Chapter 9 The preliminaries are updated ahead of time, and the chapter at noon tomorrow is busy
Chapter 9 Preliminary Round (update the chapter tomorrow at noon in advance, I have something to do)
Since Gong Rihui gave two extra questions on the first day, this has become a must-have question for Xu Chuan every night.
Others have two questions, and he has four. This can be regarded as additional practice. After all, he has never participated in arithmetic competitions before, and has done relatively few Olympiad questions and arithmetic competition questions. I will give him some time to make up for it while I still have time.
As time went by, the more questions Xu Chuan took, the more Gong Rihui became happy and a little depressed.
Fortunately, Xu Chuan's mathematical ability far exceeded his previous expectations. According to the current situation, there is no problem in joining the provincial team, entering the winter camp or even joining the training team.
What’s depressing is that such a good seedling wasn’t discovered before?
The days passed by, and soon it was time for the National High School Physics League Preliminary Competition and the National Mathematics League Preliminary Competition.
Participating in the National High School Mathematics and Physics League is a prerequisite for participating in IMO and IPHO. It is divided into preliminaries, preliminary rounds and leagues.
At the top of the list is Wu Jing. Its exam was in early September. At that time, Xu Chuan was still participating in mathematics training. He took a day to go there and got first place in the province with full marks, and also qualified to enter the league.
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This didn't create much of a stir in No. 1 Middle School. At most, I was praised a few times by my classmates for my rainbow fart.
After all, he had already won the IPHO silver medal in July this year. For him, the provincial preliminary round was a matter of success in everyone's eyes.
At 7:50, the test papers were handed out and the invigilator announced the test rules as usual.
"Before getting on the bus, everyone should double-check whether they have brought their student IDs and participation certificates. After getting on the bus, hand in all the mobile phones and IDs you have with you."
After this round of exams, students with the top first prizes in each province, city, and autonomous region can participate in the Mathematics Olympiad (CMO) and go to P University to participate in the winter camp. They are almost a select few.
More than 30 teammates from No. 1 Middle School were scattered in various examination rooms. Xu Chuan was not in the same room as his classmates. He was fighting alone in a classroom with students from other schools.
The fill-in-the-blank questions are quite satisfactory and come in various types.
Xu Chuan sighed, then picked up a black pen and wrote his name and admission ticket number.
However, the students who can participate in the preliminary round of the league are all the top students selected by each school, which can be said to be the cream of the crop.
Xu Chuan looked around the classroom. The students who came to participate in the preliminary round of the league were very different in age. In this classroom, he even saw a child who was less than 1.4 meters tall. He was wearing a loose school uniform. His age was probably ten years old.
He looks like three or four years old.
I just don’t know if this is to experience life or if I have real strength.
After more than half a month of training, Xu Chuan has almost mastered and revived high school mathematics knowledge. The provincial competition is not his goal, nor is the league, but the final IMO and IPHO.
At eight o'clock sharp, the exam officially started.
The other is a proof question. A triangular pyramid is drawn in a sphere, and then you are asked to prove that the center of gravity of the two is at the same coordinate position.
After successfully arriving at the High School Affiliated to the Normal University, the group went to have breakfast together in the canteen of the High School Affiliated to the Normal University. Xu Chuan didn't eat much for breakfast, just two steamed buns and a cup of soy milk. Others even ate less than him, and some even didn't.
Eat, use chocolate, energy bars and other things to supplement sugar.
For No. 1 Middle School, which also belongs to Star City, they do not need to come early like students from other cities. They only need to arrive at the examination room before 7:30.
However, with the league reform in recent years, the preliminaries have been canceled and are not required to be held, so now it is directly the preliminary round, which is the so-called provincial competition, also called the semi-finals.
After all, the provincial competition is in line with the Mathematical Olympiad Winter Camp and the International Mathematical Olympiad, which expands knowledge; it appropriately adds some mathematics curriculum standards, that is, the content of elective textbooks.
At six o'clock in the morning, in front of the No. 1 teaching building, a bus stopped on the playground. The teacher Gong Rihui who led the team held up a loudspeaker to remind the students participating in the competition over and over again.
After the preliminary round of the physical competition, the preliminary round of the numerical competition followed.
Here, except for admission tickets and student ID cards, other things are not allowed to be brought into the classroom.
At 7:30, the entrance examination was completed, and the candidates were in their places, ready to launch. Oh, no, they were preparing to start the exam.
The exam consists of four answer questions, each worth 50 points, with a total score of 200 points. It includes one question each from plane geometry, algebra, number theory, and combinatorics.
The examination questions are 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, worth 7 points each; and there are 3 answer questions, worth 14 points, 15 points, and 15 points respectively.
"The teacher prefers geometry in this paper."
After all, the exam is coming soon, and eating too much will affect the blood supply to the brain.
After driving for half an hour, the bus successfully arrived at the High School Affiliated to the Normal School, one of the four most prestigious schools, where this year's Provincial High School Mathematics League will be held.
After getting the test paper, Xu Chuan did not write directly or write his name. Instead, he read the entire test paper first.
However, it seemed that this was the first time for the child to participate in this kind of competition. He looked a little excited and looked around.
Just like this year, the total number of people participating in the preliminary league matches across the country is close to 50,000, and of these 50,000, only more than 100 can enter the winter camp to participate in CMO.
The preliminaries and preliminary rounds of the math competition are the same as the physical competition. They are organized by each province. The preliminaries are held in schools, and the difficulty is almost at the college entrance examination level on average. The preliminary round is organized by each province itself, and students who have passed the preliminaries participate.
Xu Chuan, who has participated in sports competitions, is very familiar with this process. After getting on the bus and registering his name, he put his ID and mobile phone into the transparent admission ticket bag prepared by the assistant teacher.
This is the rule in Shonan. There are pens, pencils, rulers, compasses and other things used for answering questions on the table in the examination room.
The first and second tests of the National High School Mathematics League Preliminary Competition are held on the same morning. The time for the first test is from 8:00 to 9:20 a.m., a total of 80 minutes.
That's right, there are no multiple-choice questions in the preliminary round of the league. If you are not strong enough, it is normal to go back with an 'egg' in this exam.
Of course, the number of places for the provincial first prize varies from province to province. Provinces such as Hunan, Hubei, and Zhijiang, which are major competition provinces, will definitely have more places. This is normal.
Compared with the preliminaries, the provincial competition is more difficult and is divided into first and second trials, but the first and second trials are held at the same time.
The second examination time is from 9:40 to 12:10 in the morning, a total of 150 minutes.
After all, the ultimate goal of selecting students to participate in CMO is to participate in IMO, so naturally they must choose from stronger candidates.
As for solving questions, two of the three solving questions are about geometry, and one is about finding the area. The shape is a circle with a bunch of straight lines drawn randomly inside, and then you are asked to find the area of a fingernail-sized triangle formed by the intersection of the straight lines.
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Check to make sure it is correct and then start doing the questions.
This test paper is not difficult for him. There is no proof process required for filling in the blanks. He can just do the math once and write down the results directly.
In fact, in mathematics multiple-choice questions and fill-in-the-blank questions, if you don’t know a question, there is a high probability that you can use the numbers -2, -1, 0, 1, 2, 1/2, and 1/3 to solve the problem.
Come up with the correct answer.
As for the reason, you have to ask the math teacher who gave the test.
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