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Simple Face Book quiz

See image.
can't post image, so here it is in text:

1 + 4 = 5
2 + 5 = 12
3 + 6 = 21
8 + 11 = ?


This is just a sanity check for me.
There were a few answers given. Most people said 40.

I said 96,
because
IF ( X + Y = Z ) <==what is shown ,
THEN ((( X * Y ) + X ) = Z )

To me this is the only one answer that will work with this, and in every case.

I see no reason to link any one equation to the answer from another that happens to be placed above it.
There are no logical operators there to suggest so.

Thank in advance.


this is really bugging me, so I hope someone here can decidedly clear this up for me.
thanks again.


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