Datang: The prince of salted fish was overheard by Li Er

Before that, Wang Xiaotong was secretly sad that he couldn't do anything for the students.

After hearing what Li You said about the competition, he immediately became interested.

He has studied for many years and has absolute confidence in himself, but when he was about to agree, he turned his head to look at a group of students, and then turned to Li You and said, "King Chu, I can bet with you on my own behalf. But I can't speak for them! Whether they want to, that's their business."

Hearing this, Li You secretly praised Wang Xiaotong in his heart.

Under such circumstances, he can calmly distinguish the situation, which shows that Wang Xiaotong cares for the students from the bottom of his heart.

This kind of sincere care is exchanged for the sincerity of the students.

The students in the examination room unanimously agreed to Li You's bet.

After the bet is completed, it will naturally enter the link of the question.

For the first question, Wang Xiaotong came out first.

Wang Xiaotong thought for a while and said: "Today there are chickens and rabbits in the same cage, with 35 heads on the top and 94 feet on the bottom. How about the chickens and rabbits?"

Hearing this question, Li You suddenly laughed.

[Isn't this just the problem of chickens and rabbits in the same cage? Elementary school students also want to pass me! 】

For this answer, Li You opened his mouth and said, "Twelve rabbits, 23 chickens!"

Wang Xiaotong was also taken aback for a moment, but then he thought that this was the original question in "Sun Tzu's Mathematical Classics", so to use the level of the question just now, it is very likely that he has read this Mathematical Classics.

The more Wang Xiaotong thought about it, the more he felt it was possible, and finally decided to give him a try, so he continued to ask: "King Chu, math problems are more about methods than conclusions."

"Can you tell me more about the method you use to solve the problem?"

Li You smiled slightly and said, "What's so difficult about it, the process is also very simple."

"I don't know if Dr. Wang has seen the golden rooster independent?"

Wang Xiaotong didn't understand why Li You asked this question, but he nodded and said, "I've seen it, it's just standing on the ground with one foot."

"Yeah, Dr. Wang is really knowledgeable, have you ever seen a rabbit stand up on two hind legs?"

Li You then asked.

Wang Xiaotong thought about it carefully and nodded, "When feeding the rabbit, sometimes the food is placed too high, and the rabbit will indeed stand on its two hind legs to eat the food."

"Yeah, that's it." Li You clapped his hands happily and said, "That's what Dr. Wang said. The doctor of the Imperial College really knows everything."

Li You's few words made Wang Xiaotong's face burn a little, but he was even more puzzled in his heart. He didn't know what the golden rooster's independence had to do with the rabbit standing up and calculating the problem.

But soon, Li You answered his doubts.

"Then the problem is simple. I let all the chickens stand alone and all the rabbits stand up, so that there are only 47 legs on the ground."

"A chicken has one leg, a rabbit has two legs."

"At this time, I let the chick jump up and jump on the rabbit's back, and then the rabbit raised one foot again, learning how the chick golden rooster is independent."

"In this way, there are only twelve legs on the ground, all of which belong to rabbits."

"So there are twelve rabbits."

"If you know rabbits, you will naturally know the number of chickens."

"Dr. Wang, is there something wrong with my solution?"

Li You's explanation was that the golden rooster was independent and jumped on its back, which made Kong Yingda and others at the side hear nothing but mist.

But these words have another meaning in Wang Xiaotong's ears.

Li You's solution may seem absurd, but there is no problem at all.

It cannot be said that it is similar to the one in the book, but in essence, it is exactly the same.

Seeing that Wang Xiaotong was silent, Li You spoke again.

"Actually, this is not the easiest way. The easiest way is to blow a whistle and let the chicken and the rabbit lift a leg."

"That leaves 59 legs on the ground."

"Then blow the whistle again and tell them to lift one more leg, so there are 24 more legs underground."

"These chickens are two legs off the ground, they must all fall to the ground, and the rabbit still has two legs standing."

"So the remaining 24 legs belong to twelve rabbits."

"This is much easier than the golden rooster just now, but how to train the rabbit and the chicken to lift their feet obediently is a big problem."

After finishing speaking, a trace of regret appeared on Li You's face.

This time, even Kong Yingda understood Li You's solution.

"Hey, this is the time to worry about the difficulty of training legs. Could it be that someone can do what you said just now that all the chickens are independent!"

Although Kong Yingda complained in his heart, he was still secretly surprised that Li You could find such a simple and clear method to solve the problem.

Then Kong Yingda turned his head to Wang Xiaotong, he wanted to see what Dr. Wang, who claimed to be proficient in arithmetic, had to say this time.

At this time, Wang Xiaotong also had an expression of embarrassment and shock on his face.

This time, he felt that Li You's seemingly absurd way of solving the problem was simpler, more direct, and even more ingenious than the way of thinking in the algebra.

"Well, children are familiar with chickens and rabbits, so they can come up with such an incredible solution."

"This time it must be his luck. See if I change to a problem he has never been exposed to."

Wang Xiaotong kept cheering himself up in his heart, and then said: "The algorithm of the king of Chu really opened my eyes."

"This question, even if you are right, then please listen to the next question."

Li You smiled and nodded, indicating that he could continue.

However, Kong Yingda on the side didn't do it. He said, "Dr. Wang, it's fair for each person to ask three questions."

Wang Xiaotong blushed a little, nodded and said to Li You: "I was too impatient just now, King Chu, please come up with the first question."

In fact, Li You's original idea was to ask Wang Xiaotong to ask three questions first, and after he had answered them perfectly, he would counterattack with one question.

But he didn't want Kong Yingda's heart towards him, but it was self-defeating.

But Li You never really cared about people who were good to him, he also wanted to see Wang Xiaotong's ability first.

Then Li You said: "Then the king will come up with the question."

"Dr. Wang asked a question about chickens and rabbits just now, so I will ask a question about fishing."

"There was a fisherman wearing a straw hat fishing on the river, and the speed of the river was three miles per hour."

"The fisherman felt that there were too few fish downstream, so he rowed upstream. However, a gust of wind blew the fisherman's straw hat into the river."

"But the fisherman didn't notice it until he rowed five miles up."

"So he immediately turned around and finally caught up with the hat."

"A fisherman can row ten miles per hour in calm water, assuming he can maintain this speed both upstream and downstream."

"Of course, this is not his speed relative to the river bank. After considering the speed of the water, his speed downstream is thirteen miles per hour, while upstream is seven miles."

"If the time when the fisherman's straw hat was lost was at three o'clock in the morning, then what time did Dr. Wang find the straw hat?"