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How far is A from C?

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How far is A from C? [#permalink] New post 20 Jun 2012, 11:14
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

80% (01:15) correct 20% (00:09) wrong based on 80 sessions
How far is A from C?

(1) A is 10 miles from D
(2) C is 3 miles from D
[Reveal] Spoiler: OA
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Re: How far is A from C? [#permalink] New post 20 Jun 2012, 11:22
Hi,

From (1)
A is 10 miles from D,
No info about C. Insufficient.

From (2)
C is 3 miles from D.
No info about A. Insufficient.

Using both,
A, C & D can be positioned in any direction. Thus, Insufficient.

Answer (E).

This doesn't appear to be a GMAT question.
I believe you are looking for following type of question:
http://gmatclub.com/forum/the-points-a-b-c-and-d-are-on-a-number-line-not-83389.html

Regards,
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Re: How far is A from C? [#permalink] New post 20 Jun 2012, 11:47
cyberjadugar wrote:
Hi,

From (1)
A is 10 miles from D,
No info about C. Insufficient.

From (2)
C is 3 miles from D.
No info about A. Insufficient.

Using both,
A, C & D can be positioned in any direction. Thus, Insufficient.

Answer (E).

This doesn't appear to be a GMAT question.

I believe you are looking for following type of question:
http://gmatclub.com/forum/the-points-a-b-c-and-d-are-on-a-number-line-not-83389.html

Regards,



a kaplan practice question.
i truly don,t have an idea whats actual GMAT type question. may be not.
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Re: How far is A from C? [#permalink] New post 20 Jun 2012, 23:42
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Expert's post
kashishh wrote:
How far is A from C?

(1) A is 10 miles from D
(2) C is 3 miles from D


Each statement alone is clearly insufficient. When we consider them together, even if we say that A, D, and C are collinear, we can still have different answers. Look at the diagram below:
Attachment:
ADC.png
ADC.png [ 2.58 KiB | Viewed 1546 times ]
For the first case the answer is 13 miles and for the second case the answer is 7 miles.

Answer: E.
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Re: How far is A from C? [#permalink] New post 21 Jun 2012, 11:19
Expert's post
cyberjadugar wrote:

This doesn't appear to be a GMAT question.
I believe you are looking for following type of question:
http://gmatclub.com/forum/the-points-a-b-c-and-d-are-on-a-number-line-not-83389.html

Regards,

Hi cyberjagudar!

Thanks for the explantion--you covered it well! You seem to be strong at math, which is probably why our practice questions doesn't look test like to you--you haven't seen ones of that low difficulty. But remember, the test is adaptive! Folks who are still early in their prep and struggling with their math scores will likely see easier problems than the ones you're used to until they refresh their math skills from high-school and start getting early questions consistently correct.

Hope this helps!
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Joined: 28 Mar 2012
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Concentration: Entrepreneurship
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Re: How far is A from C? [#permalink] New post 22 Jun 2012, 00:16
KapTeacherEli wrote:
cyberjadugar wrote:

This doesn't appear to be a GMAT question.
I believe you are looking for following type of question:
http://gmatclub.com/forum/the-points-a-b-c-and-d-are-on-a-number-line-not-83389.html

Regards,

Hi cyberjagudar!

Thanks for the explantion--you covered it well! You seem to be strong at math, which is probably why our practice questions doesn't look test like to you--you haven't seen ones of that low difficulty. But remember, the test is adaptive! Folks who are still early in their prep and struggling with their math scores will likely see easier problems than the ones you're used to until they refresh their math skills from high-school and start getting early questions consistently correct.

Hope this helps!

Hi,

Well, I would say that the mentioned question is not an easy one, only due to the fact that there are many possibilities for position of A, B & C. If they were collinear there would be some restriction on the total number of cases.

Regards,
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Re: How far is A from C? [#permalink] New post 24 Jun 2012, 13:24
Dear cyberjadugar and Mr. Eli,

i did this particular quest. and in 5 sec. chose 'c' - obviously wrong!
i think more than i didn't understand the question, i hurried and on my part a silly mistake.
i posted it more for the tricky part of it (atleast i felt so)!

thanx cyberjadugar for putting it right and for the link. it is always good to get direction and guidance. truly thanx,
i learnt.

Thnx Mr. Eli n Thanx to Kaplan to give such brush ups for people like me.
I mentioned Kaplan just and just to cite the importance of the question.


regards,
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Re: How far is A from C? [#permalink] New post 01 Aug 2013, 13:45
How far is A from C?

The first thing we should note is that the GMAT is tricky. It's natural to assume that A,B,C and D appear in the linear order they do in the alphabet. However, this isn't specified in the stem thus it cannot be assumed.

(1) A is 10 miles from D
This tells us nothing about B.
INSUFFICIENT

(2) C is 3 miles from D
This tells us nothing about A.
INSUFFICIENT

1+2)

There are two cases here:

(0mi) A=======C===D (10mi)
In this case, C would be located 7mi away from A.
OR
A==========D===C
In this case, C would be located 13mi away from A.
INSUFFICIENT.

(E)
Re: How far is A from C?   [#permalink] 01 Aug 2013, 13:45
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