Wuzhou High School has one large and three elementary schools, which are one large Wuzhou No. 9 Middle School. Some older generations have always called Wuzhou No. 9 Middle School Wuzhou Middle School. Directly represented by the local middle school, it can be seen that it is strong.

The three primary schools are the Attached Middle School, the Experimental Middle School, and the No. 1 Middle School.

At this moment, in the lecture hall of Wuzhou High School, bursts of enthusiastic applause spread throughout the middle school.

"Hmph. A disdainful sneer came from the right, and Yang Fan turned his gaze, it was a student with a peaked cap, with short hair, and his face was hidden in the shadows.

However, the secret hum just now still let Yang Fan know that this is a girl.

A pair of bright eyes suddenly looked back, and the delicate face was hidden in the shadow of the hat, and the light flickered and flickered.

Yang Fan was about to take a closer look, but the girl burst into a foul mouth: "What, boy, you have thoughts about me." ”

"Hehe, just a little curious. Yang Fan pinched the bridge of his nose to hide his embarrassment. This classmate is also a wonderful person.

The girl glanced at Yang Fan up and down, returned her gaze to Feng Yao, and said softly: "It seems that you are also going to be brainwashed by Feng Yao." ”

It's good that this woman doesn't speak, but she really makes people feel very ignorant when she speaks. In the classroom, he even wore a peaked cap and secretly hid in the back row, there must be a secret.

"I think Teacher Feng is not bad, don't talk nonsense. Yang Fan said.

"You know. Don't blame me for not reminding you that he is the kind of person who is a pioneer who has dedicated his life to the cause of education, he just wants to make the base of top students in mathematics larger, so that he can choose some better talents to be students. ”

Yang Fan was about to refute, and Feng Yao wrote again on the stage.

There were a total of four blackboards up and down, and before the students had time to record them, Feng Yao wiped them one by one, and said, "I have also drunk the poisonous chicken soup, now let's talk about business." I said before the start of the course that I was looking for a few students to participate in the Olympiad for professional training, and there are more than 100 of them here, and I don't have so much time. So, be picky. ”

He wrote 12345679 on the blackboard and said, "This number, whatever you want to solve, it will take twenty minutes." ”

In the audience, the students took out paper and pencil and calculated the calculations. Isn't this number the same as the 142857 just now, and there are some rules?

Under the multiplication test, there is no result, and the division seems to be a completely random number. Addition and subtraction don't seem to work satisfactorily either.

Yang Fan put down his pen and had a headache, as if he hadn't figured out the key.

"Do you want me to tell you, you beg me. The woman next to her seemed to have known the answer, and raised her head haughtily, waiting for praise from others.

"Don't communicate, don't talk. The answer is not the only one, as long as you can find some reasonable rules, or a wonderful way of writing, you can get my approval. I'm looking at your aura, not answers. ”

Feng Yao found that some students were secretly answering the answers, which was really a mess. It's just a number, not a question, so there's no standard answer.

Through the light, Yang Fan found that there seemed to be several repeated numbers on the white paper in front of the girl. He was slightly stunned, and a flash of inspiration flashed in his mind.

Think for a moment and write down on a piece of paper:

12345679×9=111111111

12345679×18=222222222

12345679×27=333333333

......

How did I think of such a complex calculation method, as if I had never been exposed to it? There are quirks.

Yang Fan recalled whether he had read a similar question in a book recently, rummaged through his memory, and did not get an answer. So, some of Gauss's memories that day affected his brain? Yang Fan was a little uncertain.

"When the time comes, I'll come down, you show the answer, I'll take a look. ”

Feng Yao walked through the aisles, most of the students' answers were just swept across, and there were a few that were pleasing to the eye, and he would ask him to stand up first.

Yang Fan sat in the last few rows, seeing that he still had a long time to reach him, and looked down at the numbers, would there be any other way. Your own solution is not necessarily the most interesting, and there may be omissions.

Yes, Yang Fan continued:

12345679×243=2999999997。

12345679×108=1333333332

12345679×117=1444444443

......

"Alas, boy, I said that the time is up, why are you still in a hurry, do you think that the aura can be obtained by taking time? ”

Before Yang Fan finished writing, a piece of paper was accepted by Feng Yao, he glanced at it, and his face suddenly changed greatly: "Young man, how many classes are you, why haven't you seen it before." ”

"The third class of high school. ”

Feng Yao looked at the answer for a while, looked at Yang Fan for a while, and frowned, "Young man, your name?"

All the students in the class looked at this change. In the previous question, it seems that Feng Yao didn't even ask the name. What amazing answer did this classmate write that made Mr. Feng value it so much.

"Yang Fan of the third and third classes. ”

"Young man, how did you come up with the second set of numbers?" Feng Yao said again.

"It felt similar to the first group, so I wrote it. Yang Fan replied honestly.

Feng Yao nodded self-righteously, and said: "Young man, you are all in the third year of high school, how did you do in mathematics before, I have never heard of your name." ”

Under the eager eyes of the other party, Yang Fan was a little embarrassed and said, "The science grades are average." Liberal arts are even worse. ”

"Sure enough, the exam-oriented education has taught all the good seedlings to waste, you stand first, and I'll talk to you when it's over. ”

Feng Yao nodded happily at Yang Fan and continued to look at the other students' answers.

When he walked past the girl next to him, he didn't even look at the answer, and just crossed over. It's a small detail that no one notices.

As soon as he stood, he showed a difference.

Now standing on the ground, there are three people in all. One is Ye Haoran, a science genius in Yang Fan's classmate, who everyone knows.

The other is more famous in the third year of high school, the overlord Cui Qiming. In the next exam, the first place in the grade, the second place, at least 20 points. The more difficult the question, the greater the score. The second grade still everyone takes turns to sit, only the first, and there is no change, which is really extremely perverted.

The people who were sitting were naturally eliminated, and they were muttering below, and the one who talked about the most was naturally Yang Fan. Who is he? How have I never heard of him?

Feng Yao then singled out two more people, a man and a girl, Yang Fan felt very faced, and learned from other people's discussions that the girl was a sophomore in high school, and the other boy was a freshman in high school. In this way, there were only five people standing.

Feng Yao walked back to the podium, his expression was a little happy, and said, "This year, I was lucky, and there were five people who passed the test. Students who participated last year may remember that I didn't want any of them at that time. So, this year is a good year. ”

"Teacher Feng, your choice is too casual, we are not convinced. ”

"That's it, Mr. Feng, there is still a senior year, and the first year of high school has only been in class for a month, how can I participate in the Olympiad. ”

"Even if you are in the third year of high school, you don't necessarily have to be a top student, and Teacher Feng is too messy. ”

......

When it comes to the third year of high school, it is actually self-evident who everyone is targeting. There are two of them who are academic masters, and the other is called Yang Fan, which is pure luck.

Feng Yao's eyes were cold, and he said: "You waste materials, you can't blame others for your good performance, the school is what teaches you." Well, since you are not convinced, I will tell you why.

12345679-1=12345678

12345679-2=12345677

......

Look, what a spark of genius, the soul is jumping. Which mentally retarded person came up with this, and he can use subtraction, which is amazing. High school students have broken the ground with subtraction. There are other profound laws, and I won't name them one by one, and I can't teach this kind of genius. ”

"And what did the five of them write?"

"You said it yourself, let us think whatever we want, there is no fixed answer. ”

"Yes, I said that there is no fixed answer, so I pick people according to the mood, what do you do with me. But if you say that, you will definitely be even more unconvinced.

12345679×9=111111111

12345679×18=222222222

......

Here, there is a fixed name, called kiss one color. Isn't it dumbfounded. ”

"Teacher Feng, the time you gave is too short, I can think of it immediately. ”

If not misled by you, this answer is also commonplace. ”

"Teacher, my math score is no worse than that of five people standing, why can't I?"

Feng Yao was slightly angry, only waste materials thought that they could be recognized by words, and geniuses could only do but not speak.

His face darkened, and he continued in an unchanged tone: "It can be said that here four students have stood out. And the other, Yang Fan, was even more amazed by me, and he gave two answers. Another answer:

12345679×243=2999999997。

12345679×108=1333333332

......

Isn't it normal to look at the usual, to tell you, the number of this answer is added up before and after, and it is a kind of kiss in disguise. The aura and sparkle in it, I can safely say, once in a hundred years. ”

As soon as this answer came out, the stage and the audience were instantly quiet, no matter who it was, they would never have thought that there would be such a strange answer. This law, how did his head come up with it.

Is this what Mr. Feng said about the understanding of mathematics?