I am a math major in NMET 147. I don't think it is difficult to do more math problems. Never feel that you have done a lot of problems, it depends on your own situation. For example, I think my foundation is very good. Then I'll do the innovative problem. You don't have to do the 22nd question from the 1 question of each set of papers (hehe, I'm from Henan, and our question is 22). You can choose to do it. When you see a new problem, you must understand it thoroughly! Do a question and you will know a question type! ! ! This is very important! ! Good luck!