This test measures your brain's ability to mentally rotate objects.

Two boxes will appear on the screen, each filled with red and green squares. If you could rotate one of the panels would it be identical to the other or would it be different?

Click Match or Mismatch to indicate your answer. If you get it correct, the next problem will be more difficult. If you get it wrong, the next problem will be easier.

Solve as many problems as you can in 90 seconds.