The source to Japan "the number alone small game", at present lets the English whole nation for it crazily, because the rule is simple, the actually countless changes, definitely does not need to use the mathematical computation in deliberating, only must utilize the logical inference ability, therefore regardless of in whole families blue men and women, everybody all may play. Moreover is easy to obtain, to be easy to be fascinated, as soon as plays becomes addicted. The number alone not only interesting is amusing, but also may promote the playing inference and the logical function, therefore may exercise the mental ability as the student the teaching material oh!