Chapter 23

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

But there are people who are even more miserable than them.

The more than 100 students who signed up to participate in the competition will only have the holiday on October 1st.

In order to prepare for the upcoming National High School Mathematics League, they have to stay in school to make up for the remaining two days.

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

This made Gu Lu feel the school's deep malice.

If the school hadn't paid him an extra salary as a competition tutor, Gu Lu would have just given up the job.

On October 1st, Gu Lu stayed at home and spent the whole day comfortably.

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

The huge campus seemed very deserted. Mr. Mengang was still lying on the bench holding a thermos cup, listening to the opera on the radio.

In the lecture hall of the teaching building, students arrived one after another.

But everyone has a listless expression.

Originally, three days of vacation were very few, and two days were taken up by the competition tutoring. It was strange that I could still be happy.

By the time Gu Lu came to the classroom, the students were almost there.

It is worth mentioning that among the more than 180 students who originally signed up to participate in the competition, after more than half a month, some people continued to be unable to bear the pressure, or recognized the reality and chose to drop out midway.

As of now, there are less than 150 people left.

But this had little impact on Gu Lu.

The group of students who chose to withdraw are all cannon fodder players, and it is not a bad thing for them to withdraw early.

Abandoning those unrealistic ideas and focusing all your energy on preparing for the college entrance examination is the right way for those people.

As for the dozen or so seed players that Gu Lu is optimistic about, none of them have withdrawn so far.

In the latest test, those ten people also performed well.

…………

"Today we are going to talk about Fermat's Little Theorem." Gu Lu stood on the podium with an excited voice. "Everyone raised their heads to look at me. Fermat's Little Theorem has been a frequently tested topic in the second exam in recent years."

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

"Teacher, who taught us this?" some students in the audience asked.

Gu Lu: "Just say it was taught by Teacher Gao."

Gao Yunjin, standing beside the podium: "???"

"I'll continue." Gu Lu coughed slightly and said, "Fermat's little theorem is a very basic theorem in number theory. The specific content is: if a is an integer and p is a prime number, then a^p-a is p

A multiple of 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 this..."

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

Gu Lu was also very good at speaking.

But it was not so easy for the students in the audience to understand.

Although Gu Lu tried his best to speak clearly and concisely, many students were still in a semi-confused state.

Gu Lu had nothing to do with this group of students.

There are thresholds for competitions, especially mathematics competitions. The mechanism of the big waves makes it impossible for competition teachers, like school teachers, to wait for those students who run slowly.

If you run slowly, you will only be hit by the waves on the beach.

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

Ma Zhengxuan is such a person.

Although he could not fully understand the knowledge that Gu Lu taught on the podium in class.

But he would write down everything Gu Lu said word for word in his notes, and take any free time to review after class.

As for Bi Qi...

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

As long as Bi Qi listened to what Gu Lu said, he could fully understand it.

Notes are so awesome, they are completely superfluous to him.

There is no way, you have good talent, you can do whatever you want!

On the podium, Gu Lu used a whole blackboard to explain the two conventional proof methods of Fermat's Little Theorem.

Gu Lu pointed at the blackboard, "I won't test the two proof methods of Fermat's Little Theorem that I wrote. You just need to understand them."

puff--!

Many students in the audience almost spit out blood.

How many brain cells did we lose before we could understand this blackboard full of formulas?

But tell us directly...

No! Yes! Take the test!

I won’t ask you to spend so much time talking about something!!

My mentality was already bad enough when I was called to make up lessons after a long vacation. But when Teacher Gu came here again, my mentality was completely shattered!

Gu Luke couldn't hear the wailing of the students in the audience.

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

"Let's do a simple exercise. Can any student come up and try this question? Of course, you must use the knowledge of Fermat's Little Theorem that I just mentioned."

Whoosh!

As soon as Gu Lu finished speaking, a hand quickly rose from below.

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

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

With Bi Qi's character, he won't give up until he takes advantage of this opportunity to gain a lot of shock value.

Gu Lu was not in a hurry to turn over the cards, he folded his arms and looked down calmly.

Slowly, several hands were raised one after another.

"Well, let's go to Biqi...the girl at the back."

Student Bi Qi, who had already stood up and was about to walk onto the podium, sat down angrily, and then looked at Gu Lu's eyes with resentful eyes.

Gu Lu pretended not to notice and looked back at the blackboard.

…………

noon.

Gu Lu had lunch directly in the school cafeteria.

The cook was still the aunt suffering from intermittent Parkinson's syndrome, but this time Gu Lu was smart enough not to order meat or vegetables.

I'm such a clever little guy.

But what caught Gu Lu off guard was what kind of creature was the cafeteria aunt? It didn't matter that Gu Lu didn't order any 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 might have met his lifelong enemy!

Gu Lu was eating with a dark face when he suddenly saw Bi Qi pulling Ma Zhengxuan to Gu Lu's table with the dishes.

Take a look at the dinner plate.

The two people's plates were extremely rich in meat and vegetables, and there was no sign of any shortage.

Gu Lu's hand holding the chopsticks suddenly tightened.

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

"What's your answer?"

"Here!"

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

………………
Chapter completed!