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

It is currently 18 Sep 2018, 20:46

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

A certain expressway has Exits J, K, L, and M, in that order

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49208
A certain expressway has Exits J, K, L, and M, in that order  [#permalink]

Show Tags

New post 30 Jul 2012, 02:12
2
5
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

76% (01:02) correct 24% (00:50) wrong based on 883 sessions

HideShow timer Statistics

The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

A certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ?

(1) The road distance from Exit J to Exit L is 21 kilometers.
(2) The road distance from Exit K to Exit M is 26 kilometers.

Practice Questions
Question: 6
Page: 275
Difficulty: 600


GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:
1. Please provide your solutions to the questions;
2. Please vote for the best solutions by pressing Kudos button;
3. Please vote for the questions themselves by pressing Kudos button;
4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

Thank you!

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49208
Re: A certain expressway has Exits J, K, L, and M, in that order  [#permalink]

Show Tags

New post 03 Aug 2012, 05:36
2
SOLUTION

A certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ?
Attachment:
JKLM.png
JKLM.png [ 1.32 KiB | Viewed 10719 times ]

(1) The road distance from Exit J to Exit L is 21 kilometers. JL=21, so JK+KL=21. Not sufficient.
(2) The road distance from Exit K to Exit M is 26 kilometers. KM=26, so KL+LM=26. Not sufficient.

(1)+(2) We have two distinct linear equations with three unknowns, hence we cannot solve for any of them. Not sufficient.

Answer: E.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Manager
Manager
avatar
Joined: 17 Jul 2010
Posts: 117
Geometry Lines  [#permalink]

Show Tags

New post 25 Nov 2012, 14:27
A certain espressway has exits J,K,L, and M, in that order. What is the road distance from exit K to Exit L?

1. The road distance from exit J to Exit L is 21 KM

2. The road distance from exit K to exit M is 26 KM

Please give a brief shortcut/or thoughts as to how to eliminate possible answers.

Thanks!
Intern
Intern
User avatar
Status: Edge of Extinction
Joined: 09 Sep 2012
Posts: 38
Re: Geometry Lines  [#permalink]

Show Tags

New post 25 Nov 2012, 16:20
J-K-L-M

We know the distance between J and L
We know the distance between K and M

Neither of these tells us anything about the distance between K and L -> A, B, D incorrect
The two statements put together allso tell us nothing about the distance between K and L -> C incorrect

E is correct

Look at this another way, taking a dash for 5 units, and approximating, you can diagram (I) and (II) together as:
J---K-L----M
OR
J--K--L---M
OR
J-K---L--M

Hence E

I don't have a simpler explanation, I'm afraid. :)
_________________

The only ability the GMAT is an indicator of...is the ability to do well on the GMAT.

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49208
Re: Geometry Lines  [#permalink]

Show Tags

New post 26 Nov 2012, 02:42
laythesmack23 wrote:
A certain espressway has exits J,K,L, and M, in that order. What is the road distance from exit K to Exit L?

1. The road distance from exit J to Exit L is 21 KM

2. The road distance from exit K to exit M is 26 KM

Please give a brief shortcut/or thoughts as to how to eliminate possible answers.

Thanks!


Merging similar topics. Please refer to the solutions above.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Intern
Intern
User avatar
Joined: 24 May 2014
Posts: 13
Location: Brazil
Re: A certain expressway has Exits J, K, L, and M, in that order  [#permalink]

Show Tags

New post 02 Jul 2014, 20:41
Bunuel wrote:
SOLUTION

A certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ?
Attachment:
JKLM.png

(1) The road distance from Exit J to Exit L is 21 kilometers. JL=21, so JK+KL=21. Not sufficient.
(2) The road distance from Exit K to Exit M is 26 kilometers. KM=26, so KL+LM=26. Not sufficient.

(1)+(2) We have two distinct linear equations with three unknowns, hence we cannot solve for any of them. Not sufficient.

Answer: E.


Can`t I say (1)+(2):

(1)JL + LM = 21+LM
(2)KM +KJ = 26 + KJ
(1)+(2) = 21+Lm = 26+KJ
LM-KJ = 5
so KL=5 ?
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49208
Re: A certain expressway has Exits J, K, L, and M, in that order  [#permalink]

Show Tags

New post 03 Jul 2014, 05:49
1
Reni wrote:
Bunuel wrote:
SOLUTION

A certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ?
Image
(1) The road distance from Exit J to Exit L is 21 kilometers. JL=21, so JK+KL=21. Not sufficient.
(2) The road distance from Exit K to Exit M is 26 kilometers. KM=26, so KL+LM=26. Not sufficient.

(1)+(2) We have two distinct linear equations with three unknowns, hence we cannot solve for any of them. Not sufficient.

Answer: E.


Can`t I say (1)+(2):

(1)JL + LM = 21+LM
(2)KM +KJ = 26 + KJ
(1)+(2) = 21+Lm = 26+KJ
LM-KJ = 5
so KL=5 ?


The point is that LM - KJ does NOT equal to KL.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Target Test Prep Representative
User avatar
G
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2835
Re: A certain expressway has Exits J, K, L, and M, in that order  [#permalink]

Show Tags

New post 22 Jul 2016, 11:57
Bunuel wrote:
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

A certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ?

(1) The road distance from Exit J to Exit L is 21 kilometers.
(2) The road distance from Exit K to Exit M is 26 kilometers.


Solution:

Let's first put the given information into a diagram. We can also define variables for the distances between J and K, K and L, and L and M.

Distance from J to K = x

Distance from K to L = y

Distance from L to M = z

Image

We are asked to determine the road distance from Exit K to Exit L. Thus, we need to determine the value of y.

Statement One Alone:

The road distance from Exit J to Exit L is 21 kilometers.

Statement one tells us that x + y = 21.

This is not enough information to answer the question. Statement one alone is not sufficient. Eliminate answer choices A and D.

Statement Two Alone:

The road distance from Exit K to Exit M is 26 kilometers.

Statement two tells us that y + z = 26.

This is not enough information to answer the question. Statement two alone is not sufficient. Eliminate answer choice B.

Statements One and Two Together:

From statements one and two we know the following:

x + y = 21 and y + z = 26

Since this is not enough to determine the value of y, we cannot answer the question.

Answer: E
_________________

Jeffery Miller
Head of GMAT Instruction

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 8069
Premium Member
Re: A certain expressway has Exits J, K, L, and M, in that order  [#permalink]

Show Tags

New post 20 Jul 2018, 00:21
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: A certain expressway has Exits J, K, L, and M, in that order &nbs [#permalink] 20 Jul 2018, 00:21
Display posts from previous: Sort by

A certain expressway has Exits J, K, L, and M, in that order

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

Events & Promotions

PREV
NEXT


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®.