"What's wrong?"

Li Shimin's voice came from behind him, Li Mu suppressed his anger, turned his head and said with a smile: "Your Majesty, the quality of the pen in the minister's house is too bad, it doesn't matter, don't delay." ”

Li Mu turned his face back, the smile on his face quickly faded, and he lowered his voice and said: "If you two don't finish asking again, you will know the solution in this life, now I'll say, you two listen, don't understand and think for yourself, don't ask me again!" ”

Seeing that Li Mu was angry, Li Chunfeng and Li Tai didn't dare to ask any more. No way, who let him know the solution to this problem only in the whole world now? If you are really in a hurry, you won't teach, who can do anything? Even if the emperor hires a teacher, he has to agree to the teacher, right?

"There are three unknowns in this question, which are roosters, hens, and chicks. The three are in one, a total of 100. Now I assume that the rooster has a and the hen has b, then the number of chicks can be obtained. ”

Li Mu wrote A, B and 100-A-B, and said, "You have read Datang Daily, can you understand it when you write it like this?" ”

"Brother......

Li Tai wanted to ask a question, but Li Mu didn't give him a chance to ask at all, and continued to speak: "I also know that a rooster is worth five, a hen is worth three, and three chicks are worth one, a total of one hundred. Then we can come up with this equation. ”

Li Tai really wanted to ask, what is the unknown and what is the equation, but seeing Li Mu's attitude, he didn't dare to say the words when he came to his lips, and quietly looked at Li Chunfeng, seeing that he seemed to understand, not only sighed secretly in his heart, but he was worthy of Master Chunfeng, and he could understand.

In fact, Li Chunfeng also knows a little bit more, but he does understand a little more than Li Tai, at least he can understand what the equation means. Before he came, he carefully studied the symbols designed by Li Mu and knew that the equation should probably mean that the values on both sides are equal.

“5Xa+3Xb+（100-a-b）X1/3=100”

Seeing this, Li Chunfeng finally couldn't help it, and said: "Master Hou, may I ask what the purpose of this slash is, there is no such thing as this one in the four operation symbols." ”

Li Mu endured the anger and said: "Three chicks are worth one, so how much is a chick worth?" Naturally, one divides by three so much, but can one divide three? No, because one is smaller than three. So how do you represent this number less than one, so I invented the concept of 'fraction', fraction, fraction also. The top is the number of parts, and the bottom is the number of parts, understand? ”

Li Chunfeng suddenly realized, and hurriedly said: "I understand, I understand." ”

Li Mu was about to continue, but suddenly hesitated. Is it really appropriate to raise the level of contemporary mathematics too high at once?

The cause of the development of all human disciplines is the needs of human beings. The same is true of mathematics, the main reason for the slow development of mathematics in ancient times is not the degree of human evolution, but the degree of human needs. In ancient times, there were fewer people, fewer resources, and fewer calculations were required. Therefore, there is no need for too spiritual mathematics, and people cannot imagine the abstract part of mathematics.

But does this mean that the ancients were stupid? Of course not, it's just that the ancients used their talents elsewhere. If he forcibly raised mathematics to a higher level, Li Mu didn't think it would have much effect, and moreover, it would be eye-catching, and he would be regarded as a demon.

No, we still have to control it.

Having made up his mind, Li Mu did not list the second equation, but used the exhaustive method.

Li Mu pointed to the equation and said: "Let's look at this equation, 5Xa represents the money spent by the rooster, 3Xb represents the money spent by the hen, and the money spent by the chick can be derived from (100-a-b)X1/3. At the same time, we can also derive three pieces of information based on the question and the equation. ”

"The first, the number of chicks, is divisible by three."

"The second, the number of a and b, and the number of chickens, is a number greater than zero."

"The third, A and B and the number of chicks, are all a whole number."

Li Tai asked cutely, "Brother, what is an integer?" ”

"An integer is a number like one, two, three, a complete number!"

"Then why can't it be a score? It's like the chick's money you just mentioned......"

Li Mu's face became gloomy, he raised his hand and knocked on Li Tai's fat head, and scolded: "Have you ever seen what half a live chicken looks like?!" ”

"I'm ......" Li Tai opened his mouth, suddenly reacted, and suddenly felt ashamed, yes, there are only whole live chickens, how can there be half of them, how could he ask such a question of dementia!

Li Mu continued: "In this way, we can start with the chickens, and you have all seen the division on the Datang Daily." We take three as a divisor and divide them one by one to get some multiples of three. ”

"This is the first step, let's calculate these numbers and put them aside."

"And then there's the second step, let's assume that all the money is going to buy the rooster, so how much can the rooster buy if it's long? One hundred divided by five, up to a maximum of twenty. But the question requires a chick and a hen, so it can't be twenty, at most nineteen. In the three pieces of information that come up above, the number of roosters is greater than zero and is an integer, so the number of roosters is between one and nineteen. ”

"Then there are the hens, and so are the counts, and the number of hens is an integer greater than zero and less than thirty-three."

"Eventually, we can start trying. Starting with the maximum possible multiple of chicks, the resulting value is subtracted by one hundred, which is the total number of roosters and hens combined, and a total of thirty-three tests will give the correct answer. ”

Li Mu said, threw the pen, and said, "Calculate, I won't calculate it myself." If Master leads you into the door to practice personally, if I teach you by hand, you will never be able to learn. It is better to teach a man to fish than to teach him to fish, and I have given you the method, so try it yourself. ”

Li Tai was still a little confused, but Li Chunfeng heard some eyebrows. As for what Li Mu said, it would take thirty-three calculations to calculate, which was not a problem for him at all. In order to unravel the hundred chickens, he didn't know how many thousands of calculations, but he had not solved them, Li Mu had already pointed out the doorway, and the calculation with a goal was better than the headless flies, so he immediately stood up and gave Li Mu a deep salute, and said: "Master Hou is a great talent, not only solved the question of a hundred chickens, but also invented his own unique set of algorithms and symbols, with this, he is worthy of the name of the first person in the world." After that, Li Chunfeng saluted Li Shimin again and said: "Your Majesty, in front of the Hou Ye, the minister really does not dare to be the name of the great master of mathematics, and I also ask Your Majesty to give this name to the Hou Ye, so that the minister can feel at ease." ”

Seventeen-year-old Grand Master?

Li Shimin glanced at Li Mu and said, "Chunfeng, I know your ability." Two years ago, you commented on the Ten Sutras of Arithmetic, and both the government and the opposition admired your arithmetic attainments, and the name of this great master cannot be regarded as a gift from me, but your own ability. Now you want to transfer this title to Li Mu, he just solved a problem, is he really worthy of this reputation? ”

Li Chunfeng said with a straight face: "Your Majesty, the talent of the Hou Ye is the only one seen in the life of the minister. The ministers don't care about anything else, but when it comes to arithmetic, the Hou Ye is far more than the ministers. Your Majesty may not know that these symbols invented by Hou Ye and his four methods of operation are simple and easy to use. Even an illiterate villager, with a little wisdom and a few days of teaching, can act as the store's bookkeeper. When these four algorithms are implemented in the world, Datang will no longer lack people who know how to calculate. Your Majesty no longer needs to be enlightened to calculate a subject, isn't that a great achievement? ”

It can be seen that Li Shimin is still full of trust in Li Chunfeng, and seeing that he is so determined, he can't help but believe three points. But the name of the great master is not something that can be given lightly. Even if Li Chunfeng thinks that his skills are not as good as others, it is useless, and he has to be convinced by all the government and the opposition.

Li Shimin thought for a moment and said: "This matter needs to be discussed calmly, and you are an expert." Let's first calculate whether Professor Li Mu's method is correct, and then see how the implementation of these four algorithms is, and watch the after-effects. ”

Li Chunfeng has to say that Li Mu is indeed hungry. He didn't care at all about what the great master was or not the big grandmaster, and at this time he was more concerned about his lunch. Then he interjected: "Thank you Tai Shiling for your kindness, Ben Hou doesn't want to be a great master, whether it is the symbol invented or the algorithm, the original idea is to facilitate the use of those illiterate craftsmen in the Ministry of Industry, just forget the false name." In this way, you and King Yue are calculating here, and I still have something to report to Your Majesty. ”

Saying that, Li Mu approached Li Shimin and said, "Your Majesty, the minister has invented a new thing, which is a heavy weapon for the benefit of the country and the people. I was about to write a recital, and it happened that His Majesty came, so it was better to see it with my own eyes, and the ministers of the province couldn't understand it again. ”

"An artifact for the benefit of the country and the people?" Li Shimin was a little unconvinced, but thinking of Li Mu's various miracles, he thought that he had invented something like 'Zhenguan Plow', so he also moved his mind and said, "Where is it, take me to see." ”

"...... in the kitchen"

"Huh?"

"No, no, no, the minister is so hungry that he said the wrong thing for a while, in the minister's studio, in the studio."

Seeing Li Mu putting on a pitiful look, Li Shimin snorted and said, "It seems that I am harsh on you...... Well, I'll go to your studio first, and then you'll come back after you get something to eat. Remember, be quick! ”

Li Mu hurriedly thanked him, raised his legs and ran. He was really hungry, and secretly swore in his heart that every morning in the future, he would get up for breakfast at the words of Qiaoqiao, and never sleep lazily with Li Zhien's little goblin again.

Li Shimin shook his head and sighed, glanced at Li Chunfeng and Li Tai, who were already squatting on the ground and concentrating on calculations, and walked towards Li Mu's studio. He had been to the Zhulu Hou Mansion many times, so he could naturally find it. Up and down the house, who doesn't know who Li Shimin is. Although Li Mu's studio is not allowed to be entered, is Li Shimin an idle person? Is there a place in the world where he can't enter?

Li Shimin pushed open the door and entered the studio, suddenly his eyes froze, and he saw the night pearl hanging on the beam, and his face suddenly changed!