i seen it 2 weeks ago. they had another mathmatic problem that they had to answer in 10 seconds of looking at and they all got it wrong. i think it was like 9 out of the 10 people got it wrong.
it was
4 + 4 - 4 + 4 x 4 and they all answered 12 when its actually 32
but looking at it and having to answer it in 10 seconda or less it get you