The second round of the competition is Karakuri, to put it bluntly, it is actually mathematics, that is, mathematics.

This round of competition was not hosted by Fu Yuewen, but another old man behind him.

"Zhang Heng, the secretary of the Ministry of Labor, the second round of the competition was presided over by the old man, there are three test questions, which have been placed in front of you, the time is two incense, please answer the questions. Zhang Heng doesn't seem to be good at words, and he has explained it clearly in a concise and concise manner.

At this time, everyone had already sat down, and in front of each person, there were test papers, on which three math problems were neatly copied.

Yan Yiyan didn't look at the scroll for the first time, but looked at Yang Xuan behind him.

After a few glances, there was a hint of provocation in his eyes, and then he looked at the scroll.

Yang Xuanli ignored him and looked directly at the first question.

"Today, there are chickens and rabbits in the same cage, there are thirty-five heads on the top, and ninety-four feet on the bottom.

Yang Xuan almost laughed, the problem of chickens and rabbits in the same cage would have been done by the fifth-grade students of elementary school in his previous life, how could he stump him, a serious undergraduate.

After giving an answer in three or two clicks, he looked at the second question.

"Today, there are two people, A and B, walking in the opposite direction, and one of the dogs and A set off at the same time, and B turned back, and then A turned back......"

Some numbers were given at the back, Yang Xuan swept it slightly, if he remembered correctly, this problem was still an encounter problem in the five years of mathematics in primary school.

It seems that the level of the person who asked the question is only in the fifth grade of primary school.

But he was embarrassed.

He didn't know how to do this problem, what he was worried about was how to transform all kinds of mathematical symbols from his previous life into the written expression of this world.

Finally, he finished the question, and he looked around, and the expressions of everyone were in full view.

Some frowned, some gritted their teeth, and some even simply put their pens still on the table and began to be in a daze.

Yang Xuan smiled secretly.

The ancients emphasized literature over reason, and the development of mathematics was relatively lagging behind, even if he almost forgot the mathematical knowledge taught to him by his teachers in his previous life, but the remaining part may still beat the people of this world.

After sighing, he turned to the third question.

At this glance, his brow was already slightly furrowed.

It's not that this third question is so difficult, but that this third question should actually be two questions.

"There is a pillar today, I don't know its height, how to measure it, and there is a circle, I know the length of its week, how do I know the width of the left and right?"

The proportional equation and the diameter of the circle?

Yang Xuan jumped out of these two knowledge points in his mind.

The proportional equation and the diameter of the circle are both knowledge points in the sixth grade of primary school, which is one level higher than the fifth grade just now, and the level has improved.

After thinking about it, he took up his pen and wrote a few words on the scroll:

The column has a shadow, and the shadow can be known.

The circle has a circumference, and the circumference is straight.

Two simple sentences, if placed on the earth, can be understood by sixth-grade elementary school students, but they are placed here...... I'm afraid no one can understand.

Yang Xuan keenly felt that these last two questions were probably the key to this second round of competition.

After writing these two sentences, he got up and left his seat.

At this time, everyone in the hall was still thinking about it, and when they saw him get up, they were all shocked.

Yan Yiyan was a little stunned, he had just thought about the second question at this time, and just had some eyebrows, he didn't expect that Yang Xuan had already handed in the paper.

I'm afraid it's not nonsense, he thought maliciously.

He really couldn't believe that Yang Xuan could solve these three questions that were difficult for him in such a short period of time.

No way!

He gritted his teeth secretly, withdrew his thoughts, and concentrated on thinking.

Wang Zhuo also looked at Yang Xuan, his eyes flickering.

He was also a little unsure of Yang Xuan.

On the contrary, Jin Chengfeng just swept Yang Xuan slightly, and then lowered his head and pondered again.

Everyone reacted differently, but they were all a little surprised by Yang Xuan's early submission.

Zhang Heng and the others glanced at each other, and then walked directly in front of Yang Xuan.

"Ren Gongzi, you are ......"

"It's too simple, it's over. Yang Xuan made an impatient look.

Zhang Heng's nose was almost crooked, these three questions were all from him, even if it was him, it would take a lot of effort to answer. Especially the third question, which is extremely involved, no one can solve it until now, and he put it on the test paper this time, just to see if there are any new ideas, and he doesn't expect anyone to answer it.

Angry, he directly picked up Yang Xuan's scroll and read it.

As soon as he looked at it twice, his face changed completely.

Yang Xuan's answers to the first two questions turned out to be completely correct.

"This is impossible!" Zhang Heng was shocked beyond measure, even if he was the first two questions, without knowing the specific method, I am afraid it would take a lot of effort to solve them.

However, Yang Xuan was able to do it completely right in a very short period of time, and he couldn't understand the method he used for a while, I am afraid that his attainments in mathematics have left him far behind.

Shocked, he returned to the other people with Yang Xuan's scroll, and after a little explanation, the eyes of several old men turned over.

Then, under the gaze of several people, Zhang Heng reflexively entered behind the screen.

After a while, he came out to Yang Xuan's side again: "Ren Gongzi, please come with me." ”

Then, he took Yang Xuan directly behind the screen.

Everyone in the hall looked at each other, a little at a loss.

Bypassing the screen, Yang Xuan realized that there was actually no one inside, but a door.

As Zhang Heng pushed the door in, there was a relatively small room inside, there were already several people in the room at this time, several people guarded it, and there was a door, and the curtain hung down on the door, so that he couldn't see the situation inside.

Yang Xuan originally wanted to scan with his divine thoughts, but after thinking about it, he forgot it.

"The son is highly talented, and his literary talent is outstanding, but he didn't expect that he would have such a deep attainment in mathematics. ”

An old female voice came from behind the curtain, speaking slowly and calmly, but full of irresistibility.

Yang Xuan's heart froze, this voice seemed to contain a trace of the power of heaven and earth, making his blood almost coagulate.

The aura worked slightly, and after dissipating this strange feeling, he said slowly: "Pass the prize!"

He had a feeling that the woman behind the curtain knew his identity absolutely.

"Childe said, I know that the shadow is long, and I can measure the height, I don't know how?" asked the person behind the curtain.

Yang Xuan did not hide it, and said cleanly: "Choose a sunny day, set up a wooden stick on the ground, measure the shadow length of the wooden stick, and then measure the shadow length of the high column, then the length of the wooden stick is times the number obtained by the shadow length, and the number of times the length of the pillar is the same." ”

The room fell silent, and after a while, Zhang Heng slapped his thigh violently: "Yes, why didn't I think of it." ”

The person behind the curtain voiced, "Is it possible?"

Zhang Heng's face flushed with excitement: "It's feasible, it's feasible, it's not no, it's absolutely feasible." ”

He ran to Yang Xuan, and excitedly grabbed Yang Xuan's hand and shook it violently: "Thank you, thank you......"

Yang Xuan could understand his mood, such people who studied mathematics were a little paranoid, and the excitement and joy of solving a difficult problem that he had been thinking about was unimaginable to ordinary people.

The person behind the curtain sighed and said, "Childe is really talented, so what about the method of knowing the circle and measuring the straight?"

Yang Xuan smiled, but did not answer, just smiled silently.

This involves pi, how can he easily tell others?

"What does Childe want?" The person behind the curtain saw Yang Xuan smiling and silent, and already understood that he wanted to wait for the price and sell.

"What did Your Excellency take in exchange?" Yang Xuan didn't beat around the bush, and went straight to the point.

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