No regrets ninety-two

Chapter 713 The Perverted Competition
Wu Xiaozheng finally saw the metamorphosis of the Mathematical Olympiad.

The test paper for the competition seems simple.

In the whole set of test papers, there are only 8 fill-in-the-blank questions and 3 short-answer questions in total. Among them, the fill-in-the-blank questions are worth 8 points each, the first short answer question is worth 16 points, and the remaining two questions are worth 20 points each, for a total of 120 points.

The amount of this question does not seem to be large.

The time to answer questions seems to be ample, from 8:9 am to 20:80 am, there are [-] minutes.

But the first question stumped Wu Xiaozheng.

Now arrange 7 students to participate in 5 sports events. It is required that students A and B cannot participate in the same event. Each event has someone to participate in, and each person only participates in one event. What are the different arrangements that meet the above requirements?

Wu Xiaozheng was stunned for a while when he saw the topic.

This is where Mathematical Olympiad is very logical.

Don't think this is just a fill-in-the-blank question.

But if you want to solve this problem, you must first consider that there are two possibilities for the competition plan, one is that one of the projects has three participants, and the other is that two of the projects have two participants, and then start to use professional knowledge to calculate each possible number of participants.

When calculating, it is necessary to exclude the situation that students A and B are participating at the same time.

Such fill-in-the-blank questions, if put in the college entrance examination, can be regarded as the most difficult short-answer questions.

And this is just the simplest fill-in-the-blank question, and the next one is more difficult than the next one.

Fortunately, Wu Xiaozheng has already mastered the mathematics knowledge of the second and third grades of high school, and basically understands the method of answering this question.

It took him a while to figure out the answer with 15000 possibilities.

Thankfully, no more zeros at last!
Wu Xiaozheng began to be patient and do the following questions.

In fact, it is basically impossible to score zero, because he has mastered all the knowledge points of high school mathematics.

However, this competition is only a preliminary competition that mainly assesses knowledge. Relatively speaking, most of the questions can be answered if you have a comprehensive grasp of mathematics knowledge in junior high school and strong logical thinking ability.

It's just more time-consuming.

But even so, there was still a fill-in-the-blank question and the last short-answer question that stumped Wu Xiaozheng.

And there is not enough time to answer the questions.

The main reason is that Wu Xiaozheng still did too little for similar questions.

After leaving the examination room, Wu Xiaozheng saw that the other three students in the class, including Liu Zhilan, were all crying. It seemed that they did not do well in the exam.

"Wake up, it's normal to not do well in the exam. For us who have just accepted the high school Mathematical Olympiad, this kind of competition is just soy sauce. Don't expect to get good grades!" Wu Xiaozheng comforted with a smile.

This age is not like the future.

In later generations, it will be tiring for children to go to school, and Mathematical Olympiad thinking will be cultivated directly from elementary school.

Even if the dolls are exhausted and complaining, parents are still happy to send their children to Olympiad interest classes at a high price.

Of course, that would be beneficial. At least the children at that time generally had a much better foundation in mathematics than current students. It was normal for them to get good grades in the Mathematical Olympiad competition in their first year of high school.

Liu Zhilan was still a little unwilling.

She asked, "How many points do you think you can get?"

"About eighty or ninety."

Wu Xiaozheng did better in the exam than he expected.

Except for the last short-answer question and a fill-in-the-blank question, he was quite sure about the others.

"Isn't it? I think it's pretty good if I get seventy points!"

Liu Zhilan couldn't believe it.

For her, mathematics has always been a subject she is proud of, and she has participated in training and competitions in the Olympiad in junior high school.

She originally thought that she would be just a little better than Wu Xiao in the Mathematical Olympiad competition, but who knew that she could not match this time, which made her very frustrated.

Wu Xiaozheng thought it was normal.

He knows why.

The reason why he did better than Zhong Xiaolan in the exam was that he had a more comprehensive knowledge of high school mathematics. Although Liu Zhilan had a foundation in Olympiad, it was limited to junior high school knowledge, and she had just started learning high school mathematics.

If she wants to get good grades, she will have to wait until next year at least, and that is when she spends a lot of time learning high school mathematics knowledge in advance.

Beyond that, a lot of practice is required.

"Do you know why I gave up this competition? Because the topic is too abnormal! It is said that the topic of the rematch is even more abnormal, and it will completely exceed the scope of high school mathematics knowledge."

Liu Zhilan understood what Wu Xiaozheng meant.

For an illusory ranking and honor, it is not necessary to spend a lot of time learning knowledge that is not very useful for future careers.

This gave her the idea of ​​quitting the Mathematics Olympiad study group.

In recent days, she has found the joy of learning computer knowledge, and has made great progress. Even Teacher Zhong praised her, saying that she only needs to work harder to enter the fast class.

It seems to have verified Wu Xiaozheng's guess.

Yan Zhanpeng came over, and after seeing the frustrated faces, he began to comfort everyone: "It's okay, this competition is for everyone to experience the difficulty of the competition and let everyone know what to learn next."

When he said that, everyone's depressed mood improved a lot.

Yan Zhanpeng turned his attention to the indifferent Wu Xiaozheng: "How did you do in the exam?"

"It's okay." Wu Xiaozheng replied perfunctorily.

But Yan Zhanpeng didn't want to let him go easily, and asked again: "How many points can I get?"

"About eighty or ninety percent." Wu Xiaozheng replied conservatively.

"So much?" Yan Zhanpeng asked in disbelief.

That's too much?
Wu Xiaozheng immediately felt that trouble was coming again.

You know, the [-] or [-] points he said are conservative.

He did the math himself, and except for one fill-in-the-blank question that he was not sure about, and the last short-answer question that he didn't finish and didn't get the correct answer, he was quite sure about everything else.

As for the last simple question, he has completed the main steps of answering the question, and it is conservatively estimated that it should be no problem to get half of the points.

In this way, it is very likely to get more than [-] points.

He immediately asked curiously: "What is the level of ninety points?"

Yan Zhanpeng replied: "According to the experience of previous competitions, if you can score more than [-] points in the city competition, you can basically enter the provincial competition. If you can score more than [-] points in the city competition, you can also get a place in the provincial competition."

Wu Xiaozheng: "..."

Trouble!
It seems that I still don't know enough about this competition, and I actually tried my best to answer the questions.

In this way, maybe there is really hope to enter the finals.

But is this what Wu Xiaozheng wants?

No!

He had read the outline of the contest.

In the preliminary competition of the provincial competition, the syllabus stipulates that all the knowledge points of the test are the content of high school mathematics, but in the semi-finals, the knowledge points of the test go far beyond high school mathematics, including the principle of drawers, the principle of tolerance and exclusion, the principle of extremes, Menelau Adams' theorem, Ptolemy's theorem and a series of concepts that he has never heard of.

If you go to participate in the semi-finals again, wouldn't you let yourself find abuse!

Wu Xiaozheng was sensitively aware that trouble might be coming again.

(End of this chapter)