GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 13 Aug 2018, 23:38

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# The points A, B, C, and D are on the number line, not

Author Message
Intern
Joined: 08 Oct 2007
Posts: 33
The points A, B, C, and D are on the number line, not  [#permalink]

### Show Tags

03 Dec 2008, 07:34
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

The points A, B, C, and D are on the number line, not necessarily in that order. If the distance A and B is 18 and the distance between C and D is 8, what is the distance between B and D?

1) the distance between C and A is the same as the distance between C and B

2) A is to the left of D on the number line

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
SVP
Joined: 30 Apr 2008
Posts: 1841
Location: Oklahoma City
Schools: Hard Knocks
Re: DS A, B, C, D  [#permalink]

### Show Tags

03 Dec 2008, 07:52
1
E

Statement 1
This tells us that C must be exactly in the middle of A and B, so AC = 9 and CB = 9. At first glance, this seems like sufficient, but it still doesn't tell us exactly where D is. We know that CD is 8. But D could be to the left of C making BD=17 or it could be to the right, making BD=1.

Statement 2
The key here is to NOT bring in the information from Statement 1. If all we know is the directionaly location of D compared to A, this doesn't give us enough concrete information to know the distance of BD. A could be any distance to the left of A, AND we are n't certain of the order of AB. it could still be BA =18...we just don't know.

Together
If we have A..................B (notice 18 dots) or even B..................A
From #1 we know that C must be equal distance between A & B

So, A.........C.........B
and from #2 we know that A is to the left of D, and CD = 8. Well, what about D's relation to C? D could be on the left of C or right of C and still be to the right of A (provided A is actually left of B).

If D is to the left of C and right of A, what length does that make BD? it sould make it DC +CB or 8 + 9 = 17.

What if D is to the right of C (which will still be right of A), then that makes BD = CB - CD or BD = 9 - 8 = 1

Together both statements are insufficient.

Rice wrote:
The points A, B, C, and D are on the number line, not necessarily in that order. If the distance A and B is 18 and the distance between C and D is 8, what is the distance between B and D?

1) the distance between C and A is the same as the distance between C and B

2) A is to the left of D on the number line

_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a\$\$.

GMAT Club Premium Membership - big benefits and savings

Current Student
Joined: 28 Dec 2004
Posts: 3281
Location: New York City
Schools: Wharton'11 HBS'12
Re: DS A, B, C, D  [#permalink]

### Show Tags

03 Dec 2008, 07:54
A----B----C----D

1) says C is in btwn A----C----B ----D <-- but we dont know where D is ? Insuff

2) says A---D----B----C or we could have B----D----A Insuff

together we know that A--D--C----B or A----C---D-B

E it is
SVP
Joined: 30 Apr 2008
Posts: 1841
Location: Oklahoma City
Schools: Hard Knocks
Re: DS A, B, C, D  [#permalink]

### Show Tags

03 Dec 2008, 07:56
I almost always Google questions after I answer them. Check this out for more discussion:

WARNING: This is a link to outside GMATClub. I believe the smartest people discuss questions here so leave GMATClub at your own risk!!! (just kidding)

http://www.beatthegmat.com/number-line-t5852.html
_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a\$\$.

GMAT Club Premium Membership - big benefits and savings

Intern
Joined: 08 Oct 2007
Posts: 33
Re: DS A, B, C, D  [#permalink]

### Show Tags

03 Dec 2008, 07:56
It's a really great EXPLANATION. Thanks

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: DS A, B, C, D &nbs [#permalink] 03 Dec 2008, 07:56
Display posts from previous: Sort by

# Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.