It is currently 21 Sep 2017, 03:52

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

Tough PS1

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
User avatar
Joined: 14 May 2009
Posts: 191

Kudos [?]: 48 [0], given: 1

Schools: Stanford, Harvard, Berkeley, INSEAD
Tough PS1 [#permalink]

Show Tags

New post 03 Jun 2009, 17:04
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Ezekiel is brewing his magic potions, and needs to label his flasks. He can use either 1, 2 or 3 colours to uniquely identify his flasks, and different orderings of colour do not signify distinctiveness. If he has 800 flasks that he needs to uniquely label, what is the minimum number of colours Ezekiel will need to label his flasks?

(1) 3
(2) 7
(3) 11
(4) 17
(5) 800




Enjoy.
_________________

Hades

Kudos [?]: 48 [0], given: 1

SVP
SVP
User avatar
Joined: 29 Aug 2007
Posts: 2473

Kudos [?]: 832 [0], given: 19

Re: Tough PS1 [#permalink]

Show Tags

New post 03 Jun 2009, 18:56
Hades wrote:
Ezekiel is brewing his magic potions, and needs to label his flasks. He can use either 1, 2 or 3 colours to uniquely identify his flasks, and different orderings of colour do not signify distinctiveness. If he has 800 flasks that he needs to uniquely label, what is the minimum number of colours Ezekiel will need to label his flasks?

(1) 3
(2) 7
(3) 11
(4) 17
(5) 800
Enjoy.


D. 17c1 + 17c2 + 17c3 = 17 + 136 + 680 = 833
_________________

Verbal: http://gmatclub.com/forum/new-to-the-verbal-forum-please-read-this-first-77546.html
Math: http://gmatclub.com/forum/new-to-the-math-forum-please-read-this-first-77764.html
Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html


GT

Kudos [?]: 832 [0], given: 19

Senior Manager
Senior Manager
User avatar
Joined: 15 Jan 2008
Posts: 281

Kudos [?]: 47 [0], given: 3

Re: Tough PS1 [#permalink]

Show Tags

New post 04 Jun 2009, 02:00
my approach..

with 11, the maximum he wud get is 11+55=165..

so the number has to be greater than 11 and hence the answer shud be 17..

Kudos [?]: 47 [0], given: 3

Intern
Intern
avatar
Joined: 12 May 2009
Posts: 47

Kudos [?]: 3 [0], given: 1

Location: Mumbai
Re: Tough PS1 [#permalink]

Show Tags

New post 04 Jun 2009, 04:49
IMO D; Same approach as GMAT Tiger!!

Kudos [?]: 3 [0], given: 1

Senior Manager
Senior Manager
User avatar
Joined: 16 Jan 2009
Posts: 360

Kudos [?]: 226 [0], given: 16

Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Re: Tough PS1 [#permalink]

Show Tags

New post 04 Jun 2009, 12:46
17c1 + 17c2 + 17c3
=833
IMO D
_________________

Lahoosaher

Kudos [?]: 226 [0], given: 16

Re: Tough PS1   [#permalink] 04 Jun 2009, 12:46
Display posts from previous: Sort by

Tough PS1

  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®.