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

It is currently 01 Aug 2014, 20:52

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

How many points

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
User avatar
Joined: 21 Mar 2004
Posts: 445
Location: Cary,NC
Followers: 2

Kudos [?]: 5 [0], given: 0

GMAT Tests User
How many points [#permalink] New post 16 Jun 2005, 06:26
Can someone tell a short way of solving this ?
Attachments

how_many_points.jpg
how_many_points.jpg [ 13.63 KiB | Viewed 359 times ]


_________________

ash
________________________
I'm crossing the bridge.........

CEO
CEO
avatar
Joined: 15 Aug 2003
Posts: 3470
Followers: 59

Kudos [?]: 661 [0], given: 781

 [#permalink] New post 16 Jun 2005, 06:40
equation of the line is y = 3/5 x + 30

for any x thats a multiple of 5, y is an integer.

Maximum x is 50. thus there are 11 x's for which y is an integer.

Thus there are 11 pairs.
Senior Manager
Senior Manager
User avatar
Joined: 21 Mar 2004
Posts: 445
Location: Cary,NC
Followers: 2

Kudos [?]: 5 [0], given: 0

GMAT Tests User
 [#permalink] New post 16 Jun 2005, 06:45
I was hoping for a shorter method......:)

BTW I used the same way as above to get the answer.
_________________

ash
________________________
I'm crossing the bridge.........

Senior Manager
Senior Manager
avatar
Joined: 30 May 2005
Posts: 374
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
 [#permalink] New post 16 Jun 2005, 07:08
The equation is x/50 + y/30 = 1 or

y=(150-3x)/5

For y to be an integer with x also as an integer, x has to be zero or a multiple of 5.

y can be 30,27,24,..,0 or 11 values
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 155 [0], given: 2

GMAT Tests User
 [#permalink] New post 16 Jun 2005, 07:40
I get 10...how do we get 11?
SVP
SVP
User avatar
Joined: 05 Apr 2005
Posts: 1736
Followers: 3

Kudos [?]: 29 [0], given: 0

GMAT Tests User
Re: How many points [#permalink] New post 16 Jun 2005, 17:30
y = mx + c
m = -30/50 = -3/5
y = (-3/5) x + c
the integer co-ordinates of x that are divided by 5 are 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50. so there are 11.
Re: How many points   [#permalink] 16 Jun 2005, 17:30
    Similar topics Author Replies Last post
Similar
Topics:
How many points on the circumference of a circle represented ritula 7 27 Jun 2008, 03:39
S is a set of points in the plane. How many distinct puma 3 23 May 2008, 10:52
1 Experts publish their posts in the topic S is a set of points in the plane. How many distinct GGUY 2 14 Mar 2008, 23:41
How many points is realistic to improve each week? Duffer 0 06 Nov 2006, 08:10
In the figure above, how many of the points on line segment mandy 5 17 Jun 2005, 14:38
Display posts from previous: Sort by

How many points

  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®.