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

It is currently 11 Dec 2018, 12:49

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 December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • Free GMAT Prep Hour

     December 11, 2018

     December 11, 2018

     09:00 PM EST

     10:00 PM EST

    Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST.
  • The winning strategy for 700+ on the GMAT

     December 13, 2018

     December 13, 2018

     08:00 AM PST

     09:00 AM PST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

20 books, each on a different subject, are placed on a shelf

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

Hide Tags

DS Forum Moderator
avatar
P
Joined: 21 Aug 2013
Posts: 1412
Location: India
Premium Member
20 books, each on a different subject, are placed on a shelf  [#permalink]

Show Tags

New post 23 Feb 2018, 23:12
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

67% (01:53) correct 33% (01:38) wrong based on 33 sessions

HideShow timer Statistics

20 books, each on a different subject, are placed on a shelf from left to right. The books are labelled numerically from '1' to '20' respectively in increasing order from left to right, such that the leftmost book is labelled number '1' while the rightmost book is labelled number '20'. Out of these 20 books, there is also a Physics book, a Mathematics book and a Philosophy book. What is the label number on the Mathematics book?

(1) Exactly 1 book is placed between the Physics book and the Philosophy book, while exactly 2 books are placed between the Philosophy book and the Mathematics book. Physics book has label number '15'.

(2) Philosophy book has label number '17'.
examPAL Representative
User avatar
G
Joined: 07 Dec 2017
Posts: 841
20 books, each on a different subject, are placed on a shelf  [#permalink]

Show Tags

New post 24 Feb 2018, 01:59
amanvermagmat wrote:
20 books, each on a different subject, are placed on a shelf from left to right. The books are labelled numerically from '1' to '20' respectively in increasing order from left to right, such that the leftmost book is labelled number '1' while the rightmost book is labelled number '20'. Out of these 20 books, there is also a Physics book, a Mathematics book and a Philosophy book. What is the label number on the Mathematics book?

(1) Exactly 1 book is placed between the Physics book and the Philosophy book, while exactly 2 books are placed between the Philosophy book and the Mathematics book. Physics book has label number '15'.

(2) Philosophy book has label number '17'.


We'll use a drawing to help us understand the different arrangements.
This is an Alternative approach.

(1) So, putting the math book on different sides of the philosophy book we can have
15:Physics 16:? 17:Philosophy 18:? 19:? 20:Math or
14:Math 15:Physics 16:? 17:Philosophy.
Insufficient!

(2) This is clearly insufficient as it says nothing about the math book.
Insufficient!

Combined:
We still can't separate between the two options given above.
Insufficient.

(E) is our answer
_________________

Image
Sign up for 7-day free trial
Image

GMAT Club Bot
20 books, each on a different subject, are placed on a shelf &nbs [#permalink] 24 Feb 2018, 01:59
Display posts from previous: Sort by

20 books, each on a different subject, are placed on a shelf

  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®.