Jin Zuoying and Pan Ming and his party waited outside for a long time before they saw Yu Shu Shi Ran walking out from behind the painting screen, not a stage fright, so Jin Zuoying was obviously relieved.

Yu Shu walked to the back of the bookcase and stood still in a burst of earnest whispering, and then looked at Han Wenguang's disciples, and there was an extra breath of evil in her chest, but she was not in a hurry to show it, she had discussed with Xue Rui in the back just now, and she would definitely not let this group of people retreat today.

"I'm sorry, let a few people wait for a long time, I drank some wine today, my brain is not very clear, I just poured a bowl of sobering soup, it's much better," Yu Shu fiddled with the Han pottery pen holder on the table, and said with confidence:

"In the next two games, I won't be humble."

As soon as these words came out, the fast-talking female arithmetic on the other side was not happy, and said angrily: "Whoever wants you to let it, if you have the ability, you will win over us, what kind of ability is it just by talking about it." ”

A ninth-rank arithmetic dared to be so unkind to Yu Shu's fourth-class two-rank operator, I have to say that he lost the game just now, which greatly boosted the opponent's morale and killed Yu Shu's prestige.

Yu Shu was not angry, took the teacup from Lin Fu's hand, took a sip slowly, and asked Xiang Jin Zuoying: "Is it Jin Da's turn in this second game?" ”

"Exactly," Jin Zuoying stood up with a smile, "Is it the female operator who comes up with the question first, or me first?" ”

Yu Shu raised his hand: "Wait, you might as well talk about the fight later, I have a proposal I don't know if you agree." ”

Jin Zuo Yinghu said suspiciously: "What a proposal, please say." ”

Yu Shu frowned and said: "If you want to compete with me, you have to win or lose, shouldn't you also have an explanation?" Otherwise, I won you in vain, and there is no benefit at all, but in case of losing, shame and defeat are secondary, and the key is to blind the name of my female operator, so I am not wronged? ”

"This" Jin Zuoying secretly sneered at her, she still thought she could win, but her mouth was happy: "What about in your opinion?" ”

Yu Shu wiped the tea lid with his hand. He sneered in his heart and said, "If I win, in front of so many guests today, a few of you will bow to me and serve tea and admit defeat." I don't want anything else. Give me the seal of the reckoning that the superintendent has made for you. ”

Didn't they want to start anew, then she would fulfill them.

Hearing this, the five people of Jin Zuoying and Pan Ming changed color at the same time, and they looked at each other, but no one dared to accept it.

The seal specially made by Si Tianjian symbolizes their status as a great arithmetic, and it is also an honor. Isn't giving it away to others the same as slapping your face?

"What, I'm just a proposal, if you don't dare to agree for fear of losing, then forget it," Yu Shu smiled, indicating that he didn't force them, and didn't wait for them to relax. Then he said lazily:

"But this kind of competition is too boring, and I'm not interested in accompanying the next two games."

If you don't agree, then your aunt won't play with you.

The five of them were stunned. The female arithmetic master Lu Ting reacted the fastest, pulled Jin Zuo Ying behind her, and stepped forward in a low voice: "Senior brother, I see that she is trying to pass the buck, and she can't be allowed to succeed." ”

Jin Zuoying nodded slightly, and also felt that Yu Shu had lost a game, and he was resigned, remembering his teacher's instructions before leaving, no matter what, he must suppress the limelight of this female operator today. Trampling her hard, only one victory, but it was not enough.

"Well, according to your will, if you win, we will do it."

"Refreshing!" Yu Shu put down the teacup. His eyes lit up.

As soon as this appointment came out, the guests in the restaurant couldn't help but get excited, and most of the onlookers had the same mentality, that is, they hoped that things would be as big as possible.

Xue Rui stood behind the flower stand and looked at the scene in the restaurant, Rao was uneasy, but he still laughed at Yu Shu's rogue tricks.

Seeing Yu Shu with such a demeanor, Jin Zuoying inevitably muttered in her heart, vaguely aware of something wrong, but did not think deeply, stepped forward and stood behind the table, and asked her who would come up with the question first.

Yu Shu held the pen in one hand and said: "Jin Da has already prepared, so I will come up with the question first, let me think about it for a while." ”

Jin Zuoying nodded, a flash of confidence flashed in his eyes, and he asked: "Chamber of Commerce discussion, there are eight chairs lined up, four stewards are seated, each occupies a seat, and there are just three adjacent chairs vacant, let me ask you how many ways to arrange seats at most?" ”

Yu Shu just lost once, he couldn't help but be careless, and after listening to his question intently, the corners of his mouth moved, and he almost couldn't hold back his laughter!

This seems simple, but in fact there is a hidden mystery of the ranking problem, in ancient times, if you want to answer, I am afraid that there is only one way to list, time-consuming and troublesome, and easy to make mistakes, it does not take an hour or two, you can't figure it out.

The other party is obviously in trouble, how could he have imagined that hundreds of years later, there would be a genius who would study a magical mathematical theory, called permutations and combinations.

Yu Shu held back his smile and copied the question word by word on the paper.

At this moment's time, some people here have already calculated and whispered an argument:

"This question is not difficult, I have three ways to arrange it."

"Where there are three, there are clearly five, like this"

"You're not right, there are more than a dozen!"

Xue Rui turned his head and looked at Pei Jing and He Fangzhi, who had just heard the wind and rushed down from the upper floor to watch, and said, "Does Mr. Pei have a solution to this question?" ”

Pei Jing frowned, looked at Yu Shu's young and vigorous back worriedly, and said: "Trouble, you have to go to the row one by one, according to my estimate, there are no less than a hundred and ten methods, I'm afraid that she will be sloppy." ”

Xue Rui groaned, He Fangzhi was not proficient in mathematics and physics like him, so he could only ask from Pei Jing, who was a great arithmetic: "Then according to you, what are Xiaoyu's chances of winning?" ”

Pei Jing shook his head and motioned for him to look ahead: "What will happen to Xiaoyu?" ”

Yu Shu didn't know that someone was worried about her, so she stopped her pen, looked up at Jin Zuoying's leisurely appearance, a wicked smile curled up at the corner of her mouth, and cleared her throat:

"It seems that Jin Da is good at this kind of topic, since this is the case, I will quote it, you listen to my topic - there was a year of martial arts, only six martial artists participated, if the Ministry of War requires, these six martial artists can only meet once, and each person needs to be compared just two, just ask, how many kinds of comparisons can there be?"

Her problem, at first glance, is not difficult, on the surface and Jin Zuoying are the same type, but in fact, there is a hidden murderous machine, the solution is not a simple permutation and combination, but involves a higher level of concepts in the field of mathematics - graph theory.

These fake pedants who don't even know what the permutations and combinations are, if they want to solve this problem, they can really only think about breaking their scalps.

Jin Zuoying probably hadn't discovered the difficulty of this question yet, so he copied this question calmly, and he didn't know how to think about it quickly, and he still had time to ask the guys in the restaurant to add tea to him.

Yu Shu saw his behavior in his eyes, rolled his eyes secretly, and waited to see him wait for a white face.

At first, I thought that these two questions were not difficult, but as I spoke, I found that I didn't have an accurate head at all, but I made myself dizzy and had a headache when I thought about it.

Besides, Xin Liu and the others who were standing at the counter were also discussing in a whisper, Feng Zhaomiao counted with his fingers for a while, then wrapped himself in, scratched his ears and cheeks, and said:

"It's obviously quite simple, why is it so difficult to sum up, you wait, I'll ask for pen and paper."

Xin Liu hurriedly said, "Bring me a pen too." ”

Qin Yuerou didn't join in the excitement, but quietly watched the scene, her eyes back and forth between Yu Shu and Jin Zuoying.

I saw that the Jinda arithmetic master was not in a hurry at first, but after a while, his face turned different, and his pen gradually became hurried, and after a while, he stared at the paper in a daze.

On the other hand, Yu Shu didn't even have an abacus from beginning to end, lying in front of the desk, not knowing what to write, and his demeanor was extremely elegant, but he didn't see the panicked appearance of the first fight, as if he had changed a person.

Pan Ming stood not far behind Jin Zuoying, watching him pause and be stunned, frowned, and called in a low voice: "Senior brother, don't worry, take your time." ”

With Pan Ming's level, he has already perceived the difficulty of Yu Shu's question, so Zhilu Dao Jin Zuoying is a little panicked at this time, the most taboo thing in arithmetic is confusion, once the mind is disordered, it is easy to make mistakes.

To be a great Yi teacher, you have to be careful and patient, Jin Zuoying heard Pan Ming's reminder, calmed down a lot for a while, and secretly told himself not to worry, there is still a lot of time, just as he lifted the pen and wanted to continue to calculate, he heard a chuckle from the other side:

"Jin Da calculates and stops writing, I have a solution."

Jin Zuoying was stunned for a moment, looked up at Yu Shu, and didn't believe that she could calculate a result in such a short time, unless it was a miscalculation. You must know that the question of Lu Dao was written by the teacher himself, and among all the teachers and brothers, the clearest mind will also be ranked for a long time.

Thinking about it like this, he felt relaxed, since she had miscalculated, then this competition was undoubtedly his win, and he didn't have to solve the strange problem she came up with.

Jin Zuoying put down the pen self-righteously, and raised his hand to signal Yu Shu: "What's the explanation?" ”

"There are four hundred and eighty ways to rank."

Hearing this, Jin Zuoying's ears rang for a moment, and he felt dizzy, his body shook unsteadily, and he held on to the corner of the table before standing firmly.

Looking at the few people behind him, Pan Ming, who also knew the correct answer, was stunned, and the next moment his face turned red, and he strode forward with some excitement, and blurted out Yu Shu: "How did you calculate it?" ”

Seeing this situation, everyone who is not stupid here can see that Yu Shu is the right solution.

Four hundred and eighty kinds, some people sighed, and one by one changed their eyes to stare at Yu Shu, and at first glance, no one knew how she expelled four hundred and eighty methods in less than a cup of tea!

After the flower stand, Xue Rui's bright eyes fell on Yu Shu's increasingly slim figure, and Pei Jing chuckled with great relief, shook his head, and sighed to himself.

The female arithmetic teacher Lu Ting reacted half a beat slower, and asked Pan Ming with her head covered: "Teacher, senior brother, is she accurate?" ”

Pan Ming was in no mood to pay attention to her, and stared at Yu Shu stubbornly, his eyes were slightly green, as if he wanted to break her brain and see what was inside.

"I wonder how I figured it out?" Yu Shu looked at the other side for a long time, and when he saw Pan Ming nodding, he winked at him slyly, and his voice was loud:

"If you worship me as a teacher, I will teach you."