The people downstairs in Xianju looked at Yang Fan as if they were looking at a fool. The woman under the tree also burst into tears of hatred and laughter. No one believed that what Yang Fan had filled out casually was correct. Some of the scholars downstairs clasped their hands and looked at Yang Fan with a sneer.

Liu Qi said with a smile: "Is this brother Tai representing the younger generation of arithmetic in the capital to challenge him?" ”

"It's not. Any questions? ”

"It's good that it's not, otherwise if you mess around like this, you will lose the face of your capital arithmetic." Liu Qi said.

Yang Fan raised his eyebrows, is such a primary school student really looking for death? Flicked the proclamation with his finger and said, "I can see clearly what I am saying." No vision. ”

"Hmph, do you think it's right to just slant like this, it's a joke. It's not like wanting to be slapped in the face. If you count any line, you can know how wrong you are......"

The man was amazed and said, "The first row is really a total of three hundred and sixty-nine!" It must be a coincidence. ”

"It must be a coincidence, right?"

"Second row, three hundred and sixty...... Nine! ”

"Third...... Row...... Three hundred and sixty ...... Nine! ”

Anyone with a modicum of common sense knows that in order to be equal, the sum of each row and column must be three hundred and sixty-nine.

At this time, everyone began to look at the ninety-nine square grid filled by Yang Fan on the upper floor of the Immortal Residence.

"First column, three hundred and sixty-nine."

"The second column, also three hundred and sixty-nine!"

……

"My God, the ninth column is also three hundred and sixty-nine!"

"Nine rows and nine columns are all three hundred and sixty-nine!" Everyone was stunned. I didn't expect Yang Fan to really be able to complete this nine-nine square grid.

Liu Qi was so shocked that the fan fell to the ground, "Impossible, how could it be solved all at once?" That's right, diagonal, diagonal is bound to go wrong! ”

"Three hundred and sixty-nine! It's still three hundred and sixty-nine! ”

"Oh my God, this ...... How is this possible. It was unexpectedly solved by this kid casually written like this? I don't believe it, I'm going to do it again. ”

"Yes, it's all right." Everyone looked at Yang Fan like a monster, and they all wanted to ask, how did you do it.

Yang Fan said with a smile: "The magic square has been there as early as the Three Emperors and Five Emperors. Yang Hui, an arithmetic scholar in the Southern Song Dynasty, has solved the magic square of three to ten in his "Algorithm of Continuing the Ancient Extracting Hall". Is this kind of little trick worth showing off? ”

I have to say that the arithmetic research in ancient China was also brilliant for a while, Zhang Heng, Qin Jiushao, and Zu Chongzhi ...... It's a pity that since the Han Emperor deposed the hundred schools of thought and respected Confucianism, the development of arithmetic has been hindered. Many classic books of arithmetic and astronomy were discarded and left unread. What is so difficult about a ninth-order magic square like this, but it has stumped all the arithmetic scholars in the capital, this is the sorrow of an era!

Liu Qi was shocked, that Yang Hui's "Algorithm of Continuing the Ancient Extraction Hall" has always been a treasure in their family, and he would learn about it from this kid's mouth, which could not surprise him.

"You...... Are you telling the truth? A good arithmetic scholar in the capital asked.

Yang Fan smiled: "You can ask this Liu Qi son." ”

Liu Qi, who was standing on the side, had a somewhat ugly face, and did not answer positively, and said: "It seems that Brother Yang is also a master of arithmetic, so Brother Yang will also solve the two questions in the back of the next one." ”

Yang Fan smiled and unveiled the announcement, this time it was a text. "There is a cage today, and there are a number of chickens and rabbits, with twenty-nine heads and ninety and six feet below, and ask how many chickens and rabbits there are."

Yang Fan secretly slandered to himself, isn't this just a chicken and rabbit in the same cage, he looked at Liu Qi's eyes like he saw a primary school student showing off to himself with the Olympiad, and said: "Ten chickens, nineteen rabbits." Right? ”

"This ......"

Yang Fan turned directly to the next page, the problem of cows eating grass, I will go, it is another elementary school Olympiad problem, Yang Fan picked up the pen, calculated it directly on the top, and immediately came up with the answer. He can see that this so-called arithmetic, compared with ancient times, has not made any progress at all. There is no way, if the imperial examination does not take this test, the scholars will naturally not study this. In this way, arithmetic, which has been superficial in the entire history of the development of the Chinese nation, has had a brilliant beginning, but it has become lonely.

The woman under the tree opened her mouth in surprise, he didn't expect that this disciple would directly solve the three questions of Jiangdong arithmetic Liu Qi. Somewhat bewildered, he stomped his foot, turned and walked away.

Yang Fan saw the back of the woman leaving, and smiled helplessly.

The one with an even more ugly face was Liu Qi, who thought he could stump a piece of scholars in the capital, and Yang Fan solved them one by one in a little effort, and on the contrary, he turned it into a joke, and threw the paper in his hand angrily with a blushing face.

"It's just a little trick, arithmetic is the last way, what's so strange." There was a very discordant sound from the crowd.

Yang Fan squinted and said, "There are only some small tricks in the next place, it's just that the class has an axe." But this is considered to be applied by the world, how did it become the end of the road in the mouth of the brother? ”

"Hmph, the world is getting worse now. You don't read the books of the sages, but you are playing tricks here, which is insulting! ”

"Fang Yiru, how are we calculating, we don't need you to evaluate it, right?" The arithmetic scholar who was studying Yang Fan's exquisite solution to the problem on the side glanced at the scholar with disgust.

Yang Fan said with a smile: "This Brother Fangtai, since you said that this is the last way to learn, you come up, let's argue, if you lose, how about the ten-day banquet of this Xianju Building to you?" ”

"The way of the sages to govern the world, pay attention to self-cultivation, Qi family, rule the country and level the world. How would someone of ours sweep the floor for a meal? ”

Yang Fan said: "Since Brother Fang doesn't want to be on the same stage as me, he doesn't force it." I have always been confused, can I ask Brother Fang for advice? ”

"But it doesn't hurt to say that. In the next knowing, there is no end to words. ”

"If there is turmoil today, and the people can't eat their stomachs, since Brother Tai said that the sages rule the world is so effective, why are the people's livelihoods sluggish and hungry?"

"Bold! The way of Confucius and Mencius, sung through the ages, can be questioned? It is precisely because some kings do not promote Confucianism and Taoism and are extravagant that they will cause civil disasters and the world will be in turmoil. At this time, it is all the more necessary for us to stand up and revive Confucianism and Taoism, and solve problems for the saints. ”

Bang Bang Bang!

Yang Fan applauded.

"It's a good solution. Brother Fang is really righteous and awe-inspiring. The younger brother went out today, bought five and a half halves of bean halva, halva three pennies a city tael, the younger brother did not have idle copper money in hand, so he gave the old woman who sold halva a penny of silver. The old woman asked me for eighty copper coins. Dare to ask Brother Fang, is this account correct? ”

Fang Yiru said: "The halva has a total of sixteen and a half copper coins, and the old woman should have returned eighty-three and a half dollars, if Brother Tai is generous, if he doesn't want that half of the money, he will also return eighty-three dollars, and Brother Tai has obviously suffered a small loss." ”