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

It is currently 22 Oct 2014, 19:59

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

For any positive integer n, the sum of the first n positive

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 10 Oct 2008
Posts: 14
Followers: 0

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

For any positive integer n, the sum of the first n positive [#permalink] New post 17 Oct 2008, 09:09
For any positive integer n, the sum of the first n positive integers equals [n(n+1)]/2. What is the sum of all the even integers between 99 and 301?

A. 10,100
B. 20,200
C. 22,650
D. 40,200
E. 45,150
SVP
SVP
avatar
Joined: 17 Jun 2008
Posts: 1578
Followers: 12

Kudos [?]: 186 [0], given: 0

Re: sum [#permalink] New post 17 Oct 2008, 11:48
B.

Required sum = 100 + 102 + 104+.....+300
= 2(50 + 51 + 52 + .......+150)
=2(sum of integers from 1 to 150 - sum of integers from 1 to 49)
=2*150*151/2 - 2*49*50/2 = 20200.
Re: sum   [#permalink] 17 Oct 2008, 11:48
    Similar topics Author Replies Last post
Similar
Topics:
28 Experts publish their posts in the topic For any positive integer n, the sum of the first n positive gwiz87 16 19 Feb 2012, 18:19
11 Experts publish their posts in the topic For any positive integer n, the sum of the first n positive niheil 7 15 Nov 2010, 15:34
13 Experts publish their posts in the topic For any positive integer n, the sum of the first n positive CharmWithSubstance 8 11 May 2010, 14:57
For any positive integer n, the sum of the first n positive nick_sun 3 11 Jun 2007, 07:16
For any positive integer n, the sum of the first n positive karovd 3 01 Nov 2004, 07:12
Display posts from previous: Sort by

For any positive integer n, the sum of the first n positive

  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®.