NEW HERE? LEARN MORE
closeclose
Last visit was: 14 May 2024, 12:04 It is currently 14 May 2024, 12:04
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

If a stationery shop sells notebooks in A-4 size and A-5 size paper

User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 93259
Own Kudos [?]: 623743 [1]
Given Kudos: 81862
Send PM
CAT Tests Forum Quiz Mode
If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink] New post   29 Oct 2018, 04:43
1
Bookmarks
Expert Reply
00:00
A
B
C
D
E

Difficulty:

15% (low)

Question Stats:

100% (00:51) correct 0% (00:00) wrong based on 32 sessions
Hide Show timer Statistics
If a stationery shop sells notebooks in A-4 size and A-5 size paper, what is the price of a A-5 size notebooks?

(1) The total price of one A-4 size and one A-5 size notebooks is $4.
(2) The total price of three A-4 size and one A-5 size notebooks is $9

Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
ShowHide Answer
Official Answer
C
User avatar
P
DavidTutorexamPAL
examPAL Representative
Joined: 07 Dec 2017
Posts: 1050
Own Kudos [?]: 1783 [0]
Given Kudos: 26
Send PM
Re: If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink] New post   29 Oct 2018, 05:27
Bunuel wrote:
If a stationery shop sells notebooks in A-4 size and A-5 size paper, what is the price of a A-5 size notebooks?

(1) The total price of one A-4 size and one A-5 size notebooks is $4.
(2) The total price of three A-4 size and one A-5 size notebooks is $9


We'll translate our statements into equations to make them easier to interpret.
This is a Precise approach.

(1) A4 + A5 = 4. This doesn't let us solve for A5.
Insufficient.

(2) 3A4 + A5 = 9. As abover, 1 equation with 2 variables - insufficient.
Insufficient.

Combined.
2 equations with 2 variables - sufficient!
(C) is our answer.
User avatar
L
Chethan92
Director
Director
Joined: 18 Jul 2018
Posts: 926
Own Kudos [?]: 1302 [0]
Given Kudos: 95
Location: India
Concentration: Operations, General Management
Schools: IIMB EPGP'22 (M)
GMAT 1: 590 Q46 V25
GMAT 2: 690 Q49 V34
WE:Engineering (Energy and Utilities)
Send PM
Reviews Badge
Re: If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink] New post   29 Oct 2018, 05:31
From statement 1:

\(P_{A4} + P_{A5} = 4$\).
Two unknowns and one equation.
Insufficient.

From statement 2:

\(3P_{A4} + P_{A5} = 9$\).
Again, Two unknowns and one equation.
Insufficient.

Combining both.

Subtracting equation of S1 from S2.

\(2P_{A4} = 5\)

or \(P_{A4} = 2.5$\)

Then \(P_{A5} = 1.5$\)
Sufficient.

C is the answer.
avatar
B
Md231
Intern
Intern
Joined: 20 Sep 2018
Posts: 34
Own Kudos [?]: 5 [0]
Given Kudos: 8
Send PM
Re: If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink] New post   29 Oct 2018, 16:23
Bunuel wrote:
If a stationery shop sells notebooks in A-4 size and A-5 size paper, what is the price of a A-5 size notebooks?

(1) The total price of one A-4 size and one A-5 size notebooks is $4.
(2) The total price of three A-4 size and one A-5 size notebooks is $9




1. x+y=4. Insufficient.
2. 3x+y=9. Insufficient.
Together, it can be easily solved for x and y.
C.

Too easy to be true, Am I missing something?
User avatar
G
Salsanousi
Senior Manager
Senior Manager
Joined: 19 Oct 2013
Posts: 411
Own Kudos [?]: 309 [0]
Given Kudos: 117
Location: Kuwait
GPA: 3.2
WE:Engineering (Real Estate)
Send PM
GMAT ToolKit User
Re: If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink] New post   29 Oct 2018, 16:45
Md231 I initially felt the same, but I don’t think you’re missing out on anything. The question seems to be straightforward.

Posted from my mobile device
User avatar
B
ankitnoida2018
Intern
Intern
Joined: 08 Jul 2017
Posts: 41
Own Kudos [?]: 13 [0]
Given Kudos: 7
Schools: Fisher '19 Boston U '20 Duke '20
GMAT 1: 740 Q51 V38
Send PM
Reviews Badge
Re: If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink] New post   02 Nov 2018, 00:02
If a stationery shop sells notebooks in A-4 size and A-5 size paper, what is the price of a A-5 size notebooks?

(1) The total price of one A-4 size and one A-5 size notebooks is $4.
(2) The total price of three A-4 size and one A-5 size notebooks is $9

Statement 1 and 2 each give an equation each in the two prices. Hence, each alone is insufficient. However, on combining, as the two equations are exclusive, they can be combined to get unique values of each price. No need to solve to save time.

C.

Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
gmatclubot
Re: If a stationery shop sells notebooks in A-4 size and A-5 size paper [#permalink]
02 Nov 2018, 00:02
Moderators:
Bunuel
Math Expert
93259 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3136 posts
GMATBusters
GMAT Tutor
1904 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions