Look at the spinning woman and if she is turning left your right side of your brain is working. If she is turning right your left side of your brain is working.
If she turns both ways for you then you have a 160 or better IQ .
Click on the image to see her spin.
I don't belive in the "IQ over 160" part. However, it's an interesting trick. She initially spins to the left for me, but I can turn her to go to the right too. I've done "Right brain vs Left brain" tests online and the score keeps coming up as close to 50/50. Sometimes the left has a few % more and sometimes it's the right who comes up with a few % more. I think that has more to do with it than my IQ.