Because the scores of the test are not evenly distributed, at least in the national examination.

Among them, math problems are the most important. Practice more if you can increase the number of operations as much as possible. Many math problems are just too evasive. You can save a lot of time by mastering all kinds of problem-solving skills.

Don't give up the exam first, do it in order. If not, or think it takes too much time to do it, then give up. Many may be the most basic problems, and it is a pity to ignore them all.

At the last moment

I hope it will help you when you do the problem yourself.