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

Redeem

number line

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 385
Joined: Fri Sep 23, 2011 9:02 pm
Thanked: 62 times
Followed by:6 members

by user123321 » Wed Nov 09, 2011 5:38 am
colakumarfanta wrote:Q. A to B is 9, B to C is 4 . Three points are not on the straight line . What is the value of A to C ? A. 3 B. 5 C. 9 D. 13 E. 15
AB = 9, BC = 4
if three points are not on straight line, then it is possible to form a triangle. So the points will obey the properties of triangle

1) sum of two sides is always greater than third side.
we can eliminate D,E.
2) difference of two sides is always less than third side. so A & B can be eliminated.
hence C

user123321
Just started my preparation :D
Want to do it right the first time.
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Wed Nov 09, 2011 5:44 am
colakumarfanta wrote:Q. A to B is 9, B to C is 4 . Three points are not on the straight line . What is the value of A to C ?
Don't be tricked by the heading of the question. This is not at all a number line problem.

As the three points are not on a straight line, they must form a triangle. Now, in the triangle ABC, sum of the lengths of any two sides must be greater than the length of the third side.
  • A. If AC = 3, then (AC + BC) = (3 + 4) = 7 < 9 = AB --> NO
    B. If AC = 5, then (AC + BC) = (5 + 4) = 9 = AB --> NO
    C. 9, then
    • (AC + BC) = (9 + 4) = 13 > 9 = AB
      (AB + BC) = (9 + 4) = 13 > 9 = AC
      (AC + AB) = (9 + 9) = 18 > 4 = AB ----> YES
    D. If AC = 13, then (AB + BC) = (9 + 4) = 13 = AC --> NO
    E. If AC = 15, , then (AB + BC) = (9 + 4) = 13 < 15 = AC --> NO
The correct answer is C.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/
Top
Master | Next Rank: 500 Posts
Posts: 382
Joined: Thu Mar 31, 2011 5:47 pm
Thanked: 15 times

by ArunangsuSahu » Thu Nov 10, 2011 4:37 pm
Formula for Triangle:

(a+b)>c

Now try by options

(C) is the answer
Top
Post new topic Post Reply
• Page 1 of 1