82: Master | Next Rank: 500 Posts; Posts: 324; Joined: Mon Jul 05, 2010 6:44 amFollowed by: 3 members; Location: London; Thanked: 70 times

by kmittal82 » Tue Aug 09, 2011 3:11 am

Sorry, not familiar with the notation "x <> 2y". Can you clarify that?

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navami: Legendary Member; Posts: 540; Joined: Sat Dec 20, 2008 7:24 pmFollowed by: 6 members; Thanked: 37 times

by navami » Tue Aug 09, 2011 4:30 am

I guess x <> 2y means NOT EQUAL to

This question is too time consuming for GMAT
as you have to consider the below cases
a b
------
+ -
+ +
- +
- -

and also the other conditions

This time no looking back!!!
Navami

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gmatboost: Master | Next Rank: 500 Posts; Posts: 312; Joined: Tue Aug 02, 2011 3:16 pmFollowed by: 33 members; Location: New York City; Thanked: 130 times; GMAT Score:780

by gmatboost » Tue Aug 09, 2011 10:16 pm

Recent discussion
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sl750: Master | Next Rank: 500 Posts; Posts: 496; Joined: Tue Jun 07, 2011 5:34 amFollowed by: 1 member; Thanked: 38 times

by sl750 » Wed Aug 10, 2011 10:00 am

Thanks Gmatboost !!. I see that in that thread, I did submit a response. Lol.. What is happening to me. I must be studying to hard

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