Help me solve this math problem

[JSD]

I couldn't figure this out and it's bugging me.

Sent from my iPhone

[Quetzalcoatl]

That IQ test is garbage.  Everyone I know got like 160+ on it.  I totally guessed on that one though and I have no idea what the answer is.  In order to see the right score you have to share your results on Facebook so I didn't bother to check what the answer was.

[sunnyd656]

Yeah that IQ test is garbage to say the least.... but this question and 2 others did really stump me. Have 0 idea.

[KGs Knee]

The answer is -5 I believe.

Add the two digits of the bottom box and subtract the answer from the top box in the column. The answer is the middle box.

Example....

1+2=3, 9-3=6
2+1=3, 38-3=35
2+3=5, 47-5=42
2+7=9, 4-9=-5

[pokeKingCurtis]

The answer is -5 I believe.

Add the two digits of the bottom box and subtract the answer from the top box in the column. The answer is the middle box.

Example....

1+2=3, 9-3=6
2+1=3, 38-3=35
2+3=5, 47-5=42
2+7=9, 4-9=-5

I knew it had something to do with math and numbers.

[Global Celtic]

The answer is -5 I believe.

Add the two digits of the bottom box and subtract the answer from the top box in the column. The answer is the middle box.

Example....

1+2=3, 9-3=6
2+1=3, 38-3=35
2+3=5, 47-5=42
2+7=9, 4-9=-5

Cool.

[mgent]

I also came up with -5.

[sunnyd656]

The answer is -5 I believe.

Add the two digits of the bottom box and subtract the answer from the top box in the column. The answer is the middle box.

Example....

1+2=3, 9-3=6
2+1=3, 38-3=35
2+3=5, 47-5=42
2+7=9, 4-9=-5

Nice work. I thought it had something to do with the corner numbers both going into the #3. 4x3=12 9x3=27. and couldn't get anywhere from there lol.