Card solitaire is waiting for you in the new online game Zero 21. In order to decompose it, your knowledge will be useful to you in such a science as mathematics. Before you on the screen will be seen the playing field at the lower part of which will be a map of certain dignity. In the upper part of the field, piles of cards will appear. By clicking on them with the mouse, you can open the top cards and consider them. Your task is to follow certain rules to collect cards and thus clean the game field from them. As soon as you completely cleanse it in you in the game Zero 21, you will win the victory and you will go to the next level of the game.
