It is currently 14 Dec 2017, 14:43

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

Events & Promotions in June
Open Detailed Calendar

Each shelf of a bookcase contained 12 books. If the librarian took out

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

Hide Tags

Intern
Intern
avatar
Joined: 09 Dec 2008
Posts: 27

Kudos [?]: 92 [0], given: 2

Location: Vietnam
Schools: Somewhere
Each shelf of a bookcase contained 12 books. If the librarian took out [#permalink]

Show Tags

New post 04 Aug 2010, 19:31
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

75% (01:52) correct 25% (00:54) wrong based on 28 sessions

HideShow timer Statistics

Each shelf of a bookcase contained 12 books. If the librarian took out 21 books and rearranged the remaining books so that all shelves but one contained 8 books and the last shelf contained 11 books, how many shelves does the bookcase have?


* 5
* 6
* 7
* 8
* 9

(C) 2008 GMAT Club - m09#13


Gmatclub manager,
Should the question be "the librarian took out 21 books and rearranged the remaining books so that each shelf contained 8 books and the last shelf contained 11 books"?

Thanks !
[Reveal] Spoiler: OA

Kudos [?]: 92 [0], given: 2

1 KUDOS received
Manager
Manager
avatar
Joined: 20 Mar 2010
Posts: 83

Kudos [?]: 110 [1], given: 1

Re: Each shelf of a bookcase contained 12 books. If the librarian took out [#permalink]

Show Tags

New post 04 Aug 2010, 19:48
1
This post received
KUDOS
dungtd wrote:
Each shelf of a bookcase contained 12 books. If the librarian took out 21 books and rearranged the remaining books so that all shelves but one contained 8 books and the last shelf contained 11 books, how many shelves does the bookcase have?

(C) 2008 GMAT Club - m09#13

* 5
* 6
* 7
* 8
* 9

Gmatclub manager,
Should the question be "the librarian took out 21 books and rearranged the remaining books so that each shelf contained 8 books and the last shelf contained 11 books"?

Thanks !
.

The wording in the question is correct . If the "but one" is omitted like you mentioned, the details contradict with each other. If each shelf contains 8 books,last shelf also must contain 8 books and can't contain 11 books.
The "but one" indicates that each shelf except the last shelf has 8 books and the last shelf has 11 books.
Here is how we can solve the problem.

Let x be the number of shelves.
No of books in the beginning =12*x
After taking out 21 books No of remaining books = 12x -21
when the remaining books are rearranged, each shelf except the last shelf has 8 books and the last shelf has 11 books. So No of remaining books is also equal to 8*(x-1)+11

12x-21=8(x-1)+11
4x=24
x=6. Answer B
_________________

___________________________________
Please give me kudos if you like my post

Kudos [?]: 110 [1], given: 1

Intern
Intern
avatar
Joined: 09 Dec 2008
Posts: 27

Kudos [?]: 92 [0], given: 2

Location: Vietnam
Schools: Somewhere
Re: Each shelf of a bookcase contained 12 books. If the librarian took out [#permalink]

Show Tags

New post 04 Aug 2010, 20:41
1
This post was
BOOKMARKED
crack700 wrote:
dungtd wrote:
Each shelf of a bookcase contained 12 books. If the librarian took out 21 books and rearranged the remaining books so that all shelves but one contained 8 books and the last shelf contained 11 books, how many shelves does the bookcase have?

(C) 2008 GMAT Club - m09#13

* 5
* 6
* 7
* 8
* 9

Gmatclub manager,
Should the question be "the librarian took out 21 books and rearranged the remaining books so that each shelf contained 8 books and the last shelf contained 11 books"?

Thanks !
.

The wording in the question is correct . If the "but one" is omitted like you mentioned, the details contradict with each other. If each shelf contains 8 books,last shelf also must contain 8 books and can't contain 11 books.
The "but one" indicates that each shelf except the last shelf has 8 books and the last shelf has 11 books.
Here is how we can solve the problem.

Let x be the number of shelves.
No of books in the beginning =12*x
After taking out 21 books No of remaining books = 12x -21
when the remaining books are rearranged, each shelf except the last shelf has 8 books and the last shelf has 11 books. So No of remaining books is also equal to 8*(x-1)+11

12x-21=8(x-1)+11
4x=24
x=6. Answer B


Thanks for your explanation!

Kudos [?]: 92 [0], given: 2

Manager
Manager
User avatar
Joined: 27 Jun 2008
Posts: 76

Kudos [?]: 18 [0], given: 22

Location: United States (AL)
Concentration: General Management, Technology
GMAT 1: 660 Q48 V34
WE: Consulting (Computer Software)
Re: Each shelf of a bookcase contained 12 books. If the librarian took out [#permalink]

Show Tags

New post 04 Aug 2010, 22:09
B for me as well,, nice explanation crack700

Kudos [?]: 18 [0], given: 22

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 14842

Kudos [?]: 287 [0], given: 0

Premium Member
Re: Each shelf of a bookcase contained 12 books. If the librarian took out [#permalink]

Show Tags

New post 18 Feb 2017, 22:32
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

Kudos [?]: 287 [0], given: 0

Re: Each shelf of a bookcase contained 12 books. If the librarian took out   [#permalink] 18 Feb 2017, 22:32
Display posts from previous: Sort by

Each shelf of a bookcase contained 12 books. If the librarian took out

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


GMAT Club MBA Forum Home| About| Terms and Conditions| 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®.