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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Question:- will this get completed in a time span of 2 mins?

It will.

+ x y z 4 1 -5 m e 7 n 10 f 2 -4 5

Take an aggressive approach. First find out what you want to know: m + n m = 4 + z and n = e + y so you need 4 + z + e + y

Now, y is simple. 4 + y = -5 so y = -9 e and z are trickier. Looking at the 2nd column, if I have x, I can find e. x is simple. 4 + x = 1 so x = -3 Now, e + x = 7 which means e -3 = 7 so e = 10 Only z remains. e + z = 10 so 10 + z = 10 giving me z = 0 I have all I needed. 4 + z + e + y = 4 + 0 + 10 -9 = 5
_________________

Re: In the addition table shown above, what is the value of m+n [#permalink]

Show Tags

30 Jan 2011, 10:17

1

This post received KUDOS

the simplest way to do this is through a series of successive substitutions. whenever there's a () in the working below, it means i have substituted a value that i found in an earlier step.

How will I know that The sum of some value from the first row and and some value from the first column is given in the intersection box of these values. What is the mechanism?
_________________

How will I know that The sum of some value from the first row and and some value from the first column is given in the intersection box of these values. What is the mechanism?

This is a 3 by 3 matrix.

If you to really see how this works, paste the table in an excel - some value is the value on the intersection of 1st row and 1st column /1st row and 2nd column/1st row and 3rd column/1st row and 4th column/2nd row and 2nd columns/... and so on: That will be the sum of the other two values

eg: 1st row and 2nd column : x,4 --> 1, so x+4=1 1st row and 3rd column : y,4 --> -5, so y+4=-5 ....so on

Hope it makes sense now.
_________________

Labor cost for typing this post >= Labor cost for pushing the Kudos Button http://gmatclub.com/forum/kudos-what-are-they-and-why-we-have-them-94812.html

How will I know that The sum of some value from the first row and and some value from the first column is given in the intersection box of these values. What is the mechanism?

If you are not aware of the concept of 'addition table', the mechanism isn't intuitive. It might take some time to figure out. On the bright side, you now know the mechanism behind an addition table and if some other such concept does crop up in your actual GMAT, they will explain you how to arrive at the values. Very rarely will you see ambiguity in actual GMAT questions (If it does arise, they are quick to fix it.) So just know what this concept is and move on.
_________________

Re: In the addition table shown above, what is the value of m+n [#permalink]

Show Tags

12 Nov 2011, 11:56

So I took the GMAT prep today, for the first time, and despite scoring Q50, I was totally baffled by this question.

In hindsight, it is actually very simple, but it showed up as my second quant question. I have no clue what an addition table is and I just started at the damn matrix for a minute not even sure where to begin.

Almost derailed my test, but fortunately I pulled it together. But yea, if you have no idea what an addition table is, then this question is not intuitive.

After reading the first line explaining what is meant by an addition table, I quickly solved this in under 100 seconds. Damn!

This is called an addition table. An addition table is where numbers in the first row get added to numbers in the first column to give the results given in the grid e.g. 4 + X = 1, E + Y = N etc.

Re: In the addition table shown above, what is the value of m+n [#permalink]

Show Tags

26 Apr 2012, 18:24

Q # 2 on my GMAT Prep test # 1... spent 5 minutes trying to figure it out and still couldn't. Now I am worrying more than ever about such ridiculous questions....

Q # 2 on my GMAT Prep test # 1... spent 5 minutes trying to figure it out and still couldn't. Now I am worrying more than ever about such ridiculous questions....

You don't have to worry. If this question was a part of GMAT at some time, it was a very very long time back. GMAT has been evolving and now if they use a term such as 'addition table', they are not going to assume that you know what it is. They will explain you what an addition table is i.e. they will tell you something like this" "An addition table is where numbers in the first row get added to numbers in the first column to give the results given in the grid e.g. 4 + X = 1, E + Y = N etc." The stats related to every question are monitored and if they see inconsistencies, they filter them out e.g. if they see people getting more than Q49 but sitting on this 500 - 600 level question for 5 mins, they will figure out why and take action. In GMAT, the intent of the question will be very clear. You will only have to worry about 'how to get the answer' not 'what do they want'.
_________________

Re: In the addition table shown above, what is the value of m+n [#permalink]

Show Tags

23 Sep 2012, 23:28

m = z + 4 and n = y + e so to find m+ n we need values of z,y,e x + 4 = 1 => x = -3 x + e= 7 => e = 7 - x = 10 z + e = 10 => z = 10 -e = 0 y + 4 = -5 => y = -9

So, m = z+ 4 = 0 + 4 =4 n = y + e = -9 + 10 = 1 so, m+n=5

Re: In the addition table shown above, what is the value of m+n [#permalink]

Show Tags

15 Jan 2013, 01:50

2

This post received KUDOS

Attachment:

addition table.jpg [ 20.45 KiB | Viewed 14906 times ]

We do not have to calculate value of any variable here. The solution can be simplified as below: m=z+4 and n=y+e Hence m+n = z+4+y+e = (y+4) + (z+e) From yellow cell (y+4) = -5 From green cell (z+e) = 10

It’s quickly approaching two years since I last wrote anything on this blog. A lot has happened since then. When I last posted, I had just gotten back from...

Since my last post, I’ve got the interview decisions for the other two business schools I applied to: Denied by Wharton and Invited to Interview with Stanford. It all...

Marketing is one of those functions, that if done successfully, requires a little bit of everything. In other words, it is highly cross-functional and requires a lot of different...