For some math competitions that take a lot of brains, the draft paper is the cleanest at first, and the mind is the clearest. Generally, you will do the calculation first, then the application, geometry, travel, and finally the number. Draft papers must be written separately one by one, not necessarily according to the above. Just do what you think is simple first. Different people think that simple topics are different, and this cannot be said. If you have time to look up the questions, you'd better use a completely different method to avoid falling into the trap again. Be sure to carefully examine the questions, and think about what you should examine and whether there are any traps. Don't panic when you do difficult problems. You should know that you can't learn from others and don't stick to difficult problems, otherwise you will lose confidence if you don't have time to do it in the future. For some problems that you think there is a simple method but can't figure out, use the simplest method to get them out. I really can't do some questions, so I have to give an answer. Don't leave the short answer blank, but fill the whole question with the process. It is impossible for the marking teacher to look so carefully and give points when he sees a data pair, whether or not he does that. If the topic is controversial, it is better to write it out. For example, the topic says "natural numbers" If the natural number includes 0, the answer is … excluding 0, and the answer is … that's it. Wish progress!