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alpha_plus_gamma
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x | y | z | --------------- 4 | 1 |-5| m e | 7 | n | 10 f | 10 Mar 2008, 00:58
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+ | x | y | z |
---------------
4 | 1 |-5| m
e | 7 | n | 10
f | 2 |-4 | 5

What is the value of m+n?

Is it like this?

-5 + 1 + m = 4 so m = 8
f = 2 -4 + 5 = 3

****since f = 3 , e = 2?****

then n = -15

so m+n = 7 ?



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GMAT TIGER
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x | y | z | --------------- 4 | 1 |-5| m e | 7 | n | 10 f | 10 Mar 2008, 01:09
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alpha_plus_gamma
+ | x | y | z |
---------------
4 | 1 |-5| m
e | 7 | n | 10
f | 2 |-4 | 5

What is the value of m+n?

Is it like this?

-5 + 1 + m = 4 so m = 8
f = 2 -4 + 5 = 3

****since f = 3 , e = 2?****

then n = -15

so m+n = 7 ?
Show more



m = z + 4
n = y + e
m + n = z + 4 + y + e

lets rearrange:
m + n = (z + e) + (4 + y)
m + n = 10 + (-5) because (z+e) should be equal to 10 and (4+y) = -5.
therefore, (m + n) = 5

i guess i also did it many times. :P :P :P
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alpha_plus_gamma
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x | y | z | --------------- 4 | 1 |-5| m e | 7 | n | 10 f | 10 Mar 2008, 01:25
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GMAT TIGER
alpha_plus_gamma
+ | x | y | z |
---------------
4 | 1 |-5| m
e | 7 | n | 10
f | 2 |-4 | 5

What is the value of m+n?

Is it like this?

-5 + 1 + m = 4 so m = 8
f = 2 -4 + 5 = 3

****since f = 3 , e = 2?****

then n = -15

so m+n = 7 ?



m = z + 4
n = y + e
m + n = z + 4 + y + e

lets rearrange:
m + n = (z + e) + (4 + y)
m + n = 10 + (-5) because (z+e) should be equal to 10 and (4+y) = -5.
therefore, (m + n) = 5

i guess i also did it many times. :P :P :P
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Thanks. I went dumb when i saw this problem. :lol:
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prasannar
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x | y | z | --------------- 4 | 1 |-5| m e | 7 | n | 10 f | 10 Mar 2008, 02:58
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GMATTIGER,

Could you explain this please,

I am lost :(
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x | y | z | --------------- 4 | 1 |-5| m e | 7 | n | 10 f | 10 Mar 2008, 22:48
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alpha_plus_gamma
+ | x | y | z |
---------------
4 | 1 |-5| m
e | 7 | n | 10
f | 2 |-4 | 5

What is the value of m+n?
Show more

the positive sign, +, in the upper left tells that every entry in the box equal to sum of the corresponding element in the top row and first column.

so m = corresponding element in the top row (i.e. z) + corresponding element in the first column (i.e. 4) = z + 4
similarly n = y + e
so, m+n = y + e + z + 4
m+n = y + e + z + 4
lets try what value fits if we combine any two of the right hand side of the equation.

e + z = 10
y + 4 = -5

so lets sum them.
m+n = 10-5 = 5

did i make it clear?

prasannar
GMATTIGER,

Could you explain this please,

I am lost :(
Show more
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prasannar
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x | y | z | --------------- 4 | 1 |-5| m e | 7 | n | 10 f | 11 Mar 2008, 02:06
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Thank you, I understood :)



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!