Ruan Yu laughed and said, "Okay, I'll come up with some simple questions, don't let people say that I, Ruan Yu, is a big bully." Today, there are things that do not know their number, the remaining two of the three or three numbers, the remaining three of the five or five numbers, and the remaining two of the seven or seven numbers. ”

Liu Ze secretly breathed a sigh of relief, although Ruan Yu is arrogant and conceited, but he has real talent and learning, if he wants to take some Han Fu articles to compare with himself, but this kid was planted in arithmetic yesterday, and today he must also want to find a field from here, but he is out of sight, and he may not be able to do it compared to other Liu Ze, but in terms of arithmetic - hehe, we have also studied modern mathematics, this little pediatrics - deserves his bad luck. This problem comes from "Sun Tzu's Sutra", which was also a difficult problem in ancient times, and it could not be solved without a little deep mathematical knowledge. Liu Ze deliberately pondered for a while. Ruan Yu's face was colorful, and the other two disciples must be Gu Yong and Lu Cui - Cao Cao is also Cai Yong's disciple, but now that he has an official position, he naturally did not come - these two people had solemn faces and did not say a word.

Cai Yan said in Cai Yong's ear: "Daddy, can you tell how much a stone lion weighs about 10,000 catties?" ”

Cai Yong thought for a while, shook his head and said, "Can't-why are you asking this?" ”

Cai Yan didn't answer, staring at the spot and pursing his lips tightly.

Half a ring, Liu Ze said: "The three of them walked together seventy rare, five plum blossoms twenty-one branches, and the seven sons were reunited in the first month and a half, except for one hundred and five." Although he did not give an answer, everyone in the audience was a master of arithmetic, how could he not know that these four ballads were the solution to this problem: the first sentence refers to the remainder of dividing by 3 and multiplying it by 70; The second sentence refers to dividing the remainder by 5 and multiplying it by 21; The third sentence refers to dividing the remainder by 7 and multiplying it by 15; The fourth sentence refers to the sum of the three products multiplied above, if it exceeds 105, subtract the multiple of 105 to get the answer. That is: 70×2+21×3+15×2-105×2=23.

Everyone looked at Liu Ze in surprise, they didn't expect Liu Ze to be able to solve this mathematical problem so gorgeously, the four lines of the ballad itself are a seven-character poem, the poetry is all good, even Cai Yong can't help but praise it.

Liu Ze was calm, and said to Ruan Yu: "There is also a math problem I want to ask Brother Ruan, A and B are separated by one hundred and twenty miles, Zhang San rode a horse from A to B, Li Si sat in a sedan chair from B to A, six hours and three quarters of the two met halfway, Zhang San traveled 36 miles more than Li Si, how many miles can Zhang San and Li Si each hour be? Liu Zexin said, if there are some problems such as high mathematics, I will bully you, so I will use this most classic binary equation in junior high school to test you. In the ancient environment of emphasizing literature and ignoring reason, the difficulty of the questions in the second grade of junior high school is not small.

Sure enough, Ruan Yu opened her mouth and stammered, her face was flushed, and she was speechless for a long time, and the two senior brothers next to her were also at a loss, not knowing what to understand. Even Cai Yong frowned, only Cai Yan looked relaxed, Liu Ze was able to weigh the weight of the stone lion, and the visible number of techniques could be far above others, and it was not surprising that there was a strange question.

Ruan Yu's face was distorted in pain, but it seemed a little out of reach to solve this equation problem at his or his current level of arithmetic, and finally, he gave up and said in disgrace: "I admit defeat." It seemed to take a great deal of effort for him to utter those three words, and then his expression quickly withered, like a defeated rooster.

Liu Ze smiled and said, "Brother Ruan admitted defeat so soon?" I can give you another chance, and if someone can answer it, you'll win. ”

As soon as he said it, Liu Ze regretted it, because he saw that the faces of the people present, including Cai Yong, were cold, this sentence was too wide, and it was a bit of a bully to Cai Men.

Sure enough, when Ruan Yu heard this, her face turned gloomy, and she said hatefully: "Just a small question can deceive me, no one in Caimen, right?" In front of the master, where you can be so arrogant, I really don't know how thick the sky is! ”

Liu Ze didn't have the land to buy regret medicine now, so he had to fight back: "Then Brother Ruan knows how high and thick the sky is?" ”

Ruan Yu snorted and said, "The sky is high enough to hang the sun and the moon, and the earth is thick enough to carry mountains and rivers, how can it be powerful?" ”

Liu Ze laughed and said, "Who can't say anything? Not only the thickness of the ground can be known, but also the height of the sky. Everyone was disgraced, and Ruan Yu said disdainfully: "Then Liu Gongzi will tell everyone the results you measured." ”

Liu Ze disagreed: "The thickness of the earth is more than 48,000 miles, and the sky is divided into a broad and narrow sense, and the broad sense of the sky is the universe, endless, without beginning and no end, and the narrow sense of the sky refers to the sky with gas, where the air is located, it is outside the sky, and the sky with gas is more than 400 miles." ”

Ruan Yu snorted coldly and said, "Please also ask Liu Gongzi to tell everyone how you measured, could it be that you dug a hole of 48,000 miles and measured it out with a ruler foot by foot?" ”

Everyone couldn't help laughing, even Cai Yong couldn't help but laugh, there was only one person present who didn't laugh - Cai Yan. She is surprisingly calm, she doesn't think Liu Ze is talking about it.

Liu Ze took a spherical thing from the side and said with a smile: "Brother Ruan always knows how to measure the circumference of this circle to find out what its diameter is, right?" "Anyone who knows how to do the math knows pi, although it was only in the era of Zu Chongzhi that pi was converted to seven decimal places, but it did not prevent people in the Han Dynasty from knowing that there were three straight ones.

Ruan Yu didn't know what he meant, and said, "This is extremely simple, but what does it matter if the sky is high and the earth is thick?" ”

Liu Zedao: "Assuming that this ball is the earth, the circumference is 160,000 li, and its diameter is more than 48,000 li. ”

"What? You say the earth is a ball? It's just nonsense! The sky is round and the earth is round, and the ancients have known that they dare to allow you to blaspheme like this! Ruan Yu almost hissed and reprimanded as hard as she could, and the people next to her listened a little unexpectedly.

Liu Ze said lightly: "Is it true that what has been known in ancient times must be correct?" As early as hundreds of years ago, there was a country in the West called Greece, and there was a scholar named Archimedes in the country, who was proficient in astronomy and mathematics, and he famously said: Give me a fulcrum, and I can pry up the earth. The earth we are talking about is the earth under our feet, and one circle around the earth is 160,000 miles. On this earth, there are six continents, and our Han Dynasty, including the rest of the West and the Great Qin, are all on one continent (Eurasia is connected, and at that time there was no division between Europe and Asia), surrounded by four vast oceans. ”

Everyone listened to the story of the Arabian Nights—oh, this era is not yet heavenly—and they couldn't come back to their senses for a long time, which was also outrageous, and it was far beyond people's understanding. Ruan Yu said disdainfully: "Alarmist, sensational, and barbarian words, can they also be trusted?" If the earth were round, how could the man who was facing down survive and not fall? ”

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