If it is summer, it does not mean that thinking is not necessary. Play some puzzle games, you only need to write the correct number of digits. Choose the right number in the table of classes and categories. To do this just click on each digit. The number that you want to write - Specified on top of the table. You will see that he is able to do it and easily find any number. A little patience and a little more thought! Prepare your light head!