GMATPrep - addition table shown above

jsl wrote:OA C

Is there a quick way to do this question? Obviously, you could work through the additions but I'm sure there must be a trick - can someone spot it?

well - let me try:


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

So since we have matrix, I think I can re-arrange this:

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

m + n = - 5 + 10

m + n = 5 :!:

logitech wrote:

jsl wrote:OA C

Is there a quick way to do this question? Obviously, you could work through the additions but I'm sure there must be a trick - can someone spot it?

well - let me try:


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

So since we have matrix, I think I can re-arrange this:

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

m + n = - 5 + 10

m + n = 5 :!:

Wow thanks! I guess I should just write out what I see!

logitech wrote:

jsl wrote:OA C

Is there a quick way to do this question? Obviously, you could work through the additions but I'm sure there must be a trick - can someone spot it?

well - let me try:


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

So since we have matrix, I think I can re-arrange this:

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

m + n = - 5 + 10

m + n = 5 :!:

Hi Logitech,

Could you explain this:

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

m + n = - 5 + 10

I don't see where the -5 and 10 are coming from.

dmateer25 wrote:

logitech wrote:

jsl wrote:OA C

Is there a quick way to do this question? Obviously, you could work through the additions but I'm sure there must be a trick - can someone spot it?

well - let me try:


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

So since we have matrix, I think I can re-arrange this:

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

m + n = - 5 + 10

m + n = 5 :!:

Hi Logitech,

Could you explain this:

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

m + n = - 5 + 10

I don't see where the -5 and 10 are coming from.

See the attached picture.

Request someone to please explain this question.

Regards.

hi Mankey,

this is how i understand the first response to the post -

from the table:

m = 4 + z
n = e + y

therefore m + n = (4 + z) + (e + y)

since the operation is addition, re-arranging the terms will not affect the sum.

so, you can re-arrange the terms as shown below to allow you to substitute the terms with the corresponding figures from the matrix

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

from the table 4 + y = -5
from the table z + e = 10

therefore

m + n = -5 + 10
m + n = 5

hope that helps..