CHAPTER XXIII

During the statutory seven-day National Day holiday, the senior high school students of Haicheng No. 1 Middle School only had three days.

But there are more bitter beings than them.

The more than 100 students who signed up for the competition only had a holiday on October 1.

In anticipation of the upcoming National High School Math League, they spend the remaining two days in school making up for classes.

This also means that Gu Lu, as a competition tutor, also only has one day off on National Day.

This made Gu Lu feel a deep malice on the part of the school.

If it weren't for the school paying him another salary as a competition tutor, Gu Lu would have planned to quit directly.

On October 1st, Gu Lu stayed at home comfortably salted fish for a day.

The next day, Gu Lu had to get up early in the morning and rush to school.

In the huge campus, it seems very deserted, and the doorman is still lying on the bench with a thermos cup, listening to the opera coming out of the radio.

In the staircase classroom of the teaching building, students came one after another.

But everyone, with a listless expression.

Originally, there were very few three-day holidays, and two days were forcibly taken up by competition coaching, so it's no wonder that this can be happy.

By the time Gu Lu came to the classroom, the students had almost arrived.

It is worth mentioning that more than 180 students who originally signed up for the competition have been unable to bear this pressure for more than half a month, or have recognized the reality and chose to quit halfway.

So far, there are less than 150 people left.

But this has little impact on Gu Lu.

The group of students who chose to quit were all cannon fodder players, and an early exit was not a bad thing for them.

Abandon those unrealistic ideas and focus all your energy on preparing for the college entrance examination, which is the right way for those people.

And none of the more than ten seeded players that Gu Lu is optimistic about have withdrawn so far.

In the most recent test, those more than a dozen people also performed well.

…………

"Today we are going to talk about Fermat's theorem. Gu Lu stood on the podium, his voice excited, "They all raised their heads to look at me." Fermat's minor theorem has been a high-frequency test center in the second test in recent years. ”

"When the time comes, if you don't even know this, don't say that I taught you when you go out. ”

"Teacher, who do we say teach?" asked a student in the audience.

Gu Lu: "Let's just say that Teacher Gao taught me." ”

Gao Yunjin, standing on the side of the podium: "???"

I'll go on. Gu Lu coughed lightly and said, "Fermat's theorem is a very basic theorem in number theory. Specifically, if a is an integer and p is a prime number, then a^p-a is a multiple of p, which can be expressed as, a^p≡a (mod p). If a is not a multiple of p, this theorem can also be written as a^(p-1)≡1(mod p). ”

"The specific proof method is ...... like this"

Fermat's minor theorem, as a special case of Euler's theorem, is at the bottom of the difficulty level in number theory.

Gu Lu is also very handy when he speaks.

But the students in the audience were not so easy to understand.

Although Gu Lu has tried his best to speak clearly and concisely, there are still many students who are in a state of semi-confusion.

For this group of students, Gu Lu was also helpless.

There is a threshold for competitions, especially math competitions, and the mechanism of big waves and sand makes it impossible for competition teachers, like school teachers, to wait for those students who run slowly.

If you run slowly, you can only be slapped on the beach by the waves.

If you don't want to become cannon fodder, catching up is the only choice.

Ma Zhengxuan is such a person.

The knowledge that Gu Lu talked about on the podium, although he couldn't fully understand it in class.

But he would write down all the content of Gu Lu's lecture word for word in his notes, and after class, he would take any free time to review.

As for Biqi......

Completely different from Ma Zhengxuan, he didn't need to take any notes in class at all.

As long as the content of Gu Lu's speech, Bi Qi can fully comprehend it after listening to it once.

The notes are completely superfluous for him.

No way, the talent is good, you can do whatever you want!

On the podium, Gu Lu used a whole blackboard to finish the two conventional proof methods of Fermat's minor theorem.

Gu Lu pointed to the blackboard, "The proof methods of the two Fermat theorems I wrote will not be tested, you just need to understand it." ”

Poof——!

Many students in the audience almost spurted out a mouthful of old blood.

How many brain cells do we die to understand the formula of this blackboard.

But you can tell us directly......

No!

I won't test you to spend so much time talking about yarn!!

Originally, it was hard to take a vacation and be called to make up for the class, but the mentality was bad enough, and then you came to this one, Mr. Gu, and the mentality completely collapsed!

Gu Lu couldn't hear the wails of the classmates in the audience.

He wrote a question on the blackboard: "Calculate the remainder of 2^100 divided by 13?"

"Do a simple exercise, which student can come up and try this problem. Of course, with the knowledge of Fermat's minor theorem that I just mentioned. ”

Swish!

As soon as Gu Lu's words fell, a hand below was quickly raised.

Bi Qi raised his right hand and looked at Gu Lu expectantly, as if to say, "Teacher, turn over my brand!"

Of course, Gu Lu knew what Bi Qi was thinking when he came up to answer the question.

With Bi Qi's character, he will not give up if he does not take this opportunity to gain a large wave of shock points.

Gu Lu was not in a hurry to flop, and looked down calmly with his arms crossed.

Slowly, several pairs of hands were raised one after another.

"Well, then Biqi...... The girl in the back. ”

Bi Qi, who had already stood up and was about to walk up to the podium, sat down stupidly, and then looked at Gu Lu's gaze with a resentful little look.

Gu Lu pretended not to see it, and his gaze fell back on the blackboard.

…………

Midday.

Lunch Gu Lu was solved directly in the school cafeteria.

It was still the aunt with intermittent Parkinson's syndrome who was cooking, but this time Gu Lu was witty and didn't order meat dishes.

I'm such a clever little ghost.

But what caught Gu Lu off guard was what kind of creature the cafeteria aunt was, it didn't matter if Gu Lu didn't order meat dishes, aren't the eggs in the scrambled eggs with tomatoes also considered meat dishes?

Shake it off, shake it all off!

In the end, Gu Lu looked at a plate full of scrambled eggs with tomatoes without leaving half an egg, and wanted to cry without tears.

Gu Lu realized that he was afraid that he would meet his lifelong enemy!

Gu Lu was eating with a black face, and suddenly saw Bi Qi pulling Ma Zhengxuan to Gu Lu's table with the food.

Take a look at the plate.

The meat and vegetables on the plate of the two were unusually rich, and there was no sign of a shortage of catties or two.

Gu Lu's hand holding the chopsticks suddenly exerted force.

"Teacher, this is the book "500 Questions for Logical Thinking Training", Ma Zhixuan and I have done it all. Bi Qi put a book in front of Gu Lu.

"What are the answers you made?"

"Here!"

The two of them each took out a notebook and handed it to Gu Lu.

………………

PS: Ask for collections, ask for recommendations!!