This application provides a simple and powerful memory numbers training function. The user memorizes a random series of numbers within a limited time. The longer the number, the more difficult it is. Users must be highly focused and focused on memory to pass the level. After training, users' memory and concentration will be significantly improved. This application is suitable for both young and old. It is not only suitable for young children to train their concentration and memory and to understand numbers, but also for middle-aged people to relax and relax.