Xueba: The knowledge I teach, critical hits are returned

This day was Saturday.

Gu Bai scanned a shared yellow bike at the school gate as usual and rode towards the home of Li Sisi, a primary school student.

Although Gu Bai now had more than 10,000 yuan in cash, it was enough for the tuition for the next semester, and even enough for living expenses if he saved a little.

But...No matter how small a mosquito is, it is still meat.

Lu Yuan did not give up his 200 yuan per week tutoring job.

These days, Gu Bai did not continue to write papers for others, but stayed in the library honestly.

If you ask him why he goes to the library......

Of course, it was to solve the mathematical problem Zhou's conjecture.

But unfortunately, even with the drawings provided by the system, Gu Bai always felt that something was missing. He could not really solve it by his own ability without the drawings.

As for where the problem was, Gu Bai was not sure. Perhaps...All that's missing is a hint of inspiration, or an opportunity?

Soon.

Gu Bai arrived at the residential area where Li Sisi lived.

After parking the shared bicycle, Gu Bai paid 2 yuan and immediately stepped into the not-so-luxurious but very luxurious residential area.

He knocked on the door of Li Sisi's house, and it was still Li Sisi's mother who opened the door. When she saw that it was Gu Bai, a hint of joy appeared on Liu Ping's face:"Teacher Xiaobai is here?" During this period, her daughter Li Sisi's math grades have improved by leaps and bounds, and even Li Sisi's teacher called directly to praise the child.

This made Liu Ping very happy. This was also the first time she received a praise call from her child's teacher.

She knew the reason for the child's improvement in grades, so she was much more polite to Gu Bai.

""Yeah." Gu Bai smiled and nodded in response

"Li Sisi, Teacher Xiaobai is here."Prepare slippers for Gu Bai and Liu Pingping shouted loudly towards Li Sisi's bedroom.

"Teacher Xiaobai, you are here." Li Sisi obviously did not just get up, as could be seen from her carefully tied ponytail.

"Teacher Xiaobai, do you know how many points I got in this math test?" Li Sisi, with her hands behind her back, stood half a meter away from Gu Bai, looking up at Gu Bai who was changing his shoes with a mysterious look on her face.

"How many points? 90?" Gu Bai asked curiously.

Li Sisi's original math grades were not good, but of course not bad either. She had always been in the middle of the class, otherwise she would not have been recruited by Gu Bai for training.

However, for his first training student, who also awakened the system here that day, Gu Bai was still quite concerned about Li Sisi's grades.

"100, I got a perfect score of 100!"

Li Sisi took out the test paper from behind, held it in front of Gu Bai, and said with a grin.

Seeing Gu Bai taking the test paper and looking at it, she continued to add:"And...I was the only one in our class who got full marks, and I got first place."

Li Sisi danced with joy, holding Gu Bai's arm and jumping up and down happily, with her two little ears shaking.

Gu Bai coughed, feeling a little embarrassed, thinking of words of praise in his mind.

Gu Bai really couldn't think of how to praise someone for getting full marks on the elementary school math test.

Now in his opinion, if it doesn't involve exams for college or above, or"world problem conjectures", it should not be praised.

Isn't it enough to have hands?

Fortunately, Gu Bai didn't need to think of any words of praise, because Li Sisi's mother Liu Ping was so excited.

"100 points!"

"Sisi, why didn’t you tell me?"

"Moreover, you got the first place in the class!!! Awesome, so awesome!"

"Great, great, Sisi, tell me what you want to eat for lunch today and I’ll make it for you."

Li Sisi didn’t seem to care much about what to eat. She said"anything is fine" and then followed Gu Bai to start this math tutoring. It was still the elementary school Olympiad test paper.

Li Sisi did it first, and Gu Bai explained the questions she didn’t know.

It has to be said that Li Sisi’s math score has improved a lot, at least it is no longer as simple as the 100 points in an ordinary elementary school test.

In an elementary school Olympiad test paper, there were only 2 questions that she didn’t know how to answer.

Glancing at the question, Gu Bai explained without even thinking,"This is a common engineering cooperation problem"

"From the question, we know that the work efficiency of A is 1/20, the work efficiency of B is 1/30, and the cooperation efficiency of A and B is 1/20*/5+1/30*9/10=7/100. Because the requirement is"the number of days for A and B to cooperate is as small as possible", we should let..."

"....In the end, the shortest time for A and B to cooperate is 10 days." After quickly writing down the answer, Gu Bai habitually turned the pen and asked,"Did you understand?"

Gu Bai's current teaching has comprehension +40%, memory +30%, and inference +40%. There is no need to worry about Li Sisi not understanding because he speaks too fast.

"I understand."Li Sisi nodded in sudden enlightenment and said:"...In fact, it is not just an engineering problem, some solution efficiency, the proportion of color balls is also similar"

""The young man is teachable." Gu Bai replied calmly.

His ability to draw inferences from one example was immediately demonstrated.

"Teacher Xiaobai, you are amazing!"

After sorting out the knowledge points in her mind, Li Sisi's eyes widened and flashed with light. She looked at Gu Bai with admiration and said,"Our math teacher has to think for more than ten minutes when encountering such a question....I solved it in seconds without even thinking about it."

As if feeling that being praised by a primary school student was not something to be proud of, Gu Bai changed the subject and asked curiously,"Which university did your math teacher graduate from?""

"Nankai."

???

Now, are even primary school teachers so stubborn?

"What's wrong? Is there any problem?"

"No, no problem, I just feel like your math teacher is from university...fine"

"Hehe, our Chinese teacher is better, she is from Yenching University."???"

Roll, crazy roll.

A top student from Yanda University actually teaches in elementary school!

""Okay, let's continue with the questions." Gu Bai didn't talk about these related things anymore. He was shocked.

He was an ordinary first-class university student. Would he be unable to survive in society now?

After talking about a few more questions, the phone in Gu Bai's pocket vibrated.

He got up and walked to the balcony leading directly to the bedroom. Gu Bai looked curiously and saw that it was Senior Wu Hai calling.

"Gu Bai, something bad has happened!"

As soon as the call was connected, Senior Wu Hai's somewhat panicked and low voice came.

Something has happened, what happened?

However, before Gu Bai could ask clearly, Senior Wu Hai hung up the phone, and then a text message came.

"Come quickly, classroom 201."

Looking at this message, Gu Bai's eyebrows jumped, and he had a bad feeling in his heart.