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if a, b, and c are three numbers on the number line shown

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dw6586
 Post subject: if a, b, and c are three numbers on the number line shown
 Post Posted: Tue Sep 25, 2012 2:21 pm 
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Students


Posts: 12
<-----a------b----->

if a, b, and c are three numbers on the number line shown above, is c between a and b?

(1) b < 0
(2) a - b > c


Ans e

i don't understand why (2) is not sufficient, given the number line shown. it looks from the number line that a < b.

but in the explanation, they give examples such that a = 0 and b = -2. i'm baffled ... am i supposed to assume that even when they list something out on a number line, the order may not actually be shown correctly? (i understand some figures may not be drawn accurately, but i assumed the order of numbers on a number line wouldn't fall in this case??)
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tim
 Post subject: Re: if a, b, and c are three numbers on the number line shown
 Post Posted: Wed Sep 26, 2012 11:28 am 
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ManhattanGMAT Staff


Posts: 4410
Location: Southwest Airlines, seat 21C
if this is a gmat prep question, there shouldn't be an "explanation". can you post a screen shot of the question and solution?

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Tim Sanders
Manhattan GMAT Instructor
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dw6586
 Post subject: Re: if a, b, and c are three numbers on the number line shown
 Post Posted: Wed Sep 26, 2012 1:49 pm 
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Students


Posts: 12
here is a screenshot of the problem.

http://s10.postimage.org/53yzizu0p/Scre ... _54_PM.png
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tim
 Post subject: Re: if a, b, and c are three numbers on the number line shown
 Post Posted: Thu Sep 27, 2012 1:06 am 
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ManhattanGMAT Staff


Posts: 4410
Location: Southwest Airlines, seat 21C
i stand corrected. glad to see they include explanations now. looks like a typo here, and i'm not really sure what they meant to do so i can't "fix" their problem..

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Tim Sanders
Manhattan GMAT Instructor
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