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addition problem from gmat prep Q#2

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asadullah100
 Post subject: addition problem from gmat prep Q#2
 Post Posted: Fri Nov 06, 2009 9:56 am 
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Students


Posts: 2
i am having problem to solve it... kindly guide me the technique to solve it... thanks..

what is the value of m+n?

+ | x y z

4 | 1 -5 m

e | 7 n 10

f | 2 -4 5
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lalitkc
 Post subject: Re: addition problem from gmat prep Q#2
 Post Posted: Sat Nov 07, 2009 1:16 am 
Offline
Students


Posts: 11
what is the value of m+n?

+ | x y z

4 | 1 -5 m

e | 7 n 10

f | 2 -4 5


4 + x = 1 => x = -3
e+ x = 7 => e = 10
f + x = 2 => f = 5
f + y = -4 => y = -9
e + z = 10 => z = 0
e + y = n => n = 1
4 + z = m => m = 4
m + n = 5
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RonPurewal
 Post subject: Re: addition problem from gmat prep Q#2
 Post Posted: Fri Dec 18, 2009 5:31 am 
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ManhattanGMAT Staff


Posts: 7146
lalitkc wrote:
what is the value of m+n?

+ | x y z

4 | 1 -5 m

e | 7 n 10

f | 2 -4 5


4 + x = 1 => x = -3
e+ x = 7 => e = 10
f + x = 2 => f = 5
f + y = -4 => y = -9
e + z = 10 => z = 0
e + y = n => n = 1
4 + z = m => m = 4
m + n = 5


yes.

to the original poster: PLEASE POST THE ENTIRE PROBLEM, INCLUDING ALL FIVE ANSWER CHOICES. this is part of the forum rules.

it is weird that they'd expect you to know what an "addition table" is. i haven't seen one of those since third grade.
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RB_51273
 Post subject: Re: addition problem from gmat prep Q#2
 Post Posted: Mon Dec 21, 2009 3:00 pm 
Offline
Students


Posts: 22
Hi Ron,
I too came across this problem on gmat prep.The flwg are the choices
a)-19
b)4
c)5
d)6
e)22

I have got screen shot of this but attaching at present

Thanks

Ram
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RonPurewal
 Post subject: Re: addition problem from gmat prep Q#2
 Post Posted: Sat Jan 09, 2010 5:10 am 
Offline
ManhattanGMAT Staff


Posts: 7146
RB_51273 wrote:
Hi Ron,
I too came across this problem on gmat prep.The flwg are the choices
a)-19
b)4
c)5
d)6
e)22

I have got screen shot of this but attaching at present

Thanks

Ram


ok yeah, i recently saw this on gmatprep, too. it's still strange that they expect you to know how to use this table, without any sort of explanation.
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