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

It is currently 21 Nov 2018, 10:08

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
Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
  • All GMAT Club Tests are Free and open on November 22nd in celebration of Thanksgiving Day!

     November 22, 2018

     November 22, 2018

     10:00 PM PST

     11:00 PM PST

    Mark your calendars - All GMAT Club Tests are free and open November 22nd to celebrate Thanksgiving Day! Access will be available from 0:01 AM to 11:59 PM, Pacific Time (USA)
  • Key Strategies to Master GMAT SC

     November 24, 2018

     November 24, 2018

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

At a retail shop, the price of a pencil was $0.20 more than the price

  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: 50730
At a retail shop, the price of a pencil was $0.20 more than the price  [#permalink]

Show Tags

New post 21 Oct 2018, 23:25
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

61% (01:56) correct 39% (01:14) wrong based on 38 sessions

HideShow timer Statistics

At a retail shop, the price of a pencil was $0.20 more than the price of an eraser. What was the revenue from the sale of erasers at the shop yesterday?

(1) The number of erasers sold at the shop yesterday was 10 more than the number of pencils.
(2) The total revenue from the sale of pencils at the shop yesterday was $30.

_________________

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

Director
Director
avatar
G
Joined: 19 Oct 2013
Posts: 503
Location: Kuwait
GPA: 3.2
WE: Engineering (Real Estate)
GMAT ToolKit User CAT Tests
Re: At a retail shop, the price of a pencil was $0.20 more than the price  [#permalink]

Show Tags

New post 22 Oct 2018, 14:22
Bunuel wrote:
At a retail shop, the price of a pencil was $0.20 more than the price of an eraser. What was the revenue from the sale of erasers at the shop yesterday?

(1) The number of erasers sold at the shop yesterday was 10 more than the number of pencils.
(2) The total revenue from the sale of pencils at the shop yesterday was $30.


Let price of pencil be p
Price of eraser be e

p = 0.20 + e

Let the number of erasers be x
Number of pencil be y

Revenue from erasers = price of erasers * number of erasers

Revenue = e * x

To find the revenue we must know these two variables.

Statement 1)

Tells us x = y + 10

Insufficient.

Statement 2)

Tells us revenue of pencil = 30

So 30 = p * y

We have two variables insufficient.

Combined still insufficient as we don’t have enough information.

Answer choice E

Posted from my mobile device
Manager
Manager
avatar
S
Joined: 15 Feb 2018
Posts: 84
Re: At a retail shop, the price of a pencil was $0.20 more than the price  [#permalink]

Show Tags

New post 22 Oct 2018, 17:20
I got to the point where a quadratic equation could be set up using both statement 1 and 2, but I couldn't progress further. I don't know how to prove that it's insufficient. Please prove.
Director
Director
avatar
G
Joined: 19 Oct 2013
Posts: 503
Location: Kuwait
GPA: 3.2
WE: Engineering (Real Estate)
GMAT ToolKit User CAT Tests
Re: At a retail shop, the price of a pencil was $0.20 more than the price  [#permalink]

Show Tags

New post 23 Oct 2018, 02:41
1
Hi philipssonicare

As I wrote in my post, Revenue of Erases = e * x

We know p = 0.20 + e

now from statement 1) we know x = y + 10

From statement 2) we know 30 = p * y

For the second statement it can be rearranged to 30 = (0.20 + e) * y

Now even if I combine both I get 30 = (0.20 + e) (x -10)

I have one equation and two variables.

I hope this helps.
GMAT Club Bot
Re: At a retail shop, the price of a pencil was $0.20 more than the price &nbs [#permalink] 23 Oct 2018, 02:41
Display posts from previous: Sort by

At a retail shop, the price of a pencil was $0.20 more than the price

  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®.