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

It is currently 25 Sep 2018, 21:56

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

The point A, B, C, and D are on the number line, not necessa

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
avatar
Joined: 22 Apr 2004
Posts: 151
The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post Updated on: 27 May 2014, 07:40
10
58
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

65% (01:55) correct 35% (02:02) wrong based on 1930 sessions

HideShow timer Statistics

The point A, B, C, and D are on the number line, not necessarily in that order. If the distance between 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.

Originally posted by ronybtl on 17 Nov 2005, 07:25.
Last edited by Bunuel on 27 May 2014, 07:40, edited 2 times in total.
Renamed the topic, edited the question and added the OA.
Most Helpful Expert Reply
Veritas Prep GMAT Instructor
User avatar
P
Joined: 16 Oct 2010
Posts: 8298
Location: Pune, India
Re: The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 06 Jan 2017, 06:10
6
8
ronybtl wrote:
The point A, B, C, and D are on the number line, not necessarily in that order. If the distance between 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.



"If the distance between A and B is 18"
makes me think
A-----------------------------------B
B-----------------------------------A

"the distance between C and D is 8"
C--------------D
D--------------C

Question: Distance between B and D?

(1) The distance between C and A is the same as the distance between C and B.
So C is in the middle of A and B.

A-----------------C-----------------D-B
or
B-----------------C-----------------D-A
or
A-D----------------C------------------B
or
B-D----------------C------------------A

Not sufficient

(2) A is to the left of D on the number line.
No defined relation between B and D. Not sufficient.

Using both statements together, there are two possibilities:
A-----------------C-----------------D-B
or
A-D----------------C------------------B

Still not sufficient.

Answer (E)
_________________

Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >

GMAT self-study has never been more personalized or more fun. Try ORION Free!

Most Helpful Community Reply
Manager
Manager
avatar
Joined: 07 May 2013
Posts: 98
Re: Point A,B,C and D are on a number line but not in that  [#permalink]

Show Tags

New post 10 Oct 2013, 23:26
6
Point A,B,C and D are on a number line but not in that order. If distance between A and B is 18 and distance between C and D is 8, what is the distance between B and D?

(a) Distance between C and A is equal to distance between C and B
(b) A is left of D on the number line.

CHECK attached file.
Attachments

solution101.docx [22.32 KiB]
Downloaded 515 times

To download please login or register as a user

General Discussion
SVP
SVP
User avatar
Joined: 28 May 2005
Posts: 1618
Location: Dhaka
Re: DS: number line  [#permalink]

Show Tags

New post 17 Nov 2005, 14:43
HIMALAYA wrote:
C. 9


I got C as well but bd = 17

from statement 1) CA = CB = 9 but we have no idea where D is located

from statmetn 2 we know that A is left of D. again this is not sufficient.

if we put them together, we get BD = BC + CD = 9 + 8 = 17.

so answer is C.
_________________

hey ya......

Intern
Intern
avatar
Joined: 22 Sep 2005
Posts: 14
Location: NYC, NY
[#permalink]

Show Tags

New post 17 Nov 2005, 19:02
4
Why couldn't it be E?

Since the points are not in any order...

A and B are 18 apart. C is smack in the middle, and D is 8 from the middle, but couldn't it be on either side? so it could be 1 away from D and also 17 away from D, depending on whether C or D is larger, which I don't think it indicates.

Let me know if I'm overlooking something here. I've been on a roll of careless errors, so I could be wrong big time. :(
SVP
SVP
User avatar
Joined: 05 Apr 2005
Posts: 1644
Re: DS: number line  [#permalink]

Show Tags

New post 17 Nov 2005, 19:08
1
nakib77 wrote:
HIMALAYA wrote:
C. 9

I got C as well but bd = 17
from statement 1) CA = CB = 9 but we have no idea where D is located
from statmetn 2 we know that A is left of D. again this is not sufficient.
if we put them together, we get BD = BC + CD = 9 + 8 = 17.
so answer is C.

hey ram.... ......
let me change the OA because i assumed CD= 18. it should be E. because D can in between A and C and C and B.
if it is between A and C, BD=17
if it is between B and C, BD=1

so we donot know....E
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 4906
Location: Singapore
  [#permalink]

Show Tags

New post 17 Nov 2005, 19:29
(a) is not sufficient. B and D could be 1, or could be 17.
(b) is not sufficient as you can't tell where B is positioned.

Using both, we have a,b,c,d in the following order: b,c,d,a and the distance between b and d would be 9+8 = 17
Senior Manager
Senior Manager
avatar
Joined: 27 Jun 2005
Posts: 489
Location: MS
  [#permalink]

Show Tags

New post 17 Nov 2005, 22:07
1
1
one more E

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

(a) Distance between C and A is equal to distance between C and B
as this tell us C is in the center of A and B its equidistant from both

but no information about D

if we assume that A is at 0
B at 18
C at 9
then D can be at 17 or at 1 so Insuff

(b) A is left of D on the number line.

does not provide any information about the location of B and D

In suff

taking together

sill the these assumption satisfy both the condition
if we assume that A is at 0
B at 18
C at 9
then D can be at 17 or at 1 so Insuff

but gives different value of distance between B and D

hence E
Manager
Manager
avatar
Joined: 13 Jan 2009
Posts: 162
Schools: Harvard Business School, Stanford
The points A, B, C and D are on a number line, not  [#permalink]

Show Tags

New post 02 Sep 2009, 02:55
1
The points A, B, C and D are on a number line, not necessarily in this order. If the distance between A and B is 18 and the distance betwen 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.
Senior Manager
Senior Manager
avatar
Joined: 23 Jun 2009
Posts: 353
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Re: points A,B,C,D on a number line  [#permalink]

Show Tags

New post 02 Sep 2009, 03:03
1)insuff,
this says AC=BC=9
nothing about BD
2)insuff,
we do not know whether B is left to A or right to A.
Together
insuff. We know BA, BC, AC, CD or do not know BD.
Manager
Manager
avatar
Joined: 25 Aug 2009
Posts: 162
Re: points A,B,C,D on a number line  [#permalink]

Show Tags

New post 02 Sep 2009, 17:10
14
6
see figure..
Attachments

numberline.gif
numberline.gif [ 8.67 KiB | Viewed 77962 times ]

Manager
Manager
User avatar
Joined: 29 Jul 2011
Posts: 94
Location: United States
Re: Points on a line  [#permalink]

Show Tags

New post 12 Dec 2011, 18:57
4
1
ABCD can be arranged in any order on the number line, the question stem does not has enough information to rephrase. So, lets move to statements.

1. C is between A and B. There are four sequences possible here: ACDB, ADCB, BCDA, and BDCA. All cases has different distances (2 pairs) between B and D. INSUFFICIENT
2. A is to the left of D. Where is D w.r.t B? INSUFFICIENT

Together, we have ACDB or ADCB as the sequence, both with different distances between B and D. INSUFFICIENT.

E.
_________________

I am the master of my fate. I am the captain of my soul.
Please consider giving +1 Kudos if deserved!

DS - If negative answer only, still sufficient. No need to find exact solution.
PS - Always look at the answers first
CR - Read the question stem first, hunt for conclusion
SC - Meaning first, Grammar second
RC - Mentally connect paragraphs as you proceed. Short = 2min, Long = 3-4 min

Intern
Intern
avatar
Joined: 25 Oct 2011
Posts: 3
Re: Points on a line  [#permalink]

Show Tags

New post 14 Dec 2011, 06:43
If you draw a number line and plot points ABCD on it, then you will realise that -

1) B can be between A and C
2) C can be between A and B

The above 2 variations is sufficient to prove that the answer is E.
Senior Manager
Senior Manager
User avatar
Joined: 13 May 2013
Posts: 430
Re: The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 06 Dec 2013, 12:16
1
3
The point A, B, C, and D are on the number line, not necessarily in the order. If the distance between 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.

Here is my take.

(1) we know that CA=CB and that the distance between A and B = 18 so A is at 0, C is at 9 and B is at 18 with CA=CB=9. Because C is in the middle, D has to lie somewhere between A and B, 8 units away, specifically at 1 or 17 (9-8 or 9+8) The difference between B and D, therefore, could be 18-17 or 18-1. Insufficient.

(2) This tells us very little, especially considering that the stem gives us no order in which A,B,C,D can be placed. A could be at 1 and D at 2 or D at 1000. Insufficient.

(1+2) (2), when taken into consideration with (1) provides us no new information. From (1) we already know that D lies to the right of A. All we know is that it could be 1 away from A or 17 away from A.

Insufficient, E
Intern
Intern
avatar
B
Joined: 19 Sep 2011
Posts: 30
GMAT ToolKit User Premium Member
Re: The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 03 Sep 2014, 20:20
Answer E

Statement 1: - Tells me that C is in middle of A and B but no idea where D is located so Insufficient

Statement 2: - no idea where ion number line do A and D lie , only their relative position to each other is known. again Insufficient

Together S1 and S2: - Insuficient because D can still lie between point C and B or after B so two different values can be found.
Intern
Intern
avatar
Joined: 10 Jun 2016
Posts: 1
The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 14 Jun 2016, 10:04
The point A, B, C, and D are on the number line, not necessarily in the order. If the distance between 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.


The GMAT answer to this question is letter E:

1) A_D_______C_________B
2) A_________C_______D_B
3) B_D_______C_________A
4) B_________C_______D_A

It can be seen that the distance between A and B remains 18 in all cases. The distance between C and D remains 8 in all cases. Furthermore as mentioned in the statement one C is in the middle between A and B and therefore the distance from C to A and B is 9 each respectively.
In the cases 2) & 3) the distance between B and D is one and in the cases 1) and 4) the distance between B and D is 17. There the answer choice A is incorrect.
The second statement eliminates the cases 1) and 2). Nethertheless the distance between B and D remains at 1 or 17 in case 3) and 4) respectively.
Therefore both statements together are not suffient and the right answere choice should be E.
Director
Director
User avatar
B
Status: I don't stop when I'm Tired,I stop when I'm done
Joined: 11 May 2014
Posts: 542
Location: Bangladesh
Concentration: Finance, Leadership
GPA: 2.81
WE: Business Development (Real Estate)
The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 14 Jun 2016, 11:19
3
ronybtl wrote:
The point A, B, C, and D are on the number line, not necessarily in that order. If the distance between 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.


Given ,AB=18 and CD=8 ,
(1)No information of the specifice placement of D,Insufficient

(2) No information of te distance ,Insufficient

(1)+(2) CD<9,So both of C and D points are left of A and their placement and are interchangeable or not specific ,

So the distance between B and D is not specific .Insufficient

Correct Answer E
_________________

Md. Abdur Rakib

Please Press +1 Kudos,If it helps
Sentence Correction-Collection of Ron Purewal's "elliptical construction/analogies" for SC Challenges

Director
Director
User avatar
G
Joined: 26 Oct 2016
Posts: 648
Location: United States
Concentration: Marketing, International Business
Schools: HBS '19
GMAT 1: 770 Q51 V44
GPA: 4
WE: Education (Education)
Re: The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 29 Jan 2017, 05:11
AD = 18
BC = 8

What is BD?

Statement 1: AC = BC, we can have two possibilities:

-------------A-----------------C----------------B---D------ so BD = 1


-------------A,B---------------C--------------------D------ A and B are on the same point, so BD = 18

Insufficient


Statement 2: A is to the left of D.

There is no info on the position of B relative to A or D. Insufficient.

Both statements together:
Both possibilities shown in statement 1 also satisfies statement 2. So insufficient.

Choose E.
_________________

Thanks & Regards,
Anaira Mitch

Manager
Manager
avatar
B
Joined: 31 Dec 2016
Posts: 81
Re: The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 18 Jun 2017, 15:10
1
Here is just an example of how the number line could look.
Attachments

answer 2.png
answer 2.png [ 318.87 KiB | Viewed 19049 times ]

Manager
Manager
User avatar
S
Joined: 11 Sep 2013
Posts: 162
Concentration: Finance, Finance
CAT Tests
The point A, B, C, and D are on the number line, not necessa  [#permalink]

Show Tags

New post 25 Dec 2017, 11:36
A---------------B(9) -------------C(18)-----D(26) or
A---------------B(9)---D(10)-------C(18)
After even combining these two we are not getting any concrete answer.
GMAT Club Bot
The point A, B, C, and D are on the number line, not necessa &nbs [#permalink] 25 Dec 2017, 11:36

Go to page    1   2    Next  [ 23 posts ] 

Display posts from previous: Sort by

The point A, B, C, and D are on the number line, not necessa

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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®.