GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 01 Apr 2020, 02:05

### 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

# What is the sum of the integers in the table above?

Author Message
TAGS:

### Hide Tags

Manager
Joined: 20 Mar 2015
Posts: 53
Re: What is the sum of the integers in the table above?  [#permalink]

### Show Tags

25 Jun 2016, 00:00
Baten80 wrote:
Attachment:
Table.jpg

What is the sum of the integers in the table above?

(A) 28
(B) 112
(C) 336
(D) 448
(E) 784

Sum of first row is 28.
Sum of second row is -56.
Sum of third row is 84.
By this point I realized the rows are in multiples of 28.

difference between first and second row is -28. likewise, difference of 3-4 row and 5-6 row will be -28, -28.
28 * 7 = 196
-28 * 3 = -84.
196 + (-84) = 112.
Intern
Joined: 02 Mar 2018
Posts: 5
Re: What is the sum of the integers in the table above?  [#permalink]

### Show Tags

13 Mar 2018, 18:13
jlgdr wrote:
Baten80 wrote:
Attachment:
Table.jpg

What is the sum of the integers in the table above?

(A) 28
(B) 112
(C) 336
(D) 448
(E) 784

I think the best way to solve this type of problems is to try to cancel out some of the numbers before operating since you have positives and negatives.
I quickly realized that lines 1,3 and 4 could cancel out. Then by combining lines 5,6 and 7 you get the same numbers in line 6 but with different signs. So you can actually then combine that one with line 2 and just get a series of multiples by 4 starting with 4+8+12....+28.

So 7 terms average 16 = 112

It seems more complicated than it really is. I guess one could find other patterns and even cancel something else out, but you should not overthink it.
At least cancel 2/3 lines and then you can start adding/subtracting to get another evenly spaced set of numbers.

Hope it helps

Sent from my MI 5 using GMAT Club Forum mobile app
Intern
Joined: 23 Nov 2018
Posts: 28
Re: What is the sum of the integers in the table above?  [#permalink]

### Show Tags

20 Nov 2019, 05:06
I approached this problem in a very different way so that I only have to add numbers
The sum of every column is a multiple of 4. And it increases from the 1st to the 7th column (4,8,12,16,20,24,28) I added them up. You can also use the formula avg*7=16*7

Baten80 wrote:

What is the sum of the integers in the table above?

(A) 28
(B) 112
(C) 336
(D) 448
(E) 784

Attachment:
Table.jpg
Re: What is the sum of the integers in the table above?   [#permalink] 20 Nov 2019, 05:06

Go to page   Previous    1   2   [ 23 posts ]

Display posts from previous: Sort by