So-called:

There are pheasants and rabbits in the same cage, with thirty-five heads on top and ninety-four feet on bottom. What are the pheasants and rabbits on top?

It is one of the representative examples of ancient Celestial Empire, the famous chicken and rabbit in the same cage!

It is recorded in "Sunzi Jing Jing", and this book became a mystery when it was written.

Some say it is a pre-Qin work, some say it is after Emperor Cheng of the Eastern Han Dynasty, and some say it was written by people after the Song Dynasty under the name of their predecessors.

However, when the book was written, it has nothing to do with the time when the chicken and rabbit appeared in the same cage.

Ancient mathematics is inherited from the lineage, and it is not impossible for Du Zhong from the Western Han Dynasty to explain such problems.

But one thing is certain, that is, this problem. In Du Zhong's era, it was definitely not a simple problem that allows elementary school students to practice in later generations!

But students will find it difficult, and they will be serious mathematical knowledge!

After Du Zhong told the question of the chicken and rabbit in the same cage, Tang Qi was stunned for a second.

But it was not because of the time when the book was written.

In fact, with Tang Qi's poor historical knowledge, it is a miracle to know that chickens and rabbits are in the same cage in ancient Olympiad Mathematical Questions, and I never thought of the "Sunzi Jing"!

The reason why I am stunned is that I am really calculating.

For a modern person who has received nine years of compulsory education and has been baptized by subjects such as advanced mathematics, algebra, statistics, etc.

For questions of the same level as chickens and rabbits, mental calculation is enough!

In fact, when Du Zhong was giving the questions, Tang Qi was already in the system warehouse and opened the mathematics textbooks to help him at any time, but he didn't expect that it was such a simple problem.

But at that time, mental arithmetic was still a profound knowledge that only a few people could master.

When students who learn math skills answer questions, they all know how to use paper and pen. The teahouse shopkeeper also prepared cloth and ink for Tang Qi early.

Tang Qi was stunned.

In everyone's eyes, it seems like I'm stumped by the question!

Chu You was very anxious and couldn't help but want to give him some tips.

As soon as I got closer, my classmates stopped me. When I looked back, I found that it was Gongsun Zong, the grandson of the prime minister of the dynasty.

Gongsun Zhong hung his eyes: "I said Chu You, Dr. Andinghou is a dignified doctor, and he is very literary. He won't ask you to help cheat before he can answer, right?"

When the Prime Minister's grandson made a speech, he naturally had no legs to follow.

"Yes, Chu You, don't do bad things with kindness and underestimate our peacetime moment!"

"You are too student at least, how can you do something like cheating!"

"Even chickens and rabbits can't answer the same cage, where can I get the courage to accept Du Zhong's challenge?"

"It's a laughing stock!"

"You!" Chu You were both angry and angry, but was speechless.

When I went to see Du Zhong, I saw the man staring at Tang Qi with his eyes full of expectations, as if he was really waiting for the teacher to answer the questions.

I couldn't help but feel angry!

You are a wood, you won’t open your mouth to relieve your siege!

But he is just an ordinary family, how dare he fight against the prime minister's grandson?

I can only worry silently.

Gongsun Zong and others suppressed Chu You and waited leisurely.

I can't even write a calculation process, I just stare at the eye and stare blankly. I can tell that I'm a guy who has never learned mathematics. Now I have it!

Chu You didn't come in handy, and finally there was Du Zhong!

Next, just wait for Tang Qi to admit defeat, and he can use the excuse of being a dignified doctor but not using numerology techniques to smear Tang Qi's reputation.

Although the prepared "no learning" is no longer useful, it is not a waste of time to achieve the result of not understanding the number of numerology. This trip is not in vain, and it can still have some effect.

Next, it’s about the staff who are kept in the mansion!

Taking this as the basis point, sooner or later, Tang Qi will be forced to leave Chang'an and will never dare to enter the court again!

In Gongsun Zong's heart, countless ways to deal with Tang Qi were already flashed.

It seems like a long time, but in fact it is only four or five seconds.

Tang Qi suddenly looked up and said, "Do you have calculated it?"

"Ah?" Gongsun Zong spoke instinctively instinctively, "What did you say?"

"Think about it." Tang Qi looked at Gongsun Zong for no reason, and then smiled at Du Zhong, "There are 12 rabbits and 23 chickens in the cage, right?"

"Not bad!" Du Zhong blurted out, "Mr. I haven't written the algorithm, how did it be calculated?"

Tang Qi said for granted: "Of course it's my heart. For such a simple question, do you still need to draft it?"

mental arithmetic?!

Du Zhong was shocked: "Sir, you know how to make mental arithmetic?"

Tang Qi said: "Isn't this a basic skill? What's there to be surprised about?"

A group of students who know how to abide by their mental arithmetic: "..."

Is the times developing too fast or have problems with their ears? When will mental arithmetic be the basic skill?

Then those who don’t even know how to do basic skills are not qualified to enter the Imperial Academy!

Everyone looked at each other, their expressions were extremely wonderful.

Even Chu You couldn't help but smile bitterly while relaxing.

He doesn't know how to make up his mind!

Especially Gongsun Zhong, his face was half dark!

He felt that Tang Qi was connoting himself!

Who doesn’t know in the Imperial Academy that Gongsun Zong learned the Gongsun Family School, but his talent was mediocre, especially in mathematics, he had just opened up nine orifices.

Not to mention forgetting his mind, he didn't even enter the numerology door!

Now that Tang Qi said this, isn’t he targeting himself?!

"Andanghou, don't talk big, right?" Gongsun Zhong held back his anger and said in a strange voice, "What else do you think of mental absolution? You have read this question before, have you written down the answer?"

"Otherwise, how could the answer be calculated so quickly!"

Everyone was a little hesitant when they heard this.

Even Chu You did not refute for a while.

Even mental arithmetics cannot be considered so fast!

Du Zhong also asked hesitantly: "May I ask, can you ask the calculation process?"

Tang Qi didn't know Gongsun Zong, but he could see his bad habits. He immediately frowned and sneered, "Okay, then I'll tell you."

"Let the rabbit and the chicken lift both feet at the same time, so that the feet in the cage will reduce the total number of heads twice. Since the chicken only has two feet, there are only two feet of the rabbit in the cage, and half of it is the number of rabbits. This is a foot lifting method, is it right?"

"Yes, that's right!" Du Zhong suddenly realized, "This method is simple and clear, it's true!"

The students also made a sound.

Tang Qi's algorithm is not very novel, but it is simple and direct.

As for the so-called mathematics, the result is the simpler and more direct, the better.

Du Zhong bowed: "It is a student who judges a gentleman's ambition by his villain's heart. Please forgive me!"

"If you don't have your business, you are also being provoked." Tang Qi didn't say anything about the prime minister's belly, and he pulled the corner of his mouth to Gongsun Hong, "If you don't believe it, I have three solutions. Do you want to listen?"

"...Hmph!" Gongsun Hong was still stubborn, "No matter how many solutions you have, it only means that you can calculate it, and it cannot prove that it was calculated immediately today!"
Chapter completed!