In our time, it seems that counting is almost obsolete because we always have a calculator at hand. But solving simple math tasks is good for your brain and it can turn into an exciting game! Here you will have to fill a glass with balls. But there is a catch – each ball has a number on it and you have to put them in following a certain order. If you cope with the task well, you’ll get to another level where things will get even tougher!