Take this year's national paper as an example, 80% of the big questions can make ordinary students start without any problems, and more than half of the students will be stumped by the first question. In the extremely limited examination time, candidates simply don't know which question to do to get points.
No matter how difficult junior high school mathematics is, more than 80% of them are divided into topics and fight for the last two questions. Most students have enough time to conquer it, and it is best to attack it. If they really can't do it, there are simple questions to guarantee.