BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

GMATPrep,pls,help

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 1404
Joined: Tue May 20, 2008 6:55 pm
Thanked: 18 times
Followed by:2 members

GMATPrep,pls,help

by tanviet » Wed Dec 23, 2009 7:21 pm
This is from GMATPrep, pls help

<-----------r------------s---------t-------->

on the number line shown, is zero haft way between r and s

a, s is to the right fo zero

b, the distance between t and r is the same as distance between t and -s

OA is C,(both statement is needed)

why so, B is ok.pls, help
Top
Source: — Data Sufficiency |
User avatar
Community Manager
Posts: 1537
Joined: Mon Aug 10, 2009 6:10 pm
Thanked: 653 times
Followed by:252 members

by papgust » Thu Dec 24, 2009 3:00 am
Check this solution from Ron,
https://www.manhattangmat.com/forums/is- ... t4202.html
Top
Junior | Next Rank: 30 Posts
Posts: 13
Joined: Sun Dec 20, 2009 11:43 am

by yserious » Thu Dec 24, 2009 6:08 am
papgust wrote:Check this solution from Ron,
https://www.manhattangmat.com/forums/is- ... t4202.html
Jus saw the solution there..

====
the particular trap you've fallen into in your interpretation of (2) is that of assuming "-s" is to the LEFT of "t". there is no good reason whatsoever to make this assumption, and, what's more, at least one good reason (viz., "the gmat loves to test exactly these sorts of assumptions) not to make it.
of course, you don't need reasons to be very careful about your assumptions; that should be your default state.

if "-s" is to the right of "t", then you have
<--r-------s---t-----------(-s)-->
in which case 0 is in no-man's-land between "t" and "-s".
in this case, note that "s" is negative. also note that (-s) is positive in this case, a situation that is difficult to digest for most students

===
i wanna know, how can the distance between t and -s be equal to the distance between t and r when -s is to the LEFT of "t"
my assumption is that -s could not be on the right of t for the distance between t and r to be same as distance between t and -s
Top
Junior | Next Rank: 30 Posts
Posts: 13
Joined: Sun Dec 20, 2009 11:43 am

by yserious » Sat Dec 26, 2009 12:26 am
Can somebody pls help here?

how can the distance between t and -s be equal to the distance between t and r when -s is to the LEFT of "t"
my assumption is that -s could not be on the right of t for the distance between t and r to be same as distance between t and -s
Top
Post new topic Post Reply
• Page 1 of 1