Great Country Academician

In less than half an hour, Xu Chuan had already finished all the questions, but it was still too early to hand in the papers. Although the papers could be handed in earlier, there was a regulation in the competition in southern Shonan Province, and the papers should be handed in at most half an hour earlier.

Having nothing to do, Xu Chuan checked the test paper first, and after confirming that there were no problems, he looked around at the status of other people.

On the right, a pretty lady with delicate features is writing a book, and I don’t know what she has done, but her excellent eyesight tells him that this lady is not answering the questions, but sketching on the draft paper. It was still a kun.

The kid on the left that he noticed before was less than 1.4 meters tall, and he was staring at the test paper with a pen in his mouth at the moment, with a loveless expression on his face.

Well, it seems that this kid is here to experience whether the food in the high school attached to the teacher is delicious, and I don't know which school he sent it to.

In addition, there was a big brother in front who nodded his head, on average once every two seconds, and then he was shocked for half a minute, shaking his head violently, forcing himself to be clear, and the cycle repeated.

As for the back, Xu Chuan didn't know. After all, if he turned his head and looked behind, there was a possibility that he would be regarded as cheating by the invigilator.

After staying up for more than half an hour, the time for early submission of papers finally came. Xu Chuan decisively stuffed his student ID card and admission ticket into his pocket, handed in the papers and left the venue early.

As for other people who are still struggling in the examination room, it has nothing to do with him.

And from a certain point of view, he allows candidates who have not finished answering the questions to have a more relaxed test environment in advance, which will help them improve their scores.

When they came to the designated rest area, not only their teacher Gong Rihui, but also some students who also handed in the papers in advance, were waiting outside.

"Brother Chuan, here."

Lu Tianrui with a small round face saw Xu Chuan with sharp eyes, and waved his hands excitedly.

"Take a break, drink some water, and prepare for the second test."

Gong Rihui smiled and handed over a bottle of water, without even asking how the exam was going.

The first test is a small kiss for Xingcheng No. 1 Middle School. More than half of the more than 30 students can get full marks. After all, the difficulty is only a little stronger than the college entrance examination.

The second test is where the strong ones are really screened.

The break time in the middle is not long, even for students who hand in their papers in advance, it only takes more than half an hour, and those who wait until the end to hand in their papers, at most ten minutes to drink water and go to the toilet to meet their personal physiological needs.

Compared with the first test, the second test is much more difficult.

Although it only has four questions, it involves four aspects of plane geometry, algebra, number theory, and combinatorics.

Compared with the 80 minutes of the first test, which was less than an hour and a half, the test time of the second test was extended to 150 minutes, or two and a half hours, which was nearly half the time.

From the extended time, we can know that the difficulty has increased by more than a little bit.

Four questions, four test papers, one for each question.

Four questions, two and a half hours of exam time, an average of a little more than half an hour for one question.

As an old habit, after getting the test paper, Xu Chuan still browsed through all the questions first.

Fermat points are tested in plane geometry, intersection operations are tested in algebra, functions are tested in number theory, and combinatorial identities are tested in combinatorics.

Judging from the topic, according to Xu Chuan's personal judgment, the difficulty is much higher than the previous test.

This can be seen from the children and young ladies on the left and right.

In the first test, the two of them could still solve a few questions, but when they got the test papers in the second test, they were immediately dumbfounded.

Let alone done it, I couldn't understand the questions of the second test.

"In this exam, I'm afraid that most of the students will have to break the sand, and I don't know how many of them can get full marks."

After reading the questions, Xu Chuan shook his head. In the past half a month of training time, he has finished the CMO competition questions of the past ten years and the first test competition questions.

In terms of difficulty, this year's first test has been ranked in the top three or even number one in the past ten years. This year's second test is not only difficult overall, but also has a super finale question.

The finale is the last question, one to prove the combinatorial identity, and to solve this combinatorial identity, at least nine combinatorial identities are needed to prove it. Not only did Yang Hui's triangle and Wei Da's three special types of equation expansions be tested, but also mixed with probability In theory, the level of complexity is so high that it simply shouldn't appear in a preliminary competition like the second test.

In the competition, probability is still a relatively unpopular knowledge point, which is completely different from the popular knowledge point of geometry. Geometry is available every year, and probability may not be encountered once in a few years.

The proof of this combinatorial identity, even if it is included in the national competition, is very difficult, the finale kind

The experts who came up with the question this time are really ruthless. Aside from this combination identity, at the level of No. 1 middle school, there should be a dozen of more than 30 students who can get full marks in the exam, but with this identity, let alone ten Well, aside from him, it would be a pretty good score for anyone else to get a full score.

Shaking his head, Xu Chuan filled in his name and admission ticket number, and then started to do the questions.

He was still familiar with handing in the papers ahead of time, but this time, when he returned to the rest point, only teacher Gong Rihui, who led the team, was waiting here alone.

"How was the exam?" Gong Rihui asked with a smile as he handed Xu Chuan a bottle of water.

"The questions this time are much more difficult than those in previous years. I took the test of combinatorial identities, with probability theory mixed in, and the difficulty is not low. I am afraid that the number of people who get full marks will be much smaller." Xu Chuan took the water and unscrewed the bottle cap and drank it. With a sip, he said lightly.

"Are you sure?"

Hearing this, Gong Rihui restrained the smile on his face and asked.

During the more than half a month of training, he saw the mathematical skills and talent of the student in front of him, which made people surprised and suspicious of life.

Sometimes when discussing certain issues, when Xu Chuan put forward some ideas and opinions, he even felt like he was communicating with his peers, no, he was communicating with his lecturers in college.

If he is not sure about getting full marks, then I am afraid that the Star City No. 1 Middle School will be wiped out this time.

In addition, the difficulty of the questions can be seen from the number of students who hand in the papers in advance. Generally speaking, the more people who hand in the papers in advance, the easier the questions will be.

Students who can participate in the competition, even if they don't know how to do it, many of them have to wait until the end of the exam. After all, who might suddenly get inspiration in the last half hour?

Of course, those kinds of questions are incomprehensible, and there are students who come to experience the atmosphere every year.

No, there are a few students around who handed in the papers ahead of time like Xu Chuan, and wrote the word "jie" all the way, complaining that the questions were too difficult.

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