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

It is currently 22 Oct 2018, 03:02

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

How many newspapers were sold at a certain newsstand today?

  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: 50039
How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 09 Jan 2014, 06:49
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

86% (00:40) correct 14% (00:31) wrong based on 418 sessions

HideShow timer Statistics

The Official Guide For GMAT® Quantitative Review, 2ND Edition

How many newspapers were sold at a certain newsstand today?

(1) A total of 100 newspapers were sold at the newsstand yesterday, 10 fewer than twice the number sold today.
(2) The number of newspapers sold at the newsstand yesterday was 45 more than the number sold today.

Data Sufficiency
Question: 26
Category: Algebra First- and second-degree equations
Page: 155
Difficulty: 600


GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND 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: 50039
Re: How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 09 Jan 2014, 06:49
SOLUTION

How many newspapers were sold at a certain newsstand today?

Say x is the number of newspapers sold today.

(1) A total of 100 newspapers were sold at the newsstand yesterday, 10 fewer than twice the number sold today --> 100 = 2x - 10. We can solve for x. Sufficient.

(2) The number of newspapers sold at the newsstand yesterday was 45 more than the number sold today. Clearly insufficient.

Answer: A.
_________________

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
User avatar
Status: GMATting
Joined: 21 Mar 2011
Posts: 105
Concentration: Strategy, Technology
GMAT 1: 590 Q45 V27
GMAT ToolKit User
Re: How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 09 Jan 2014, 23:02
Let the no. of newspapers sold today be t and yesterday be y.
Question: t=?

(1). y = 100;
Also, y = 2t-10;
=> 100 = 2t-10;
2t = 110; t = 55;

Sufficient.

(2). y = t + 45; Insufficient because of 2 variables in the statement.

Therefore, (A) is the answer.
Director
Director
User avatar
B
Joined: 03 Feb 2013
Posts: 862
Location: India
Concentration: Operations, Strategy
GMAT 1: 760 Q49 V44
GPA: 3.88
WE: Engineering (Computer Software)
Reviews Badge
Re: How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 10 Jan 2014, 11:27
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

How many newspapers were sold at a certain newsstand today?

(1) A total of 100 newspapers were sold at the newsstand yesterday, 10 fewer than twice the number sold today.
(2) The number of newspapers sold at the newsstand yesterday was 45 more than the number sold today.



Statement 1) 100 = 2todays -10 => Todays we can determine. Sufficient.
Statement 2) We need to have the value of newspaper sold yesterday to determine today's. Not Sufficient.

Hence Option A)
_________________

Thanks,
Kinjal
My Debrief : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267.html#p1449379
My Application Experience : http://gmatclub.com/forum/hardwork-never-gets-unrewarded-for-ever-189267-40.html#p1516961
Linkedin : https://www.linkedin.com/in/kinjal-das/

Please click on Kudos, if you think the post is helpful

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50039
Re: How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 11 Jan 2014, 07:31
SOLUTION

How many newspapers were sold at a certain newsstand today?

Say x is the number of newspapers sold today.

(1) A total of 100 newspapers were sold at the newsstand yesterday, 10 fewer than twice the number sold today --> 100 = 2x - 10. We can solve for x. Sufficient.

(2) The number of newspapers sold at the newsstand yesterday was 45 more than the number sold today. Clearly insufficient.

Answer: A.
_________________

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

Ryerson (Ted Rogers) Thread Master
User avatar
Joined: 27 Sep 2015
Posts: 57
Location: Canada
GMAT 1: 410 Q33 V13
WE: Management Consulting (Computer Software)
GMAT ToolKit User
Re: How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 20 Dec 2015, 15:39
t = ?

AD/BCE
Statement I:

y =100
2t-10 = 100
2t = 100-10
t=90/2 = 45

AD/BCE

Statement II:

y = 45 + t
t = ? unknown.
Cannot resolve two variable in one equation.
Not Sufficient

AD/BDE

Hence A is correct answer.
_________________

Discipline does not mean control. Discipline means having the sense to do exactly what is needed.

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 8515
Premium Member
Re: How many newspapers were sold at a certain newsstand today?  [#permalink]

Show Tags

New post 03 Oct 2018, 00:52
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

GMAT Club Bot
Re: How many newspapers were sold at a certain newsstand today? &nbs [#permalink] 03 Oct 2018, 00:52
Display posts from previous: Sort by

How many newspapers were sold at a certain newsstand today?

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


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®.