So-called:

Today there are pheasants and rabbits in the same cage, there are thirty-five heads on the top, and there are ninety-four feet under it.

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

It is recorded in the "Sun Tzu Sutra", which became a mystery when this book was written.

Some say that it was written by the pre-Qin Dynasty, some say that it was after the Eastern Han Dynasty became emperor, and some say that it was written by people after the Song Dynasty in the name of their predecessors.

However, when the book was written, it has no absolute relationship with the age of the appearance of chickens and rabbits in the same cage.

Ancient mathematics is in the same lineage, and it is not impossible for Du Zhong in the Western Han Dynasty to be able to say such problems.

It's just one thing for sure, that is, this problem, in Du Zhong's era, is definitely not the kind of simple problem that primary school students practice in later generations!

But too students will also find it difficult, serious math knowledge!

After Du Zhong said the problem of chickens and rabbits in the same cage, Tang Qi was stunned for a second.

But it's not because of the age of the book.

In fact, with Tang Qi's poor historical knowledge, it is a miracle to know that chickens and rabbits are in the same cage is an ancient Olympiad topic, and he doesn't think of "Sun Tzu's Sutra" at all!

The reason why I was stunned was that I was really calculating.

For a modern person who has received nine years of compulsory education and has seriously experienced the baptism of advanced mathematics, algebra, statistics and other subjects.

For a problem of this level of chickens and rabbits in the same cage, mental arithmetic is enough!

In fact, when Du Zhong came up with the problem, Tang Qi was already in the system warehouse, opening the math textbook and preparing to save his life at any time, but he didn't expect it to be such a simple problem.

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

When students who study mathematics, they all know how to use paper and pen when answering questions, and the shopkeeper of the teahouse also prepared cloth and pen and ink for Tang Qi early.

Tang Qi was stunned.

In the eyes of everyone, it is as if I am stumped by the topic!

Chu You was very anxious and couldn't help but want to give a hint.

As soon as he got closer, he was stopped by his classmates, and when he looked back, he saw that it was the grandson of the prime minister of the dynasty.

Gongsun Chong hung his eyes: "I said Chu You, Dr. Stable Houtang, he is brilliant, he won't ask you to help cheat in order to answer, right?" ”

The prime minister's grandson spoke, and naturally there were dog legs to follow.

"Yes, Chu You, don't do bad things with good intentions, underestimate our stability!"

"You're too much of a student, how can you do such a thing as cheating!"

"I can't even answer the problem of chickens and rabbits in the same cage, where did I get the courage to accept Du Zhong's challenge?"

"It's just ridiculous!"

"You guys!" Chu You was angry and angry, but he was dumbfounded.

went to see Du Zhong, but saw that he was staring at Tang Qi, his eyes were full of expectation, as if he was really waiting for a good student who was really waiting for the teacher to answer questions.

I can't help but be half angry!

If you're a woodman, you won't open your mouth to solve the siege!

But he is just a side of an ordinary family, how dare he do it against the grandson of the prime minister?

I can only worry silently.

Gongsun Chong and the others suppressed Chu You and waited for a long time.

I can't even write an operation process.,Just stare in a daze.,At first glance, it's a guy who hasn't learned math.,Now there's it!

Chu You didn't come in handy, there is finally a Du Zhong!

Next, just wait for Tang Qi to admit defeat, and then he can use the excuse that the dignified doctor does not know how to do math to smear Tang Qi's reputation.

Although the prepared "no learning and no skills" can not be used, but if you can have a result of not knowing the number of techniques, this trip is not in vain, and it can still have some effect.

Next, it's about the staff members raised in the house!

Based on this, sooner or later, Tang Qi will be forced to leave Chang'an, and he will never dare to enter the court in the future!

In Gongsun Chong's heart, countless ways to deal with Tang Qi had flashed.

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

Tang Qi suddenly raised his head: "Forget it?" ”

"Huh?" It was Gongsun Chong who spoke out, and he instinctively opened his mouth in surprise, "What did you say?!" ”

"Forget it." Tang Qi glanced at Gongsun Chong inexplicably, and then smiled at Du Zhong, "There are 12 rabbits and 23 chickens in the cage, right?" ”

"Not bad!" Du Zhong blurted out, "Mr. didn't write out the algorithm, how did he calculate it?" ”

Tang Qi said as a matter of course: "Of course it's mental arithmetic, is it still necessary to make a draft for such a simple question?" ”

Mental arithmetic?!

Du Zhong was shocked: "Mr. actually knows mental arithmetic?!" ”

Tang Qi said: "Isn't this a basic skill, what's there to be surprised about." ”

A group of students who don't know mental arithmetic: "......"

Is it that the times are moving too fast or that there is something wrong with their ears, when is mental arithmetic also a basic skill!?

Then those of them who don't even know the basic skills are not qualified to enter Taixue at all!

Everyone looked at each other, and their expressions were extremely exciting.

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

He won't be able to do the math!

Especially the Gongsun species, his face is half blackened!

He felt that Tang Qi was connotating himself!

Who in Taixue doesn't know that his grandson is learning from the Gongsun family, but his talent is mediocre, especially in mathematics, he is simply nine out of ten.

Not to mention mental arithmetic, he didn't even enter the door of arithmetic!

Now that Tang Qi says this, isn't he targeting himself?!

"Settle down, don't you talk big, right?" Gongsun Chong endured his anger and said in a strange voice, "What else do you say mental arithmetic, you have simply read this question before and memorized the answer, right?" ”

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

Everyone was also a little hesitant when they heard this.

Even Chu You didn't refute it for a while.

Even if it's mental arithmetic, it's really impossible to calculate it so fast!

Du Zhong also hesitated to ask: "Dare to ask Mr., can you ask me about the calculation process?" ”

Tang Qi didn't know Gongsun Chong, but he could also see that he was not good, so 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 total number of feet in the cage is reduced by two times, since the chicken has only 2 legs, so there are only two feet left in the cage, and then half is the number of rabbits. This is a foot lift, right? ”

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

The students also made a sound.

Donkey's algorithm isn't very new, but it's simple and straightforward.

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

Du Zhong arched his hand: "It is a student who spends the belly of a gentleman with the heart of a villain, please forgive me!" ”

"It's none of your business, you're also being provoked." Tang Qi didn't talk about what the prime minister could hold the boat in his belly, and pulled the corners of his mouth and said to Gongsun Hong, "If you still don't believe it, this official still has three solutions, do you want to listen to it?" ”

“…… Hum! Gongsun Hong still stiffened his mouth, "Even if you have more solutions, it can only mean that you can calculate, not prove that it is calculated by today's instant!" ”

"Maybe Master Hou happened to have learned, but he just picked up people's teeth!"