Brain School is an IQ tester aimed at a younger audience but with five levels of increasing difficulty the action soon advances out of the school gates and becomes a challenge for all adults. There are the expected simple numbers tests, shapes, word puzzles, and spatial awareness teasers.
You begin on the very easiest level which should be OK for most. The first activity is following a coin that is covered by a top hat (the old follow the coin trick), but you do have to get five out of five to progress to the next stage. Each time you finish a level you get a report card and only A+ will suffice. Then move through the stages like advancing years at school and try to pass your exams. If you don't you can just start again! It's a good cerebral workout but it takes a while to get going.