In the afternoon of the next day, Zhao Yan still came to Xianwei to give a lecture like yesterday, and there were more people listening to the lecture below than yesterday, mainly because some Taoist priests from afar arrived yesterday, and the people who listened to the lecture brought by Ouyang Xiu yesterday also notified some relatives and friends, and as a result, the number of people listening to the lecture increased to more than 300 people at once.

Ouyang Xiu didn't come today, but this is also normal, after all, Ouyang Xiu is busy with government affairs, and it is very rare to spare an afternoon yesterday, and it is absolutely impossible to come to the lecture every day, but Zhao Yan saw Han Qi, another minister in the political affairs hall, Han Qi is one of the hundred officials, he can come here, which also makes Zhao Yan feel very surprised, but the accident is an accident, anyway, he is a public class, whoever wants to come to listen to it, as long as he doesn't make trouble for himself.

However, as the so-called fear of something, Zhao Yan just came to the stage, and before he started to talk about today's lesson, he saw a middle-aged man with an arrogant expression suddenly standing up below: "Your Royal Highness the King of the County, I heard that you are going to talk about arithmetic today, but there is a topic below, I wonder if the King of the County can give advice?" ”

Seeing that this middle-aged man came to kick the field regardless of the rules, Cao Tong and others, as the organizers, all changed their faces, and the other people who listened to the class also had different expressions, including shock, disdain, excitement, and so on. Zhao Yan glanced at the other party a little angrily, only to see that this middle-aged man was wearing civilian clothes, not from the Daomen, and he hadn't seen him yesterday, it seemed that he had just come today, plus as soon as he opened his mouth, he asked for arithmetic, it seems that he should have some research in arithmetic.

"Oh? I don't know what this brother is called? Zhao Yan glanced at the other party lightly and said, in front of so many people, of course he can't show weakness, otherwise there will be no way to continue this lesson, and strictly speaking, he has not yet started to speak to the other party and stand up to ask for advice. This is not considered a violation of the order of the lecture, so he can't just kick the other party out.

"He Heng, a doctor of supervision in Xia Guozi, also ask the king of the county to give advice!" The other party bowed to Zhao Yan and said, Guozijian is the highest institution of learning in the Great Song Dynasty, and there are Guozixue, Taixue, Law, Arithmetic and other categories in the prison, among which there are two doctors in arithmetic. Then this doctor is not the same as the doctor of later generations, but it is not much different, and most of them are people with professional skills, this He Heng has just reached middle age and became one of the two doctors of arithmetic, and he must also have considerable attainments in arithmetic.

"Hehe, it turned out to be Dr. He, I don't know what topic you want to ask this king today?" Zhao Yan smiled lightly and said, no wonder this guy dared to stand up in front of so many people and challenge himself, it turned out to be Guozijian's doctor of arithmetic. It is said that most of the guys who teach in the Guozi Prison have a stinky and hard temper, and today I finally saw it.

"The subject is like this, today there is one chicken, and it is worth five; The hen is one, and it is worth three; Three chicken chicks, worth one, where 100 dollars to buy 100 chickens, ask the chickens and hens how much they are? He Heng saluted Zhao Yan again. However, although he seems to be very polite on the surface, his demeanor is still very arrogant. There was even a little disdain in his eyes when he looked at Zhao Yan, it seemed that he had already concluded in his heart that Zhao Yan was a person who did not learn and did not know how to do it, and it was even more sensational to come here to give lectures, and he could take him down with a random problem.

Zhao Yan was dumbfounded when he heard this topic, this title of 100 coins and 100 chickens translates to 5 cents per rooster and 3 cents per hen. Three chickens for one penny, and then give one hundred wen, must buy back a hundred chickens, in the mathematical perspective of later generations, this is actually an indefinite equation problem. It's a little harder, but it's not that hard to figure out.

"Dr. He's question is not difficult, so let's do it, Ya'er next to me has been learning arithmetic with me for a few months, so let her answer it for me!" Zhao Yan suddenly had an idea at this time, pointed to Ya'er beside him and said with a smile, this problem is enough to solve with Ya'er's ability, and his own students make this problem on their own, which also makes Zhao Yan's arithmetic unfathomable.

"You ......" Seeing that Zhao Yan actually asked a one-year-old girl to do this question by herself, He Heng was also a little angry, although this question was made by him at random, but it was so difficult that even the top students in the Guozi Prison might not be able to do it.

When the other people who were listening to the lecture saw this, they also looked at each other, and most of He Heng's questions couldn't be solved either, but Zhao Yan now let a little girl solve this problem, and it seems that she is still confident, this is a little too arrogant, right?

Ya'er is a big ghost, and at this time she immediately understood the teacher's intention to let her do the question, and she saw that many people below looked at her with suspicion, which also aroused Ya'er's competitiveness, and then saw her take a step forward, and showed a sweet smile to He Heng and said: "I have calculated Dr. He's question, there are three sets of answers to this question, which are 4 roosters, 18 hens and 78 chicks; 8 roosters, 11 hens and 81 chicks; 12 roosters, 4 hens, 84 chicks, if Dr. He doesn't believe it, you can check it! ”

Ya'er is an arithmetic genius, she not only learns mathematical theories very quickly, but also has extremely terrifying mental arithmetic ability, most of the questions need to be looked at at to get the correct answer, which even Zhao Yan is ashamed of.

"Wow~" Seeing that the little girl next to Zhao Yan actually got the answer to the question in the blink of an eye, the people listening to the class below were also in an uproar, and some were unwilling to immediately pick up the pen and paper to check, and soon the three sets of answers were all correct, but because Ya'er's table was too amazing, some people were already wondering if He Heng was deliberately arranged by Zhao Yan, the purpose was to let Zhao Yan use this to establish his prestige in arithmetic.

"This ...... That's impossible! He Heng was also stunned by Ya'er's expression, especially when he felt the suspicious gazes of the other people around him, which made him feel like a man's back, and finally gritted his teeth and said again: "Your Royal Highness, there is still a question I want to ask for advice below!" ”

"If you have any questions, just ask them, and if other people have math problems, you can stand up and ask questions!" Zhao Yan said with a smile, he also knew that Ya'er's appearance made the people below a little suspicious, so he said so, as for Ya'er's ability, he definitely didn't doubt it, not to mention that even if Ya'er couldn't answer, it wouldn't be ashamed, after all, she was still a child, and he would help her answer it when the time came.

Sure enough, Zhao Yan was so bold to let everyone ask questions, which immediately caused an uproar below, He Hengxian was unconvinced and asked a difficult question again, this time it was a topic he carefully selected, which was much more difficult than before, but it was still nothing for Ya'er, the answer was calculated in the blink of an eye, and then other people also came up with questions, but unfortunately none of them could stump Ya'er, at most, Ya'er picked up the chalk and played it on the blackboard, which also made the people below appear, they couldn't understand a word of what Ya'er wrote, But in the end, you always get the right answer.

The question before class lasted for most of the hour before it ended, and in the end, no one dared to stand up, Ya'er's mathematical ability was unanimously recognized by everyone, as for He Heng, he sat there with a dejected face, not daring to look at Zhao Yan at all, and the others were also discussing, their eyes kept turning on Zhao Yan and Ya'er.

It was only at this time that Zhao Yan stretched out his hands to make the people below quiet, and then said with a smile: "I know that Ya'er's ability surprises everyone very much, but Ya'er is different from ordinary children, she is extremely talented in arithmetic, and she can be called a prodigy in arithmetic, so after only following me for a few months, she already has such an achievement, but if ordinary people want to learn Ya'er's Cheng dù, it will take several years of hard work, I have to make this clear in advance, so as not to misunderstand." ”

The people below were all very surprised again when they heard Zhao Yan confess like this, because if he didn't say it, others wouldn't know, and they would only attribute Ya'er's ability to him as a teacher, and at the same time, it would also make Zhao Yan's reputation shocked, but now his confession, although it will still make Zhao Yan famous because of it, the effect will be greatly reduced. However, this also made Zhao Yan more honest, and most of the people present were more convinced of Zhao Yan.

Next, Zhao Yan began to give a formal lecture, just like the previous course to Xue Li, it still started with ten Arabic numerals, and slowly brought the people below into the world of numbers and operation symbols, the people listening to the lecture below were not Xue Li's children, they were either the elites of the Daomen, or the leaders among the scholars, especially those who were proficient in arithmetic like He Heng, who could better appreciate the benefits of this kind of mathematics taught by Zhao Yan, and they were all fascinated by listening.

Time passed quickly, when Zhao Yan finished today's lesson, the people listening to the lecture below no longer had any doubts about Zhao Yan's talent, and even people like He Heng, who had deliberately come to find fault, were convinced by Zhao Yan, when Zhao Yan announced that today's lesson was over, these people all stood up together, and then gave Zhao Yan a teacher-student salute, in order to express their respect for him.

In the next few days, Zhao Yan began to repeat this life, going to the elementary school every morning to teach, and in the afternoon to give microscopic lectures. In addition, it is worth mentioning that with the spread of the lecture content, more and more people began to come to listen to the lecture, which also made Zhao Yan's reputation great, and Zhao Yan's name was discussed in the Shilin in the capital for a while.

In a blink of an eye, seven days passed quickly, and the telescope that Cao Tong promised was finally manufactured, and many people were looking forward to this day, hoping to really see the true face of the moon. (To be continued!)

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