In 2022, the national mathematics volume I of the college entrance examination was very difficult and was searched by candidates. In previous years, it was said that it was difficult to finish the math test in the college entrance examination, but now it is said that the difficulty is the greatest in history. Candidates in provincial key high schools cry after the math test, and the winners of the math competition even say that the college entrance examination questions are more difficult than the competition questions. Many schools have launched emergency measures to ask parents to do a good job of appeasing candidates. This is a rare event in the college entrance examination over the years. Some professionals estimate that the average score of mathematics in the college entrance examination this year may not exceed 40 points. 150, the average score is less than 40. The average score of normal test papers is often controlled near the passing line, and the scores of candidates are normally distributed. If the examinee's score deviates from the normal distribution seriously, the average score is extremely low or extremely high, which indicates that there is something wrong with the test paper. In other words, a normal test paper should be distinguishable.

Some people say that the college entrance examination is not a qualified exam, but a selection of talents. Only when the topic is difficult can you play. He also said that the difficulty of the topic is the same for everyone, and everyone is difficult. The lower the score, the lower the admission line, and the admission by ranking is not affected. These statements are specious. The college entrance examination is indeed a talent selection, not a qualification examination, but the college entrance examination is not just the selection of mathematics talents! The college entrance examination is a unified examination for all majors in colleges and universities across the country, not just the entrance examination for mathematics majors. Therefore, it is very important to grasp the degree of discrimination. Normal test papers should distinguish between poor students, medium students and excellent students. If it is too difficult, it is impossible to distinguish between difference and Excellence. If the difficulty is too great, the scores of poor students are the same as those of ordinary students, and even the upper-middle school candidates are the same as those of poor students, then the discrimination is also very poor.

The poor differentiation of mathematics is equivalent to the "ban" and abolition of this subject. The ranking of college entrance examination results is mainly based on the results of other subjects. This is decisive for candidates who are not too bad at math and relatively poor in other subjects.