Sharp Brain Training calculator

Basically, you aren’t really using your brain to the fullest in terms of “processing power” when it comes to a calculator, but Sharp has other ideas with their Brain Training calculator. This device that goes by the model number Sharp EL-T100W looks like a regular calculator albeit it will feature embedded mental arithmetic drills and quizzes to check out your brain age, where results are dependent on the complexity of the puzzle alongside the amount of time required to solve whatever it throws you. Is that worth 13.49 Euros?