"You must have heard the answer I just said, or you have seen this question before!" Li Xuan was stunned for a moment, and then said with great certainty.
If Li Yi gave the answer after or even within one stick of incense, he would be surprised, but it would be within his ability to bear.
After all, in his eyes, even if Li Yi is not the smartest person in Jingguo, he is not far behind.
And as soon as he finished asking the question, Li Yi was able to tell the correct answer in one breath. He was not a human, he was a monster.
This time, Li Xuan really guessed wrong. He suddenly jumped up like hysteria just now, which startled Li Yi. He didn't want to listen to what this guy said.
Although I have seen similar questions before, if I change the number, the answer is different. There is no second possibility he mentioned.
To the question of chicken and rabbit in the same cage, in future generations, I am afraid that as long as primary school students who have studied the Mathematical Olympiad will be able to tell the answer in one sentence, there is no need to cheat at all.
Isn't it self-defeating to test yourself with questions that are difficult for elementary school students?
"Haha, if you want to default on the bill, just say so, why bother making such excuses." Li Yi curled his lips, looked at him, and said with disdain.
Li Xuan's handsome face turned red. It was indeed unpleasant to tell the story of a noble prince, but he was more eager to know how Li Yi got the answer.
"As long as you tell me how you solved this problem, in addition to the one hundred taels promised, I will lose you another one hundred taels." To Li Xuan, money is just a number, he is more interested in
The novel methods Li Yi throws out every time.
Even Li Mingzhu's eyes were on Li Yi. She knew this question but didn't know why. She tried it one by one. After spending a little time, she could naturally try to find the answer, but he could figure it out so quickly.
, if they didn’t know the answer in advance, or they used a method that they had never seen before.
Money is just a number to Li Xuan, but not to Li Yi. It is a brick, a tile, a room in a big house...
"You just said - there are thirty-five heads on top and ninety-four legs on bottom?" His opening showed his acquiescence in Li Xuan's move of giving money just now.
Li Xuan nodded repeatedly.
"Let's assume, it's just an assumption..." Li Yi stretched out his hand and gestured, "Assume that these chickens and rabbits are well-trained."
Li Xuan looked confused and just solved the problem. What does it have to do with whether these chickens and rabbits are well-trained?
However, since Li Yi never took the ordinary path, he still thought he would listen first.
Li Mingzhu frowned when he heard this, and then quickly let go, obviously having the same idea as Li Xuan.
"If these chickens and rabbits are very obedient and clap their hands, they will lift one foot..."
"How can there be such a solution?" Li Xuan couldn't listen anymore. How could there be such obedient chickens and rabbits? If such a bizarre method can make sense, then just let the chickens and rabbits speak human words and speak the same kind of words themselves.
Forget the number.
Li Yi glared at him, "Do you still want to know the method?"
"If you keep talking nonsense like this, there will be no money left." Although Li Xuan was stupid, he was not that stupid.
"Keep talking." Li Mingzhu seemed to understand something, her eyes flashed, and she urged.
Li Yi glanced at Li Xuan with complicated eyes, and Li Xuan understood what he meant.
He was laughing at himself for not even being as good as a pearl.
However, Mingzhu had been smart since childhood, and Li Xuan discovered this when he and he were taught by his master in the palace when they were young.
Although this is an indisputable fact, why does it feel so bad in my heart?
"Clap your hands once, and a total of thirty-five legs will be lifted. Clap your hands twice, and a total of seventy legs will be lifted. At this time, all the chicks are sitting in the cage. There are no legs to count, and each rabbit has two legs.
Legs, the remaining legs in the cage are twenty and four, so the number of rabbits is twelve, and the number of chickens is twenty-three."
As Li Yi slowly spoke, Li Mingzhu's eyes shone brightly, while Li Xuan was dumbfounded.
At this moment, I am afraid that only the galloping of thousands of horses can describe the true feelings in his heart.
Is this his mother okay too?
The problem that had been bothering him for a whole day could be solved with just two claps?
Isn't that what the old man said yesterday?
It is said that this is a difficult problem that has been passed down from ancient times. Even if it cannot be solved, it does not matter, because the Master himself only knows the answer and does not know the specific solution.
He turned back and glanced at Li Yi - he was indeed a demon!
Li Xuan's expression was all seen by Li Yi, and he wasn't too surprised by it.
There are no Arabic numerals, no linear equations in two variables in this world. Mathematics can only be called arithmetic at best. It is still in the stage of ignorance. It may take a few hundred years for a master of mathematics to rise up, who is still an astronomer or an astronomer.
Taoist priest……
After all, these are not tested in the imperial examinations, and arithmetic is not highly valued. It is not unusual for the problem of a chicken and a rabbit in the same cage to stump the Imperial Academy Doctor of Arithmetic.
The method he just used is called the "Leg Raising Method". It is not a joke on the Internet that will make people laugh. This is indeed how this problem is solved in the ancient arithmetic classic "Sun Zi Suan Jing".
It can be inferred from the reactions of Li Xuan and Li Mingzhu that "Sun Zi Suan Jing" either does not exist in this world, or it has been too old and this method of solving problems has been lost.
"It's really unbelievable that there is such a method to solve the problem." Li Xuan couldn't help but admire.
In fact, he was not very interested in arithmetic. He just wanted to solve this problem and impress his teacher. He thought about it for a whole day before he tried out the correct answer in his mind, and then used Li Yi's new approach.
The method only takes two breaths.
"It's unbelievable, isn't it? It doesn't matter, we can try another method." Li Yi was still very kind. He wanted to at least make Li Xuan feel that losing the two hundred taels of silver was worth it.
"There are actually other ways?" Li Xuan exclaimed and leaned his head over.
"First, you need to remember a new counting method..."
Li Mingzhu and Li Xuan watched Li Yi write and draw on the rice paper. Those strange simple shapes were something they had never seen before. When combined, they turned out to be a new counting method.
Both of them had received aristocratic education and had profound knowledge. Although this thing seemed novel, it was not difficult to understand. After Li Yi's simple explanation, it took a little time to neutralize this set of rules.
I was amazed in my heart. This method is undoubtedly much better than Jing Guo's current counting method, and it is more convenient and simple...
"This is called the equal sign, this is the plus sign, the minus sign, and this cross can be understood as a number that is not yet known..." Li Yi didn't think so much at first. When he really started to explain, he realized that he should popularize these for them.
Knowledge is not much easier than teaching two children who have just entered elementary school.
But the words had already been spoken, so naturally we couldn’t give up halfway, so we had to be patient and move forward bit by bit.
Half an hour later.
"That's it, after solving the two unknown numbers, it's the number of chickens and rabbits." Li Yi breathed a long sigh of relief and finally explained it to them from beginning to end, feeling quite exhausted.
It's easy to teach a naughty kid. You can fool him by just making up a story. If Li Xuan asks this kind of question again in the future, he will never do it without paying for it!
"Do you understand?" He looked at the two of them and asked expectantly.
Although the process is a bit tortuous, if they understand it, it will be a little comfort to their hearts.
"No." Li Xuan said decisively without any hesitation.
Li Mingzhu also looked puzzled.
"Two pieces of rotten wood" Li Yi sighed in his heart.
"Xiaohuan, see the guests off!"
Looking at the little maid walking to the door, Li Yi spoke decisively.
"Uncle, it's time to eat..." The little maid stood at the door and said weakly.
"No hurry, no hurry, eat first. After you finish eating, you should explain it to me a few times and you should understand." Li Xuan patted his shoulder, stood up, and looked at the little maid with a smile on his face,
