Generally speaking, I think it is better to cooperate with the college entrance examination and the competition to do the questions. The competition has a wide range of questions and flexible solutions, which is helpful to broaden the thinking of solving problems and train the thinking of solving problems. Observation ability is necessary, and you can practice when you do the questions: read the questions, guess what they will be, pay more attention to some sensitive words, and gradually accumulate experience, so that you can read one question after another without asking more questions than expected.
One more thing to pay attention to when doing math problems is memory. This kind of memory is a good solution and a good way of thinking. After all, the problem is endless, so the training of thinking comes out.
Are there any games to exercise the brain and so on? Generally, when you are sleepy, you play when you are relaxed, with fun as the main purpose.