Xing Hong's footsteps immediately stopped, and his face, which had turned blue and purple from the anger just now, slowly reddened, and a pair of fire-breathing eyes suddenly shone brightly.

He never expected that what Zhou Zhi said just now was not bad at all, and it was the answer to the arithmetic problem he came up with.

He turned his head in surprise, staring at Zhou Zhi stupidly, as if he had discovered a new continent, shocked, delighted, and even more puzzled.

I didn't expect that there would be such a quick thinking in this country's prison, no, it was a person who turned his brain so quickly and was so good at arithmetic.

It's still not right, I heard Guo Xun say it just now, he is a newcomer, and he is also a poor sour talent in the countryside. It is even more unbelievable that a countryman, a person from a small place, can say the answer so quickly.

In fact, when Zhou Zhi said the answer loudly, among these many students, some people silently wrote down the number that Zhou Zhi said, and quickly added it together, it was exactly three hundred and eighty-one. This undoubtedly shows that Zhou Zhi is the correct answer.

Especially the foreigners, one of them was a Persian named Said. This guy is only in his thirties, but he has been to many places, such as Spain, Italy, etc. He has a wide range of hobbies, especially arithmetic. For example, today's question from Mr. Xing Hong, after careful calculation, he can come up with the correct answer. It just takes a little longer, maybe a few hours, or a day or two.

Said quickly exclaimed, "Sir, his answer just now is correct!" ”

His Middle-earth dialect was not fluent, but his words were clear, but he stumbled a little. His voice made all the students look at Zhou Zhi in unison.

Especially Guo Xun, he almost didn't believe his ears, he had already stood up, looked at Zhou Zhi a few times, and yelled at Said, "You foreign barbarian, you don't have to talk nonsense, how can he be right, Mr. just said a long time ago, he will not pass the exam next month, and from now on, Mr. will not want him to listen to Mr.'s lectures!" ”

Said blinked his big blue eyes and said word by word, "But what he said is right!" ”

Xing Hong turned a deaf ear to the clamor of the students below, and quickly walked up to Zhou Zhi and asked in a deep voice, "Tell me, how did you calculate it, how did you calculate it so fast?" ”

Zhou Zhi immediately picked up the brush and wrote the equation on the paper. The equation written by Zhou Zhi is completely based on modern column equation techniques, and the lamp on the seventh floor is Aix.

In this equation, Arabic numerals appear.

Arabic numerals were invented by the Indian scientist Baghdad in the third century. After the Arabs established the Saracen Empire, which included India, these numbers became known as Arabic numerals. It then spread to Spain and all of Europe.

Arabic numerals were introduced to Middle-earth in the thirteenth or fourteenth century. It's just that at that time, Daming had a special counting method, which was called "chips". "Chips" are actually very simple, so the Arabic numerals have not yet spread in the Ming Dynasty at this time, and few people know about them.

Xing Hong, as a wizard of arithmetic, naturally knew these Arabic numerals. However, he still couldn't read what Zhou Zhi wrote about Aix. For a while, he held the paper of Zhou Zhi's list of calculations in both hands, frowning and pondering, puzzled.

Said was a very bold man, and because he had a great interest in arithmetic, he ran to Zhou Zhi's side from behind, stood beside Xing Hong, and carefully looked at the equations listed by Zhou Zhi.

He was naturally familiar with the English alphabet, and after a little pondering, he suddenly became enlightened, and exclaimed, "Sir, his method is so concise, why can't we think of such a good method?" ”

Hehe! In such an era, to be able to understand the well-thought-out equation and understand the reasons for it, I have to say that this Saeed is a very remarkable person.

In later generations, Zhou Zhi did not know much about the history of the world, especially the development of mathematics, and he was not amazed at this time.

The people of this era are actually very smart, but they have less knowledge than later generations, and their horizons are narrow, so they naturally do not have the achievements of later generations.

Xing Hong thought hard for a long time, but still under Said's spitting and pointing speech, he understood the arithmetic in a trance. I couldn't help but cast a very appreciative gaze at Zhou Zhi.

"Hmmm! This algorithm is good! I have one more question, see if you can solve it this way? Xing Hong said immediately.

After that, he had another problem of chickens and rabbits in the same cage.

Such a question is thoughtful, and the equation is listed without thinking, and the solution is smoothly solved.

Xing Hong stood for a long time before asking, "How did you come up with this method?" ”

Hehe! It's really hard to answer such a question, you can't say that you have traveled from the afterlife, right? The word "crossing" has not yet appeared, and no one has ever encountered this phenomenon. Explaining to them like this will cost you a lot of tongue and even cause trouble.

In fact, Zhou Zhi traveled to this era, and there were many times when he used modern knowledge or methods, as long as he didn't pay attention to it, he would encounter such trouble, which suddenly gave Zhou Zhi a headache.

In this way, this is also a kind of sadness of traversing!

Fortunately, in this era, feudal superstition is rampant, and Zhou Zhi said casually, "This is all my dream." ”

The crowd was dumbfounded.

Liu Long, who was sitting in the back, was even more dumbfounded, envious, the secret way was too unfair. God is really too caring, he can even dream such a beautiful dream.

Where is the reason?

That Guo Xun was also a little dumbfounded at this time, he was dumbfounded not because he saw Zhou Zhineng solve the question, but because he felt that his face was dull.

Fuck it! This time, he was undoubtedly slapped in the face by Zhou Zhi, a poor country man? In front of so many people, I just brought humiliation on myself. Yes! Zhou Zhi, you wait, I Guo Xun must find this field today.

What made Guo Xun even more unacceptable was that Xing Hong suddenly said, "I said just now that you can't pass the exam next month, and I will take it back." Not only will you pass, but you'll be the best.

I've heard Lord Zhuge talk about you, the article is not very good, and you haven't read enough books. In the future, you can come and listen to my lectures, or you may not come! ”

From Xing Hong's words, it is not difficult to see that he is still an extreme person. However, this is also the highest evaluation and reward for Zhou Zhi. After all, in the eyes of most people, learning arithmetic is tantamount to a waste of effort, and it has nothing to do with the imperial examination.

Zhou Zhi immediately thanked Xing Hong happily. Although Xing Hong teaches very hard and is also very accomplished in arithmetic, for Zhou Zhi, a traverser, what he teaches is indeed pediatrics.

An afternoon of class went by.

In the following days, Zhou Zhi studied in Yilun Hall every day in addition to listening to the gentlemen's classes, and began his hard-working career as a Guozijian student.