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

 It is currently 25 Jun 2016, 02:13

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

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Progression

Author Message
TAGS:

Hide Tags

Intern
Joined: 12 Apr 2010
Posts: 13
Followers: 0

Kudos [?]: 11 [0], given: 0

Show Tags

25 Apr 2010, 12:22
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 2 sessions

HideShow timer Statistics

The Sum of 3rd & 15th elements of an AP is equal to the sum of 6th 11th &13th elements of the same AP then which of the series should necessarily be equal to zero.

a)1st
b)9th
c)12th
d)3rd
e)15th
CEO
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2797
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 218

Kudos [?]: 1446 [0], given: 235

Show Tags

25 Apr 2010, 12:27
ISB2011 wrote:
The Sum of 3rd & 15th elements of an AP is equal to the sum of 6th 11th &13th elements of the same AP then which of the series should necessarily be equal to zero.

a)1st
b)9th
c)12th
d)3rd
e)15th

IMO C

as per question take 1st term as a and difference as d

a+2d + a+14d = a+5d + a+10d + a+12d

=> a+11d = 0 which is the 12th term
a+11d = a+(n-1)d => n-1 = 11 => n =12
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned

Jo Bole So Nihaal , Sat Shri Akaal

GMAT Club Premium Membership - big benefits and savings

Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html

Re: Progression   [#permalink] 25 Apr 2010, 12:27
Similar topics Replies Last post
Similar
Topics:
6 If the sum of the 4th term and the 12th term of an arithmetic progress 6 30 Jul 2015, 11:11
11 Four terms in arithmetic progression have sum of 28. Product 7 05 Jan 2014, 03:32
14 In an arithmetic progression the difference between the any 12 19 Jul 2011, 05:36
1 Arithmatic Progression Problem - Advise is Needed 4 02 Aug 2010, 00:09
1 G progression-gmat prep 3 18 Apr 2010, 11:21
Display posts from previous: Sort by