From BrainTrainAge.com:

Brain Train Age is a simple, fun and effective PC game for you to make mental exercise. Brain train age also can test your brain age. It gives you a clearly age of your brain. Brain Train Age features activities designed to help stimulate your brain, like solving a series of simple, rapid-fire math equations as fast as possible, counting interesting icons and many other easy but interesting and helpful games. Brain Train Age features multiple games to practise your brain abilities, including analytic ability, sixth sense, calculating ability, illation ability, and memory. Three levels for the player make the game suitable for everyone. No matter you are a young player, a mother or a grandfather, having two grandsons already, Brain Train Age will help you to have a sharp and agile mind