Find all School-related info fast with the new School-Specific MBA Forum

It is currently 18 Sep 2014, 15:55

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Six points lie on the circumference of a circle. What is the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 05 Oct 2008
Posts: 273
Followers: 3

Kudos [?]: 44 [0], given: 22

GMAT Tests User
Six points lie on the circumference of a circle. What is the [#permalink] New post 05 Oct 2009, 05:11
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

79% (01:48) correct 21% (01:56) wrong based on 65 sessions
Six points lie on the circumference of a circle. What is the positive difference between the number of triangles and the number of quadrilaterals that can be created by connecting these points?

A. 4
B. 5
C. 6
D. 15
E. 20
[Reveal] Spoiler: OA

Last edited by Bunuel on 16 Aug 2014, 06:34, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
Senior Manager
Senior Manager
avatar
Joined: 23 Jun 2009
Posts: 359
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Followers: 5

Kudos [?]: 95 [0], given: 60

GMAT Tests User
Re: Six points lie on the circumference of a circle. What is the [#permalink] New post 05 Oct 2009, 05:43
6c3-6c4=6.5.4/3.2.1-6.5.4.3/4.3.2.1=20-15=5
SVP
SVP
User avatar
Joined: 09 Sep 2013
Posts: 2420
Followers: 196

Kudos [?]: 38 [0], given: 0

Premium Member
Re: Six points lie on the circumference of a circle. What is the [#permalink] New post 16 Aug 2014, 06:06
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

Manager
Manager
avatar
Joined: 21 Oct 2013
Posts: 186
Location: Germany
Concentration: Accounting, International Business
GPA: 3.91
Followers: 0

Kudos [?]: 13 [0], given: 19

Six points lie on the circumference of a circle. What is the [#permalink] New post 25 Aug 2014, 21:19
Let's start with the triangle: You have 6 points to choose from but only 3 points you will connect and 3 points you will not connect.

Hence number of possibilities for triangle: 6! / 3! * 3! = 20

Same goes for the quadrilateral: 6 points to choose from, 4 points which you will connect and 2 points which you won't connect.

Number of possibilities for quadrilateral: 6! / 4! * 2! = 15

Difference = 5

Answer B
Director
Director
User avatar
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 925
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Followers: 6

Kudos [?]: 237 [0], given: 167

Re: Six points lie on the circumference of a circle. What is the [#permalink] New post 25 Aug 2014, 22:49
\frac{6!}{3!3!} - \frac{6!}{4!2!} = 20 - 15 = 5

Answer = B
_________________

Kindly press "+1 Kudos" to appreciate :)

Re: Six points lie on the circumference of a circle. What is the   [#permalink] 25 Aug 2014, 22:49
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Four points that form a polygon lie on the circumference of mist3rh 2 12 Mar 2012, 06:07
3 Experts publish their posts in the topic If points A, B, and C lie on a circle of radius 1, what is zaur2010 14 19 Mar 2011, 12:20
9 Experts publish their posts in the topic Points A, B, and C lie on a circle of radius 1. What is the Economist 18 27 Sep 2009, 08:00
Experts publish their posts in the topic Points A, B, and C lie on a circle of radius. What is the bmwhype2 5 19 Nov 2007, 05:42
What is the circumference of the circle above? (1) The Rupstar 3 26 Apr 2005, 09:37
Display posts from previous: Sort by

Six points lie on the circumference of a circle. What is the

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.