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What is the sum of all of the integers in the chart above?

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What is the sum of all of the integers in the chart above? [#permalink]  15 Jan 2012, 15:10
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75% (03:18) correct 25% (01:57) wrong based on 0 sessions
Guys - please see attached. can you please let me know what is the underlying concept behind to solve this and what will be the answer? I don't have an OA unfortunately.

Attachment:

111.JPG [ 15.19 KiB | Viewed 685 times ]
What is the sum of all of the integers in the chart above?

A. 0
B. 300
C. 500
D. 1500
E. 6500
[Reveal] Spoiler: OA

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E.

MGMAT 1 --> 530
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MGMAT 3 ---> 610

Last edited by Bunuel on 15 Jan 2012, 16:12, edited 3 times in total.
Edited the question and added the chart
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Re: Sum in the chart [#permalink]  15 Jan 2012, 15:26
What is the question that was asked?
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Re: Sum in the chart [#permalink]  15 Jan 2012, 15:27
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enigma123 wrote:
Guys - please see attached. can you please let me know what is the underlying concept behind to solve this and what will be the answer? I don't have an OA unfortunately.

What is the sum of all of the integers in the chart above?

A. 0
B. 300
C. 500
D. 1500
E. 6500

Reorder the numbers in columns in ascending absolute value:
Attachment:

untitled.JPG [ 15.23 KiB | Viewed 692 times ]
Now, it's easy to spot that the numbers in each column represent an equally spaced set (AP) and the sum in each can be found by mean*# of terms:

Sum=5*100+5*(-200)+5*(300)+5*(-400)+5*(500)=500-1,000+1,500-2,000+2,500=1,500.

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Status: Preparing for the 4th time -:(
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Kudos [?]: 63 [0], given: 212

Re: Sum in the chart [#permalink]  15 Jan 2012, 15:29
Sorry Bunuel. The question is What is the sum of all of the integers in the chart above?
_________________

Best Regards,
E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610

GMAT Club team member
Joined: 02 Sep 2009
Posts: 11534
Followers: 1795

Kudos [?]: 9559 [0], given: 826

Re: Sum in the chart [#permalink]  15 Jan 2012, 15:39
enigma123 wrote:
Sorry Bunuel. The question is What is the sum of all of the integers in the chart above?

Yes, I guessed so and that's exactly the question I answered in my previous post.

P.S. Edited the question in your initial post and added the chart.
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Director
Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
Posts: 558
Location: United Kingdom
GMAT Date: 06-22-2012
GPA: 2.9
WE: Information Technology (Consulting)
Followers: 8

Kudos [?]: 63 [0], given: 212

Re: Sum in the chart [#permalink]  15 Jan 2012, 15:42
Absolutely and many thanks. As always, thorough and a very helpful answer.
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Best Regards,
E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610

Re: Sum in the chart   [#permalink] 15 Jan 2012, 15:42
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