Sun Ce smiled slightly, took the pen directly, and filled in the nine numbers in turn on the nine-square grid!

"You...... How could it be so fast? Zhou Yu's eyes widened in surprise and looked at Sun Ce in disbelief, "You, have you studied the Nine Palaces before?" ”

"Let's know a little simply, in fact, there is a formula for the calculation of these nine palaces!" Sun Ce smiled slightly.

"Formula?" Zhou Yu looked at Sun Ce suspiciously, this Nine Palaces is arithmetic, but he has been studying it for a long time, and Sun Ce is actually a formula?

"That's right!" Sun Ce nodded, and slowly said the mantra that he had memorized in his heart since elementary school, "Wear nine shoes and one, three on the left and seven on the right, two or four with shoulders, eight or six for the feet, and five in the center!" ”

"Wear nine shoes and one ......" wear fingers, shoes for shoes, which is two grids up and down, left and right for three seven, two or four respectively above three seven, for the shoulder, six or eight under three seven, for the foot, and five is in the middle!

According to the formula, Zhou Yu secretly deduced it, and then arched his hand to Sun Ce: "Brother is talented, little brother admires!" ”

"In this way, since you gave me such a question, the courtesy is still exchanged, and I will also give you a question!" Sun Ce smiled slightly, and without waiting for Zhou Yu to answer anything, he wrote on the paper: "There are juvenile rabbits in the same cage, with 20 heads and 62 full, how many are there in each childcare and rabbit?" ”

That's right, this is still a primary school problem, a chicken-rabbit cage problem! In fact, in junior high school, you can solve the binary equations directly! However, there is no concept of the unknown now, and if you want to solve such a problem, you need to follow the thinking and methods of elementary school! You can imagine how difficult it is!

"This ......" looked at this question and intuitively told Zhou Yu that this question was not too difficult, so he picked up the pen and began to calculate.

However, to Zhou Yu's surprise, he solved it for a long time, but he still hasn't solved it! So he glanced at Sun Ce a little embarrassed and said that he wouldn't.

Sun Ce smiled slightly, even if he is a prodigy, there is no way! The current Zhou Yu, although smart, is only nine years old! Moreover, such a problem is common in modern times, but it is very rare in ancient times, and Zhou Yu naturally does not know the method! Sun Ce believes in Zhou Yu, he believes that if he is given enough time, Zhou Yu will definitely be able to do it!

"Actually, it's a very simple question, it's just that your mind didn't think about it!" Sun Ce smiled and explained to Zhou Yu, "Let's assume that there are a total of twenty heads, that is, there are a total of twenty animals in this cage, right?" ”

"Hmm!" Zhou Yu nodded.

"So, let's assume that these animals are all rabbits, and if we look at the legs, there should be eighty legs! Yes and no? Sun Ce continued.

"That's right!" Zhou Yu nodded again.

Sun Ce continued to explain: "So what is the difference between the sixty-two and eighteen legs in the title? ”

"It's bad to be childish! Childish only has two legs! Zhou Yu's eyes lit up, and he seemed to have understood!

"That's right, it's childish! There are only two legs, that is to say, the eighteen legs that are missing are half of the eighteen, that is, nine children! The remaining eleven are naturally rabbits! Although he knew that Zhou Yu might have come up with the answer, Sun Ce still said the answer as he spoke!

After finishing speaking, Sun Ce couldn't help but roll his eyes, why did he look like he was giving a lecture to elementary school students?

"Brother is talented! Yu can't do it! "Zhou Yu is convinced!

"Hehe, it's nothing, if you want to, I have a lot of more difficult arithmetic problems here!" Sun Ce seemed to be incarnated as a strange Shu Huang at this time, using the arithmetic problems that Zhou Yu was interested in to abduct Zhou Yu!

"Really?" Sure enough, after hearing Sun Ce's words, Zhou Yu's eyes lit up, and he hurriedly asked.

"Naturally, if you want, I can still give you a question now!" Sun Ce smiled, it seems that Zhou Yu has taken the bait!

Anyway, it's ancient times, even if it's a primary school textbook in later generations, I'm afraid it's enough for Zhou Yu to study for a while, not to mention that there are junior high school textbooks, high school textbooks, and even high school textbooks that basically more than ninety percent of students in college hate painful diseases! These questions are enough for Zhou Yu to study for several lifetimes!

However, how could Sun Ce only let Zhou Yu study these things? Zhou Yu's talent is not limited to mathematics! In history, Zhou Yu led his troops to fight, but he did not taste defeat! As for what lost to Zhuge Liang? That's just made up by Luo Dada! In fact, Zhou Yu and Zhuge Liang have never met at all in history! The Battle of Chibi is completely a drama directed by Zhou Yu, and what borrows the east wind and the grass boat borrows arrows, they are all non-existent dramas.

"Then brother, you have to teach me!" Zhou Yu interrupted Sun Ce's thoughts.

"Good! Good! Sun Ce smiled bitterly, it seems that this kid is really a math fan!

Seeing this, Zhou Yi also smiled bitterly: "Master Hou, forgive me, Gongjin has been obsessed with arithmetic since he was a child, so he ......"

"Hehe, it's okay!" Sun Ce waved his hand, "Brother Xian, I know that you have great ambitions, and I hope that you can become a handsome person who can strategize, win a decisive victory thousands of miles away, and be able to command the three armies!" ”

“？” Zhou Yu listened to Sun Ce's words, raised his head suspiciously, looked at Sun Ce's eyes, and then nodded solemnly, "Don't worry, eldest brother, I understand!" ”

"Uncle, there is a sentence that I don't know if to say or not......" Sun Ce hesitated for a long time, but still opened his mouth to say to Zhou Yi.

"There's nothing you can't say, but it's okay to say it!" Zhou Yi looked at Sun Ce's hesitant expression, and wondered in his heart, not knowing what Sun Ce meant.

"Uncle, your body is ......," Sun Ce said.

"Can you tell?" Zhou Yi was taken aback.

"Hmm!" Sun Ce nodded, although he is not a doctor, but in the army, medical treatment is something that every special soldier must dabble in, and he must also be proficient! Especially among the sharp knife troops like Sun Ce, this is even more so! Moreover, Sun Ce, who was in the previous life, also specially asked an old Chinese medicine doctor in the army to learn medical skills from him for a long time! Looking at it, Sun Ce still knows some fur!

"Actually, we all have this disease in our family!" Zhou Yi sighed and said.

"Huh?!" Sun Ce was even more puzzled, this ...... Is it a genetic disease?

"That's right, my father has also sought medical advice many times, but he has not received any effect!" Zhou Yi shook his head, "As soon as I was born, our Zhou family was like this!" ”

"Uncle, don't worry, no matter what, I will find a way to treat you and Gongjin!" Sun Ce solemnly promised. He can see that the genetic disease mentioned by Zhou Yi should be a congenital problem, probably related to cardiopulmonary function! However, although Sun Ce can see it, he can't cure it yet, after all, his time to study medicine is still too short!

Such a situation also made Sun Ce secretly make up his mind, he must find Hua Tuo and Zhang Zhongjing, the two miracle doctors, no matter what, he must cure Zhou Yu! Of course, there are also Guo Jia and Xi Zhong!