Chapter 10 Second Test
In less than half an hour, Xu Chuan had solved all the questions, but it was still too early to hand in the paper. Although he could hand in the paper in advance, the competition in Shonan Province had regulations, and the paper should be handed in half an hour in advance at most.
With nothing to do, Xu Chuan checked the test paper first. After confirming that there were no problems, he looked around at the status of other people.
A pretty young lady on the right was writing furiously. He didn’t know where she was, but her excellent eyesight told him that this young lady was not answering questions, but sketching and drawing on the draft paper. It's still a Kun.
The kid on the left who was less than 1.4 meters tall that he noticed before was currently staring at the test paper with a pen in his mouth and a look of despair on his face.
Well, it seems that this kid is here to experience how delicious the food at the Normal High School is, and I don’t know which school sent it to him.
In addition, there was a big brother in front who nodded his head bit by bit, once every two seconds on average, and then got shocked in the next half minute, shook his head violently, forced himself to be clear, and the cycle continued.
As for the back, Xu Chuan didn't know. After all, if he turned around and looked at the back, he might be considered cheating by the invigilator.
After staying up for more than half an hour, it was finally time to hand in the paper in advance. Xu Chuan decisively stuffed his student ID card and admission ticket into his pocket, handed in the paper in advance and left.
As for other people who are still struggling in the examination room, it has nothing to do with him.
And from a certain perspective, he provides a more relaxed exam environment for candidates who have not yet finished answering the questions in advance, which helps them improve their scores.
When they arrived at the designated rest area, waiting outside were not only their leading teacher Gong Rihui, but also some students who had also submitted their papers in advance.
"Brother Chuan, here."
The round-faced Lu Tianrui saw Xu Chuan with sharp eyes and waved his hands excitedly.
"Take a rest, drink some water, and prepare for the second try."
Gong Rihui smiled and handed over a bottle of water without even asking how the exam went.
The first test is a little kiss for Star City No. 1 Middle School. More than half of the more than thirty students got full marks. After all, the difficulty is only slightly higher than the college entrance examination.
The second test is where the strong ones are truly selected.
The rest time is not long, even for students who hand in papers in advance, it only lasts for more than half an hour, while those who wait until the end to hand in papers can only take ten minutes at most to drink water and go to the toilet to satisfy 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: plane geometry, algebra, number theory, and combinatorial mathematics. The level of difficulty has also increased from slightly more difficult than the college entrance examination to a real competition level.
Compared with the 80 minutes for the first test and less than one and a half hours for the second test, the test time for the second test was extended to 150 minutes, which is two and a half hours, which is nearly half the time.
You can tell from the extended time that the difficulty has increased more than a little bit.
Four questions, four test papers, one for each.
Four questions, two and a half hours of exam time, an average of a little more than half an hour per question.
As usual, after getting the test paper, Xu Chuan still browsed through all the questions.
Plane geometry tests Fermat points, algebra tests intersection operations, number theory tests functions, and combinatorial mathematics tests combinatorial identities.
Judging from the questions, 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 were able to solve a few questions, but when they got the test paper in the second test, they were immediately stunned.
Not to mention I did it, I couldn’t even understand the questions in the second test.
"I'm afraid most of the students will be disappointed in this exam, and I don't know how many will get full marks."
After reading the questions, Xu Chuan shook his head. In the past half a month of training, he had finished all the CMO competition questions in the past ten years and the competition questions in the preliminary examination.
In terms of difficulty, this year's first test has been ranked in the top three or even first in the past ten years. This year's second test is not only more difficult overall, but also has a super finale question.
The finale is the last question, which is to prove a combinatorial identity. At least nine combinatorial identities are required to solve this combinatorial identity proof. It not only tests Yang Hui's triangle and Veda's three special types of equation expansions, but also mixes in probability. In theory, the level of complexity is so high that it should not appear in a preliminary competition like the second trial.
In the competition, probability theory is a relatively unpopular knowledge point. It is completely different from the popular knowledge point like geometry. Geometry exists every year, but probability may not be encountered once every few years.
The proof of this combinatorial identity is very difficult even if it is put into the national finals, and it is the finale
The expert who set the question this time is really ruthless. Putting aside the combinatorial identity, at the level of No. 1 Middle School, about ten of the more than thirty students should be able to get full marks, but with this identity added, not to mention ten Okay, apart from him, if anyone else can get full marks, it would be a very good result.
Shaking his head, Xu Chuan filled in his name and admission ticket number, and then started to do the questions.
It was still the familiar routine of handing in papers in advance, but this time, when he returned to the rest point, only the teacher Gong Rihui, who was leading the team, was waiting here.
"How was your exam?" Gong Rihui asked with a smile and handed Xu Chuan a bottle of water.
"The questions this time are much more difficult than those in previous years. It tested on combinatorial identities, with probability theory mixed in. The difficulty is not low. I'm afraid the number of people who will get full marks will be much less." Xu Chuan took the water and unscrewed the bottle cap and drank. One mouthful and he said calmly.
"Are you sure?"
Hearing this, Gong Rihui asked, suppressing the smile on his face.
After more than half a month of intensive training, he saw the mathematical skills and talents of the student in front of him, which was simply surprising and doubtful.
Sometimes when discussing certain issues, when Xu Chuan puts forward some ideas and opinions, he even feels like he is communicating with his peers, no, he feels like he was communicating with his lecturers in college.
If he is not sure of getting full marks, then Star City No. 1 Middle School may be completely wiped out this time.
In addition, the difficulty of the question can be seen from the number of students who submitted the paper in advance. Generally speaking, the more people who submit the paper in advance, the easier the question will be.
Many students who can participate in the competition, even if they don't know how to do it, have to wait until the end of the exam. After all, who may suddenly have inspiration in the last half hour?
Of course, students who can’t even understand the questions come to experience the atmosphere every year.
No, there were a few students around me who, like Xu Chuan, handed in their papers in advance, and complained all the way that the questions were too difficult, so they wrote the word "solution".
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(End of chapter)