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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

please help

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 6
Joined: Tue Jan 22, 2008 10:11 am
by uria » Sun Mar 30, 2008 5:40 pm
DS Question:
On the number line, the distance between point A and point C is 5 and the distance between point B and C is 20. Does point C lie between point A and point B?
1. The distance between point A and point B is 25.
2. Point A lies to the left of B.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 543
Joined: Fri Jan 18, 2008 1:01 am
Thanked: 43 times
GMAT Score:580

by codesnooker » Sun Mar 30, 2008 11:03 pm
Answer: (D). Both the statements are alone sufficient.

Solution:

Check the attached image.


On the number line there are only two conditions where B can lie, marked as B and B'.

As first statement state: distance between A and B is 25 => B' not possible as distance between A and B' is only 15 which contradicts 1st statement. => C lies between A and B.

Statement 2 state, Point A lies left to B => C lies between A and B.

Image is self explanatory, as B' is not possible at all with any one of the mentioned statement
Attachments
numberline.GIF
numberline
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 3225
Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members
Location: Toronto
Thanked: 1710 times
GMAT Score:800

by Stuart@KaplanGMAT » Mon Mar 31, 2008 8:40 am
codesnooker wrote:Answer: (D). Both the statements are alone sufficient.

Solution:

Check the attached image.


On the number line there are only two conditions where B can lie, marked as B and B'.

As first statement state: distance between A and B is 25 => B' not possible as distance between A and B' is only 15 which contradicts 1st statement. => C lies between A and B.

Statement 2 state, Point A lies left to B => C lies between A and B.

Image is self explanatory, as B' is not possible at all with any one of the mentioned statement
I agree that statement (1) is sufficient.

However, for statement (2), why couldn't it go:

C----5------A-------------15--------------B

to get a "no" answer?

In fact, since we don't have any directional info other than statement (2), how can it possibly matter if A is to the left of or to the right of B? Even in your sketch for statement (1) it could have gone:

B----------20------------C----5----A

or

A-----5----C------------20---------B

(1) is sufficient, but (2) isn't: choose (b).
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 6
Joined: Tue Jan 22, 2008 10:11 am

by uria » Mon Mar 31, 2008 11:32 am
thanks a lot guys...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 543
Joined: Fri Jan 18, 2008 1:01 am
Thanked: 43 times
GMAT Score:580

by codesnooker » Mon Mar 31, 2008 11:54 pm
Yeah you are correct Stuart. My bad, I missed that point.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1