Zhu was concerned about the results of Zhao Jingli's consultation.

However, she was afraid that her daughter would be too careful, so she didn't ask Zhao Ruxi directly, but after Zhao Ruxi went to Beining the next day, she called Mama Yuan and asked her about the situation.

Mama Yuan told me about what a few people said yesterday.

Zhu knew that Zhao Ruxi was good at arithmetic, and she began to hear Mama Yuan say that Zhao Jingli's arithmetic talent was affirmed by Zhao Ruxi, and she was quite happy.

But after hearing that Zhao Ruxi changed her mind and didn't teach Zhao Jing to do arithmetic, her brows furrowed: "Brother Li made Sister Xi unhappy?" ”

The old slave didn't see that the girl was unhappy. The girl also said that she would ask Mr. Arithmetic in the academy for the eldest young master, and let Mr. Arithmetic accept the eldest young master as a student, so it can be seen that he should be angry. Probably because the eldest young master thought that the girl's arithmetic level was not as good as that of the gentleman in the academy, and the girl saw it, so she said so. ”

Mama Yuan's heart was partial to her own girl, and she didn't want Zhu to think that Zhao Ruxi was careful, so she gave Zhao Jingli some eye medicine a little.

My own girl is so busy, but she still finds time to teach the eldest young master painting and arithmetic, the eldest young master doesn't say that he is grateful, and he dislikes the girl for not studying well. Mama Yuan was unhappy in her heart.

Zhao Jingli knew that Mama Yuan thought of him like this, and he was going to shout that he was wronged. He didn't dislike Zhao Ruxi, he only sighed in his heart that Mr. Arithmetic in the Women's Academy was amazing.

Although the Zhu family has feelings for Zhao Jingli, his heart is still biased towards his own daughter. Her thoughts are similar to those of Mama Yuan.

She said: "Sister Xi is so busy, she doesn't even have time to sleep, and everyone is tired and thin." Originally, it was okay to paint, and no one could replace her. Now that Brother Li'er wants to learn arithmetic, he naturally wants to learn well from Mr. Arithmetic. If you can't afford to get out of the second room, I'll personally go out for him. There is no need to worry about Sister Xi'er about this. ”

"Yes." When Mama Yuan heard Zhu say this, her heart was relieved.

Madame still cares about the girl.

Although the eldest young master is also pitiful, it is all his mother's sin, and it has nothing to do with the girl.

Because of this, he has enjoyed the treatment of the prince of the original Hou Mansion for more than ten years, and he has made a lot of money. Now the uncle, the lady and the girl are still willing to take care of him, and it is a great blessing for him to find a way to help him, and he can't ask too much, otherwise he will be greedy and swallow the elephant.

On the second day, Zhao Ruxi went to Bac Ninh, went to the academy on a special trip, found Mr. Arithmetic, and mentioned Zhao Jingli's matter to him.

She said, "I've tried him, and he's quite talented in arithmetic, at least not so stupid that you want to be angry when you teach him." Can you take it and teach him? ”

This arithmetic gentleman's surname is Gan, his name is Gan Lun, he is also sixty-seven years old, and he was originally a Qing official in Zhejiang. He is also known for his arithmetic abilities.

Good students are treated preferentially in front of the teacher, and Gan Lun is very partial to Zhao Ruxi, so Zhao Ruxi dares to directly ask the old gentleman for such an excessive request.

"Teach your brother?" Gan Lun raised his eyes and glanced at Zhao Ruxi, casually took out a piece of paper, and handed it to Zhao Ruxi, "If you solve this problem, I will promise you this matter." ”

Zhao Ruxi was helpless: "Master, can't you change your routine?" ”

"That can't be." Gan Lun said seriously, "One trick is fresh, eat all over the world, haven't you heard of it?" Tricks are not afraid of getting old, and they can be useful. Hurry up and don't be verbose. ”

Zhao Ruxi had to sit down, took out his charcoal, took a piece of scratch paper, and looked at the topic.

After reading the question clearly, she looked at Gan Lun's expression and became even more helpless: "Master, where did you get the question, it's so difficult, I can't do it." ”

"If I can't do it, I can't agree to your request." Gan Lun didn't raise his head, "At that time, can't I have a drink with my old friends?" You have to suffer from this. ”

Zhao Ruxi grinded his teeth.

She knew that the old gentleman did it on purpose.

Since the old gentleman found out that she was very good at arithmetic, he started this exam mode.

He didn't know where to find these problems, so he tried his best to let her solve them, and promised benefits, such as a chic paperweight, a famous dish in a restaurant, and so on.

She can afford it herself, and it's not uncommon for these things. But the gray-haired teacher wanted to play this bounty game with her, and she couldn't bear to refuse, and she couldn't bear to disappoint the old gentleman.

When she sees old gentlemen like Gan Lun and Kang Shilin, she will think of her modern mentor.

The old man treated her as his own daughter, more dear than his own daughter, who had lived abroad for many years. She is gone, and the old man doesn't know what to be sad about.

couldn't bear to refuse, but she couldn't behave too hard, so she played this game with Gan Lun at the frequency of solving one of the three questions.

This time it was terrible, the old gentleman became more and more intensified, and caught her every time they met.

So today, Zhao Ruxi is also ready to solve the problem.

Seeing the topic clearly, she thought about it, then took a pen and counted it on scratch paper.

She wanted to delay a little bit so that she didn't look so bad. Helplessly, after a meal, she had to attend the training class, and the old gentleman also had a class to attend in the North Courtyard.

She had to do it at a normal pace.

This is an old question left over from the household, and Gan Lun actually doesn't know the answer. Seeing that Zhao Ruxi had made it and was very relaxed, he was shocked in his heart, but his face was completely impassive.

He posed as a teacher to test the students, and said, "To know what it is, you have to know why." Tell us about your idea of doing the question. ”

At the beginning, Zhao Ruxi was a little flustered when Gan Lun asked this, because she didn't know how to explain the source of her answer.

Later, she flipped through all the arithmetic books of Dajin that she could collect, and she also had a bottom of the arithmetic level of this era, so she was calm.

The arithmetic level of the Great Jin Dynasty is not low, which is equivalent to the level of the Ming Dynasty. After Empress Shengyao crossed over, she published several arithmetic books, which roughly talked about the mathematics content of elementary, junior high, and high school, and even mentioned calculus.

But probably she can't remember, or she herself can't understand it thoroughly, or she was in her old age when she wrote these books, she was ill, and she was not in good spirits. The theories she said are relatively general, and many of them are not clear, and they still use modern mathematical symbols. If she hadn't taught herself, everyone would have read her math books like they had read them.

After Empress Shengyao finished writing the book, she personally taught her two grandsons, but the two imperial grandsons were either not talented enough, or their minds were not there, and the two of them did not know much about it, and because of their status, they did not spread the knowledge they learned.

Soon Empress Shengyao died of illness, and her arithmetic books could only be explored by the scholars of the Great Jin Dynasty.

But in any case, Empress Shengyao mentioned modern mathematical knowledge, Zhao Ruxi's mathematical ability has a source, and he talked to Gan Lun about the idea of solving the problem calmly.