Great Country Academician

Since Gong Rihui asked two extra questions on the first day, these questions became Xu Chuan's must-have question every night.

Others do two, he does four, this can be considered extra practice, after all, he has never participated in the math competition before, and he has done relatively few Olympiad questions and math competition questions, so he can make up for him while he still has time.

As time went by, the more questions Xu Chuan did, the more relieved Gong Rihui became, and a little depressed.

The good news is that Xu Chuan's mathematical ability far exceeds his previous estimation. According to the current situation, it is not a problem to enter the provincial team, enter the winter camp or even enter the training team.

What is depressing is how come such a good seedling has not been discovered before?

Days passed by, and soon, the time for the National High School Physics League Preliminary Competition and Mathematics League Preliminary Competition came.

Participating in the National High School Mathematics and Physics League is a prerequisite for participating in IMO and IPHO, which is divided into preliminaries, preliminary rounds and leagues.

At the top of the list is Wujing. Its exam was in early September. At that time, Xu Chuan was still participating in mathematics training. He took a day to get the first place in the province with a perfect score, and also got the qualification to enter the league. .

This didn't cause much trouble in the No. 1 Middle School, at most, the classmates praised the rainbow fart a few words.

After all, he had already won the IPHO gold medal in July this year. For him, the preliminaries in the province seemed to be easy for everyone.

After the preliminary competition of physical competition, the preliminary competition of mathematics competition followed.

The preliminaries of the mathematics competition, like the preliminary competitions and the physical competition, are held by the provinces themselves. The preliminaries are held in schools. The average level of difficulty is almost at the level of the college entrance examination.

It's just that the league has been reformed in recent years, and the preliminaries have been cancelled, and it is not required to be held, so now it is directly the preliminary round, which is the so-called provincial round, also called the rematch.

Compared with the preliminaries, the provincial competition is more difficult, and it is divided into the first test and the second test, but the first and second tests are held at the same time.

After all, the provincial competition is in line with the Mathematical Olympiad Winter Camp and the International Mathematical Olympiad, and has expanded in terms of knowledge; in addition to appropriate mathematics curriculum standards, that is, the content of elective textbooks.

After more than half a month of training, Xu Chuan has almost learned and recovered his high school mathematics knowledge. The provincial competition is not his goal, nor is the league. The final IMO and IPHO are.

"Before getting on the bus, everyone checks whether you have your student ID card and competition card. After getting on the bus, you have to hand in your mobile phone and ID card with you."

At 6 o'clock in the morning, in front of the No. 1 teaching building, a bus stopped on the playground, and the teacher Gong Rihui who led the team held up a horn to remind the students participating in the competition over and over again.

Xu Chuan, who has participated in the physical competition, is very familiar with this set of procedures. After getting on the bus and registering his name, he put his ID and mobile phone in the transparent test admission ticket bag prepared by the assistant teacher.

After driving for half an hour, the bus arrived at the High School Affiliated to the Normal University, one of the four famous schools, where this year's Provincial High School Math League will be held.

For No. 1 Middle School, which also belongs to Star City, they don't need to come early like students from other cities, they just need to arrive at the examination room before 7:30.

The first test and the second test of the National High School Mathematical League Preliminary Competition are on the same morning, and the time for the first test is 8:00 to 9:20 in the morning, a total of 80 minutes.

The examination paper consists of fill-in-the-blank questions and answer-answer questions, with a full score of 100. There are 8 fill-in-the-blank questions, worth 7 points each; 3 answer questions, worth 14, 15, and 15 points respectively.

The time for the second test is from 9:40 am to 12:10 am, a total of 150 minutes.

The test questions are four answer questions, each question is 50 points, and the full score is 200 points. Including plane geometry, algebra, number theory, and combinatorics.

That's right, there are no multiple-choice questions in the preliminary competition of the league. If you are not strong enough, it is normal to eat an 'egg' on this test and go back.

However, the students who can come to participate in the preliminary competition of the league are all the top students selected by each school, which can be said to be one in a hundred.

After this round of examinations, the top-ranked students in the provinces, municipalities, and autonomous regions can participate in the Mathematical Olympiad (CMO), and they can go to P University to participate in the winter camp, which is almost one in a thousand.

Just like this year, the total number of people who participated in the league preliminary competition across the country was close to 50,000, and among these 50,000 people, only more than 100 people could enter the winter camp to participate in the CMO.

Of course, the number of places for the provincial first prize varies from province to province, and there must be more places in big competition provinces like Shonan, Hubei Province, and Zhijiang, which is normal.

After all, the ultimate goal of selecting students to participate in the CMO is to participate in the IMO, so it is natural to choose from stronger candidates.

After successfully arriving at the high school attached to the division, the group went to the canteen of the high school to have breakfast together. Xu Chuan didn't eat much for breakfast, but ate two steamed buns and a cup of soy milk. Others even ate less than him, and some even ate less Eat, fill up on sugar with things like chocolate, energy bars, etc.

After all, the exam is coming soon, and eating too much will affect the blood supply to the brain.

At 7:30, the entrance examination is completed, and the candidates are all in their positions, ready to launch. Oh, no, it is ready to start the exam.

Here, except for the admission ticket and student ID card, other things are not allowed to be brought into the classroom.

This is Shonan's rule. There are pens, pencils, rulers, compasses and other things for doing the questions on the desks in the examination room.

More than 30 teammates from the No. 1 Middle School were scattered in various examination rooms. Xu Chuan did not share a room with his alumni. He fought with students from other schools in a classroom by himself.

Xu Chuan looked around the classroom. The ages of the students who came to participate in the preliminary competition of the league were very different. In this classroom, he even saw a child who was less than 1.4 meters in size, wearing a loose school uniform, and his visual age may be ten or ten. The appearance of three or four years old.

I just don’t know if this is to experience life, or if it’s real strength

However, the kid seemed to be participating in this kind of competition for the first time, and he looked a little excited, looking around.

At 7:50, the test papers were issued, and the invigilator routinely announced the test rules.

At eight o'clock, the exam officially began.

After getting the test paper, Xu Chuan did not directly write or write his name, but read the whole test paper first.

The fill-in-the-blank questions are quite satisfactory, and there are various types.

But answering questions, two of the three answering questions are geometry, and one is to find the area. The figure is a circle with a bunch of straight lines drawn in a mess, and then you are asked to find the area of ​​a triangle the size of a fingernail formed by the intersection of the straight lines .

The other is a proof question. A triangular cone is drawn in a sphere, and then you are asked to prove that the centers of gravity of the two are at the same coordinate position.

"The teacher of this paper prefers geometry."

Xu Chuan sighed, then picked up a black signature pen and wrote down his name and admission ticket number.

After checking to make sure it is correct, start doing the questions.

This test paper is not difficult for him. There is no need to prove the process of filling in the blanks, just write down the result after calculating it.

In fact, in the multiple-choice questions and fill-in-the-blank questions in mathematics, if you don’t know a question, you can use the numbers -2, -1, 0, 1, 2, 1/2, 1/3 to set, there is a high probability that you can Come up with the correct answer.

As for the reason, you have to ask the math teacher who gave the paper.

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