The next day, Wednesday, in the classroom of the second class of the second grade of the sixth middle school.

Chen Yu leaned back in his chair, staring intently at the head teacher who was lecturing, and from time to time he wrote and drew on his notes.

"Buzz, buzz!"

Suddenly, the mobile phone in his pocket vibrate, and when he took out his mobile phone, he found that it was a short message from the "time-lapse salesman".

[Super Time and Space Promotion: "Mr. Chen, congratulations! Your real fans have exceeded 30,000. ”】

Chen Yu was stunned for a moment, and then typed quickly excitedly.

[Chen Yu: "Did you just break through? 30,000?"]

[Chrono Promotion: "Yes, congratulations. ”】

[Chen Yu: "It's only Wednesday today, can it break through 40,000 by next Monday?"]

[Chrono promotion: "The possibility is still very high, and the homepage recommendation effect of the Bilibili platform is great. It's a pity that all the news, reprints, and discussions about you on the Internet have been taken off the shelves, otherwise the increase in fans will be higher. ”】

[Chen Yu: "I am being blocked by the whole network?"]

[Chrono promotion: "Almost.] Since the reprints, news, posts and discussions of other platforms or media are not included in our company's legitimate interests, it is impossible to stop them. But it doesn't matter, when the trial period ends, your live streams and videos can be published on multiple platforms, and any external force will only get weaker and weaker to ban you. ”】

[Chen Yu: "Then it's hard for you."] ”】

[Chrono promotion: "It's not hard, our interests are the same, these are what I should do.] ”】

[Chen Yu: "I really touched the conscientious employees of the galaxy, has the product application for the fourth phase been completed?"]

[Chrono promotion: "I have started to go through the process, this is a very interesting product, you will definitely like it.] ”】

[Chen Yu: "As long as I can break through 50,000 fans and bring that girlfriend back."] (Withdrawn)"]

[Chen Yu: "As long as I can break through 50,000 fans, I like it.] ”】

[Chrono Promotion: "(Smile)"]

Exiting WeChat and taking back his mobile phone, Chen Yu sighed with satisfaction and confusion, picked up his notes, and continued to listen to the teacher's lecture.

Now, all the knowledge points he missed have been filled, and there will be no feeling of not being incomprehensible. And I vaguely noticed the teaching level of the head teacher, which seemed to be very low......

"Bell bell bell ......"

More than 20 minutes later, when the bell rang for the end of class, the head teacher put away the book for preparing for class, supported his hands on the podium, scanned the audience, and said, "Students, before class, I want to inform you of one thing. ”

"Hula. ”

A few male classmates who were just about to get up and rush out sat back.

"Next Saturday, our No. 6 Middle School will hold the Autumn Games. Regardless of whether they are athletes or not, every student must come and fight for the honor of the class and the school! Cheers! Many leaders of the education department and even the capital have come to this sports meeting, and everyone must maintain good discipline. Race out the style of our six middle school people!"

When the words fell, the head teacher was silent for a moment: "Why are you stunned?

"Bang Bang ......"

"Good, class!"

The class teacher waved his hand, and the students ran out of the classroom.

"Chen Yu, don't go, come over here. ”

When Chen Yu was also about to walk out of the classroom to breathe, the head teacher hooked his finger at him.

"What's the matter, teacher?"

"That's right, between the results of your monthly exam, Principal Pang is willing to gamble and lose, and at the same time decided that if you can get the first place in the school in the next monthly exam, you will never be forced to study physical education again. ”

"No. 1 in the whole school?" Chen Yu was stunned: "Isn't this span a bit big?"

"Anyway, this is the situation, the matter is such a thing, if you have any questions, just tell Principal Pang. ”

With that, the head teacher picked up the textbook and turned to leave.

"I must say it! Isn't it nonsense to be the first in the whole school!" Chen Yu followed behind the head teacher, walked out of the classroom indignantly, and was about to debate with Principal Pang.

"Don't look for it now, the principal went to dinner with the leader, and went with the dean. The head teacher turned his head and glanced at Chen Yudao.

"Really?"

"What are you lying about, you can go again in the afternoon. ”

At this moment, the teacher of the second class of the next math class came over and greeted Chen Yu and the class teacher: "Good morning." ”

Seeing the math teacher, Chen Yu's eyes lit up, and he hurriedly stepped forward: "Teacher, aren't you busy now? I still don't understand the finale question of the last monthly exam, can you tell me about it?"

Hearing this, the math teacher's eyes narrowed slightly.

The head teacher on the side also squinted his eyes.

The two looked at each other, nodded to each other imperceptibly, and completed a "spy-level" information exchange......

"Okay, no problem, you can't answer any questions, the teacher will give you now. The math teacher patted his chest generously.

"The final finale! I didn't understand the logic in it. ”

Chen Yu pulled the math teacher to the podium, then ran to his seat and found the math exam paper, and hurriedly ran back, put the exam paper in front of the teacher, and pointed to the last math problem: "That's it, I don't understand." ”

"Oh. The math teacher frowned and nodded, "That's the problem." ”

"Yes. How do you solve it? What is the idea?"

"This question ......" the math teacher carefully reviewed the problem and spread her hands: "I won't either." ”

“？”

"It's so hard, none of the teachers in the school know it. ”

"Why don't you want to come out?!" Chen Yu roared.

"It's because we can't that we're out. The math teacher scratched her head: "I wanted to see if there were any other student unions, and then I found out that the students wouldn't either." ”

Chen Yu: "......"

"Chen Yu, don't look at me like that. No one is perfect, and Einstein also had a problem of not being able to do it, right? You can't force a man to lock a man. ”

"You think you're quite reasonable?"

"I just won't, anyway. The mathematics teacher crossed his waist: "Why can the problem be solved? Isn't it impossible to solve the three major conjectures in the mathematics world?"

Chen Yu: "......"

"No, it won't. ”

“...... Yes. OK, OK, OK. Chen Yu took a deep breath, nodded, and pointed to the penultimate question: "What about this question? This question is also very difficult, I can't grasp the train of thought." ”

"That's a question. The math teacher looked at it for a while: "No." ”

"You're ......"

"It's so hard. It seems that the first student in our sixth middle school got it right. ”

"Students can get it right, but you can't?"

"Then some students can also dance the Pure Land of Bliss, why can't you?"

"What the hell is going on?!"

"I don't know that anyway. ”

"Okay, okay. Awesome. Chen Yu flipped through a page and pointed to a fill-in-the-blank question: "What about this?"

"No, it won't. ”

"This?"

"Nor will it. ”

"This ......"

"Oh, mom, no. ”

"......" Chen Yu was silent, and after a while: "How much is 1+1?"

The math teacher's eyes lit up, and he reached out and pulled out a piece of chalk and wrote the formula frantically on the blackboard!

[1. 0 is a natural number; 2. Every definite natural number a has a definite successor x', and x' is also a natural number; 3. If b and c are both successors of the natural number a, then b = c; 4. 0 is not a successor of any natural number; 5. Let S be a subset of the set of natural numbers, and (1) 0 belongs to S; (2) If n belongs to S, then n' also belongs to S. 】

【...... x is not in the range of f; f is a single shot, if x∈A and "a∈A implies f(a)∈A", then A=X......]

【...... N (set of natural numbers) is not an empty set; a one-to-one mapping of a→a' within N to N ......]

【...... If a subset of N P contains both elements that are not successors and successors that contain each element in the subset, then this subset is equal to N......]

[Proof of 1+1:

∵ the successor of 1+1 is the successor of 1, i.e. 3,

The successor to ∴2 is 3.

According to Piano's axiom (3), it can be obtained: 1+1=......]

Under Chen Yu's shocked gaze, the math teacher spent five minutes writing a blackboard formula, then hugged his shoulders and pondered for another minute, writing the numbers behind =.

[Available: 1+1=...... Thirteen thousand six hundred twenty-seven. 】

Chen Yu was dumbfounded.