What is m+n ??

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What is m+n ??

by shalzz9 » Fri May 07, 2010 1:04 am
Please check the image for the question

A - 3
B - 4
C - 5
D - 6
E - 7

OA C

This problem was a little hard to search in the search engine as it contains a table. If some has a link to this solution please provide the link or solution

Thanks
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by sanju09 » Fri May 07, 2010 3:20 am
shalzz9 wrote:Please check the image for the question

A - 3
B - 4
C - 5
D - 6
E - 7

OA C

This problem was a little hard to search in the search engine as it contains a table. If some has a link to this solution please provide the link or solution

Thanks
Image
Well, following is the necessary info drawn from the table:

x + 4 = 1 or x = -3

y + 4 = -5 or y = -9

z + 4 = m

x + e = 7 or e = 10

y + e = n or n = 1

z + e = 10 or z = 0, hence m = 4

m + n = [spoiler]4 + 1 = 5

C
[/spoiler]
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by vcb » Sat May 15, 2010 8:34 am
here's how I went about it.. Noted all the equations possible:

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

Isolated the eqns which have m or n -
4+z=m
e+y=n

Adding both -
4+z+e+y = m+n, our requirement.

one eqn from the above set states
e+z=10

So,
4+10+y = m+n

Isolating the eqn which has a single y,
4+y=-5
y = -9

Substituting,
4+10+(-9) = m+n = 5 Hence C.

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by orel » Sat May 15, 2010 12:09 pm
what is the question here?

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by gmatmachoman » Sat May 15, 2010 12:15 pm
sanju09 wrote:
shalzz9 wrote:Please check the image for the question

A - 3
B - 4
C - 5
D - 6
E - 7

OA C

This problem was a little hard to search in the search engine as it contains a table. If some has a link to this solution please provide the link or solution

Thanks
Image
Well, following is the necessary info drawn from the table:

x + 4 = 1 or x = -3

y + 4 = -5 or y = -9

z + 4 = m

x + e = 7 or e = 10

y + e = n or n = 1

z + e = 10 or z = 0, hence m = 4

m + n = [spoiler]4 + 1 = 5

C
[/spoiler]
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