back to ancient times to be emperor

Chapter 48
The sixth-rank official walked into the Daqing Palace like a breeze with strides, bowed slightly and said: "Chen Su Song pays homage to Your Majesty!"

Anyone who is familiar with history will definitely be surprised at this moment.Su Song and Su Zirong are the number one talent in the Northern Song Dynasty. His achievements can definitely match that of a great writer like Su Shi, although he is not good at writing.In history, Su Song was an extremely intelligent and studious person. After studying the nine streams of history and theories of a hundred schools of thought, he knew everything about arithmetic, topography, Shanjing, Materia Medica, exegesis, and lulu.According to the current words, he is a good student with all-round development of morality, intelligence, beauty, physical and labor.In history, Su Song led the manufacture of the world's oldest astronomical clock "Water Transport Instrument Platform", which opened a precedent for modern watch escapements.This was a very remarkable achievement in ancient times, and the wisdom of the ancients can be seen.

Historically, Su Song was only 22 years old when he passed the Jinshi examination in the second year of Qingli.Su Shi also passed the Jinshi examination at about this time, but the ancient craftsmen were unknown, and the world knew the three Sus, but they didn't know that there were Su Songs.

And in this different time and space, the genius is still so genius, Su Song also entered the rank of Jinshi early, but unfortunately he was only obsessed with inventions and creations, and did not cater to his boss. He is still only a sixth-rank official, and his position is only a military supervisor.

Lu Chengqi only has a little understanding of history, and he is not proficient. He doesn't know such a talented craftsman as Su Song, which shows how little the ancients paid attention to craftsmen.However, this does not prevent Lu Chengqi from admiring Su Song.

Lu Chengqi said: "Since Su Qing is so confident in arithmetic, I want to test you. There is a problem of chickens and rabbits in the same cage in "Sun Tzu's Mathematical Classics". Today, there are 35 chickens and rabbits in the same cage. Feet, how many chickens and rabbits are there? How does Su Qing calculate?"

Without even thinking about it, Su Song said directly: "There are twelve rabbits, and twenty-three chickens."

Although Lu Chengqi knew that this question was nothing in later generations, it was just solving equations by setting equations, but in ancient times, it was a difficult problem for most people.And Su Song calculated the answer in his head almost without blinking his eyes. This kind of mental calculation is really terrifying.However, this "Sunzi Suanjing" has been written for a long time, even if Su Song has read it and remembered it, it is nothing.

Lu Chengqi decided that it would be more difficult to pay: "Nine hundred and ninety-nine coins, one thousand pears in time, nine pears for eleven coins, and four pennies for seven fruits. Question: How much is the price of pears?" This is The topic in "Siyuan Yujian" compiled by Yuan Dynasty mathematician Zhu Shijie is a practical problem in modern language: "With 99 Wen coins, you can buy a thousand pears and fruits, and you can buy nine pears with eleven Wen coins. , Fruit Siwen buys seven. How many pears and fruits each, and how much do you pay for each?”

Lu Chengqi is sure that only he has read this book in this different time and space, and Su Song will never read a similar title.In this way, Su Song's true level can be tested.

The ancients were a little difficult to calculate division, but it seems that Su Song cannot be tested.Seeing Su Song walking a few steps in the Daqing Hall, he came up with the answer: "Pear 650 seven, a total of 340 wen; fruit 190 three, a total of [-] six wen."

Lu Chengqi was so excited that he almost bounced off the dragon chair. It was the first time he had seen such an ancient man with such a powerful mental calculation, and he was even more shocked than seeing Su Shi!

In fact, this is equivalent to a problem in elementary school, so why is it so rare that Su Song, a great scientist who can create a "water transport instrument platform"?It's just that Lu Chengqi had never seen such a quick mental calculation person, so he was shocked for no reason.

Lu Chengqi managed to suppress the excitement in his heart, he knew that he had found a rare talent.He couldn't help becoming interested, and continued to ask: "I only heard that the customers next door divided the money, but I don't know the number of people. I don't know the number of people. Four taels are more than four taels, and half a catty is less than half a catty. May I ask, how many customers are there?" After all, most people think that this question is a bit wrong. That is because in ancient times, one catty was equal to 16 taels. If one catty is ten taels to calculate, of course you will get a different answer.

Su Song smiled slightly and said: "It's very simple, there are three guests, and there are 16 taels of silver."

Lu Chengqi is running out of questions, he only remembers a few interesting questions about ancient mathematics, what should he do now?Suddenly, he caught a glimpse of a big tree outside the hall, and came up with an idea: "Come here, go and measure the length of the shadow of the big tree outside the hall, and the angle between the sunlight and the ground?"

The servants looked at each other, they could measure the length, but how to measure the angle?They didn't dare to move, for fear that if they didn't do well, the emperor would blame them, and no one would be able to bear it.

Just as Lu Chengqi was about to get angry, Su Song said with a smile: "Your Majesty, it is only natural that the little Huangmen doesn't know how to calculate. I would like to measure it!"

Lu Chengqi pondered for a while, then said: "Su Qing, you can calculate the height of the big tree outside the hall based on the length of the shadow and the angle between the sunlight."

After Su Song heard the words, he turned around and left, before turning around for a cup of tea, he said, "Your Majesty, I have the answer."

Lu Chengqi smiled and said, "How tall is the tree?"

Su Song said: "The length of the shadow is three feet long, and the included angle is thirty feet. The height of the tree is about one foot six feet six inches."

This time, Lu Chengqi was really convinced.This question uses the content of trigonometric functions. Unexpectedly, Su Song can even solve trigonometric functions. What else can Lu Chengqi say?

Lu Chengqi sighed: "Su Qing is indeed a great talent. I have decided that you will be the examiner for one subject! I won't be ashamed of it, and you will also come up with a good topic. Just show it to me."

Su Song did not expect that after more than ten years in the officialdom, he would only get a chance to show his strengths in middle age.The chief examiner of Chunwei, that is a shortcut to the top of the imperial court, and anyone who changes it will be so happy that he is going crazy.Su Song was overjoyed, bowed and said: "I will live up to your majesty's trust!"

Lu Chengqi confirmed the examiners for each subject one by one, and they left early in the morning.What he didn't know was that in the future, this anecdote would be called the right thing to do by good people, and it became a good story for a while.Due to Lu Chengqi's love for mathematics, books on mathematics on the market were sold out.Even the vigorous development of movable type printing cannot make up for the shortage of supply.

Lu Chengqi was quite proud when he learned that there was an upsurge in studying mathematics in the world: "Mathematics is the king of science. There were many smart people in ancient China. Unfortunately, they were all used to read the Four Books and Five Classics. What a waste of talent! , Even if you study arithmetic, you can be an official, so that the wisdom of these official fans can be stimulated..."

I don't know how many smart people there are in Chinese history, but under the tide of official standard thinking, all of them were submerged in the imperial examination.After entering the officialdom, he was caught in intrigue and intrigue, unable to extricate himself.For the study of arithmetic, unless you are extremely interested, it is possible to touch it.The style of study in the Dashun Dynasty was not as restrictive as in the Ming Dynasty, and arithmetic was not forbidden. Even in private schools, the husband would teach students who were interested.It's just that arithmetic is not tested in the imperial examination, and there has been no major breakthrough development.

In fact, the abacus has already appeared in the Dashun Dynasty.Lu Chengqi intends to make the abacus a compulsory subject when taking the arithmetic test. After all, it is the earliest calculator, so it needs to be well developed, and strive to make the discovery of many theorems appear in China, even if it is in China in a different time and space.

Lu Chengqi said in his heart: "Mathematics, that's the king of science. Without the aid of mathematics, even if I can develop a powerful weapon, it will only be a flash in the pan, and it won't last forever..."

(End of this chapter)