In Yingyuan Private High School, where there are many beauties, Ning Qingyun is the most conspicuous and beautiful one. Although she only wears school uniforms all day long, her beauty and temperament cannot be concealed. I don’t know how many boys will secretly look at her and pass by the class window every day.

There are also many boys from other classes and even senior boys.

It's just that everyone knows Ning Qingyun's character, and no boy dares to talk to her easily.

Qin Ke was the thickest-skinned one. Anyway, he was Ning Qingyun's deskmate and had no idea about Ning Qingyun. He sat down carelessly and said: "Thank you, school committee member. Thanks to you, today's Chinese

I did very well on the exam."

"This is the result of your hard work." Ning Qingyun replied calmly, looking unhappy.

"Hey, who made our school committee unhappy? For the sake of borrowing my notebook, I'll help you teach him a lesson!" Qin Ke rolled up his sleeves deliberately.

"It's boring. You might as well study more when you have this time to talk nonsense. You can't have a proper smile all day long, and you won't let the teachers worry."

Ning Qingyun rolled her eyes at him, as if she wanted to ask something, but after looking at the eyes around her, she lowered her head to do the exercises and ignored Qin Ke.

Qin Ke glanced over and saw Ning Qingyun doing the last big question and three additional questions in mathematics in the afternoon. Ning Qingyun's memory was so good that he actually wrote down the four questions intact.

"Study committee, the exam is over, why are you still doing this question?" Qin Ke saw that there was a step specifically circled in the comprehensive question, and after thinking about it for a while, he understood: "Study committee, you are like this

Got a big question wrong?"

"Yeah." Ning Qingyun bit her red lips and nodded reluctantly, and couldn't help but add:

"In order to do the additional questions at the end, I was too hasty when I did the comprehensive question. I made a mistake here. I made a wrong step and made a wrong step. I only realized it after I handed in the paper. I guess 20 points will be deducted from the big question.

13 points. I did the first and second additional questions, but I'm not sure if I made any mistakes. I couldn't do the last additional question, so it was time to hand in the paper. The math test this time was really a bit difficult.

Difficulty."

"Let me help you take a look." Qin Ke has been a good person since he was a child and has already seen the implication of this school committee member's words. However, the girl is tender-skinned and a bit arrogant and reserved. He wants her to take the initiative to ask his male classmate who he is.

It was impossible, so he simply reached out and took the notebook on her desk.

"Hey, you..." Ning Qingyun wanted to hold it down, but Qin Ke moved quickly and had already taken the notebook away.

Seeing that Qin Ke was already looking at the answer process he had written, Ning Qingyun hesitated for a moment, with a faint blush on her face, and asked in a low voice in a voice that could only be heard by the two of them: "Did... did you do something wrong?"

"The first additional question is correct, and the second additional question is also correct. It's just that you chose the most troublesome conventional way to solve the problem and wasted a lot of time in answering the question. In fact, using the inclusion-exclusion principle is the fastest way. You see...

…”

Qin Keshun took the pen from Ning Qingyun's hand and started writing in her notebook.

"At this point, you can directly use the inclusion-exclusion principle to get the final result. It can be seen that there are 59 permutations of the meaning of the question."

Ning Qingyun looked at his neat handwriting and listened attentively. There was a hint of admiration in the beautiful Danfeng's eyes.

This guy's mathematical level is really better than mine! Why didn't I think of using the inclusion-exclusion principle?

"The third question is actually not difficult. You see, you can use two methods to prove it, one is mathematical induction, and the other is the introduction of complex numbers..." Qin Ke said as he wrote.

"Wait a minute, you've reached this point in your writing. I can't understand it. The first and second mathematical induction methods have such assumptions?" Ning Qingyun was fascinated. She subconsciously moved closer and pointed at a sentence written by Qin Ke.

Ask the steps.

"Oh, I used the two-parameter induction method in the last step. This is used less often. You may not have seen it. Simply put, it is to prove the proposition p(n,m) related to two independent positive integers.

)hour……"

Ning Qingyun nodded repeatedly when she heard this. She glanced around and noticed that Qin Ke's originally lazy and scornful face had become focused and serious, and his clear eyes revealed the light of wisdom. He couldn't help but think to himself, this guy

It’s not so annoying when you study hard...

This scene is completely different in the eyes of others.

Ning Qingyun was originally the object of attention. At this time, she and Qin Ke were a little close. Her eyes were still on Qin Ke's face, which seemed to have some kind of soft light, and her pink red lips were still slightly raised.

, showing a beautiful and shy smile that is rarely seen in ordinary times.

I don’t know how many boys I stared at for a while, and I don’t know how many jealousy jars I upset.

The boys all know that Ning Qingyun is an unattainable flower on the high mountain, and they don't expect anything to happen with her. After the lessons learned from those few brave confessions but being punished, they don't even have the courage to confess.

Yes, but it does not prevent the boys from secretly falling in love with this smart, beautiful, cool and elegant school committee member at an early age.

How could I not feel uncomfortable when I was witnessing this scene?

Even Qin Ke's roommates couldn't help but step forward and pinch Qin Ke a few times, let alone others.

Wu Shaocai, the representative of the mathematics department, is one of the secret admirers. His math score is second only to Ning Qingyun in the class, and his seat is only a few rows away from Ning Qingyun. He was originally unhappy with the idle Qin Ke, and now he couldn't bear it.

Zhu stepped forward and interrupted: "What are you discussing?"

After Wu Shaocai's interruption, Ning Qingyun came back to her senses from solving the problem and found that she was only a fist away from Qin Ke. She couldn't help but blush and retreated to her seat.

For Wu Shaocai, Ning Qingyun is relatively frequent, after all, the academic committee directly connects with the representatives of each subject.

However, the original explanation process was interrupted. Ning Qingyun couldn't help but frowned, and her voice was a bit cooler than usual: "We are just discussing the test questions for the afternoon math test. Wu Shaocai, please make the additional questions later.

Already?"

Wu Shaocai secretly glanced at the notebook in front of Qin Ke. It was indeed a mathematical problem-solving method. He thought it was written by Ning Qingyun, so he laughed and said: "No, this time the question is more difficult. I barely finished the last comprehensive question."

It’s time to hand in the big question, but I haven’t had time to look at the additional questions. Academic Committee, what about you?”

"I made a mistake in the comprehensive questions, and I couldn't do the last additional question."

Seeing that Ning Qingyun was not in high spirits, Wu Shaocai did not dare to ask her any more questions to cause her displeasure, so he turned around and fired at Qin Ke.
Chapter completed!