Since Gong Rihui came up with two extra questions on the first day, this has become a must-have question for Xu Chuan every night.

After all, he has not participated in the math competition before, and he has done fewer Olympiad problems and math competition questions, so he will make up for it while he still has time.

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

Fortunately, Xu Chuan's mathematical ability far exceeded his previous estimates, and according to the current situation, there is no problem in entering the provincial team, entering the winter camp or even entering the training team.

It's depressing that such a good seedling hasn't been discovered before?

.......

Days passed, and soon, the time for the preliminary round of the National High School Physics League and the preliminary round of the Mathematics League to be held.

Participation 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 the competition, its exam is in early September, when Xu Chuan is still participating in mathematics training, and 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 make much waves in No. 1 Middle School, at most I was praised by my classmates for a few words.

After all, in July this year, he had already won the silver medal in IPHO, and the preliminary round in the province seemed to him to be a matter of hand.

After the preliminary round of physical competition, it was followed by the preliminary round of digital competition.

The preliminaries of the digital competition and the preliminary round are the same as the physical competition, which are held by the provinces themselves, and the preliminaries are conducted in the school, and the difficulty is almost at the level of the college entrance examination on average, while the preliminary round is organized by the provinces themselves, and the students who have passed the preliminaries participate.

It's just that in recent years, the league reform has canceled the preliminaries, and it is not required to be held, so now it is directly the preliminary round, which is the so-called provincial competition, also known as the semi-final.

Compared with the preliminary round, the provincial competition is more difficult, and it is divided into one and two trials, but the first and second trials 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 it has expanded its knowledge; In addition to the mathematics curriculum standards, the content of elective textbooks should be added appropriately.

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

.......

"Before getting on the bus, everyone checked again whether they had brought their student ID cards and participation certificates, and after getting on the bus, they had their mobile phones and documents handed in ......."

At six 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 a loudspeaker to remind the students participating in the competition over and over again.

Xu Chuan, who has participated in the competition, is very familiar with this process, and after registering his name in the car, he put his documents and mobile phone in the transparent admission ticket bag prepared by the assistant teacher for a long time.

After half an hour's drive, the bus successfully came to the High School Affiliated to the Division, one of the four famous schools, where this year's Provincial High School Mathematics League will be held.

For No. 1 Middle School, which also belongs to Star City, they don't need to come in advance like students from other cities, they just need to rush to the examination room before half past seven.

The first and second tests of the National High School Mathematics League are in the same morning, and the time of the first test is 8:00~9:20 in the morning, a total of 80 minutes.

The test paper is divided into two parts: fill-in-the-blank questions and answer questions, with a full score of 100 points. Among them, there are 8 fill-in-the-blank questions, each with 7 points; There are 3 answer questions, which are 14 points, 15 points, and 15 points.

The second test time is 9:40~12:10 in the morning, a total of 150 minutes.

The test question is four answer questions, each of which is worth 50 points, with a full score of 200 points. It includes plane geometry, algebra, number theory, and combinatorics.

That's right, there are no multiple-choice questions in the preliminary round of the league, and if you don't have enough strength, it's normal to eat an 'egg' on this exam and go back.

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

After this round of examinations, students with the top first prize in the competition areas of various provinces, municipalities and autonomous regions can participate in the Mathematics Olympiad (CMO) and 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 participating in the preliminary round of the league is close to 50,000, and of these 50,000, only more than 100 people can enter the winter camp to participate in the CMO.

Of course, the number of provincial first prizes varies from province to province, and the number of places in major competition provinces such as Xiangnan, Hubei and Zhijiang must be more, 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 the stronger ones.

.......

After successfully arriving at the middle school attached to the division, the group went to the canteen of the high school to have a breakfast, Xu Chuan didn't eat much for breakfast, he ate two buns and a cup of soy milk, and the others even ate less than him, and some didn't even eat it, using chocolate, energy bars and other things to supplement sugar.

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

At 7:30, the entrance test was completed, and the candidates were in place and ready to launch....... Oh no, it's preparing for the exam.

Here, except for the admission ticket and student ID, nothing else is allowed in the classroom.

This is the rule of Shonan, and there are all kinds of things on the table in the examination room, such as pens, pencils, rulers, and compasses.

More than 30 teammates from No. 1 Middle School were scattered in various examination rooms, and Xu Chuan did not share the room with the alumni, he fought alone in a classroom with students from other schools.

Xu Chuansi looked at the classroom, the age difference between the students who came to participate in the preliminary round of the league was very large, and in this classroom, he even saw a child less than one meter four, wearing a loose school uniform, and his age may be thirteen or fourteen years old.

I just don't know if this is to experience life, or if I really have the strength

However, it seemed that it was the first time for the children to participate in this kind of competition, and the whole person seemed a little excited, looking around.

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

At eight o'clock, the exam officially began.

After getting the test paper, Xu Chuan did not write directly or write his name, but first flipped through the entire test paper.

Fill-in-the-blank questions are decent, and there are various types.

Two of the three questions are geometry, one is to find the area, the figure is a circle, and a bunch of straight lines are 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 straight lines.

The other is a proof problem, where a triangular cone is drawn in a sphere and you are asked to prove that the center of gravity of both is at the same coordinate position.

"The teacher prefers geometry in this paper."

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

Check to make sure it's right and start working on the questions.

This test paper is not difficult for him, and the fill-in-the-blank questions do not need to prove the process, just write down the results directly.

In fact, in the multiple-choice and fill-in-the-blank questions in mathematics, if you don't know how to solve a problem, take the numbers -2, -1, 0, 1, 2, 1/2, and 1/3 to set, and there is a high probability that you can get the correct answer.

As for the reason, you'll have to ask the math teacher who produced the paper.

.......