Urgent! ! Math!

One day, the French mathematician Pu Feng invited many friends to his home to do an experiment. Buffon spread a big white paper on the table, which was covered with parallel lines with equal distance. He also took out many small needles with equal length, all of which were half the length of parallel lines. Buffon said, "Please leave these small needles on this white paper casually!" The guests did as he said.

Buffon's statistical result is: everyone throws 2212 times, of which the small needle intersects the parallel line on the paper 74 times, and 221÷74≈3.142. Buffon said, "This number is an approximation of π. Every time you get an approximate value of pi, and the more times you throw it, the more accurate the approximate value of pi is. " This is the famous "Buffon Experiment".

Mathematical Magician

On a summer day in p>1981, a mental arithmetic contest was held in India. The performer is a 37-year-old woman from India. Her name is Shagongtana. On that day, she will compete with an advanced electronic computer with amazing mental arithmetic ability.

The staff writes a large number of 21 bits, and asks to find the 23rd root of this number. As a result, it took Shagongtana only 5 seconds to report the correct answer to the audience. In order to get the same answer, the computer must input 2 thousand instructions and then calculate, which takes much more time than Shagongtana.

This anecdote caused a sensation in the world, and Shagongtana was called "Mathematical Magician".

Hua Luogeng, who worked until the last day

Hua Luogeng was born in Jiangsu Province. He liked mathematics since childhood and was very smart. In 193, at the age of 19, Hua Luogeng went to Tsinghua University to study. During his four years in Tsinghua, under the guidance of Professor Xiong Qinglai, Hua Luogeng studied hard and published more than a dozen papers in a row. Later, he was sent to study in the UK and obtained a doctorate. He studied number theory deeply and got the famous Fahrenheit theorem. He paid special attention to integrating theory with practice and traveled to more than 2 provinces, municipalities and autonomous regions to mobilize the masses to apply the optimization method to agricultural production.

The reporter asked him in an interview: "What is your greatest wish?"

without thinking, he replied, "I worked until the last day." He really fulfilled his promise on the last day of hard work for science.

◆ The story of pi

1. Zu Chongzhi, ranked seventh, ranked first in the world, maintained for a thousand years; "The accuracy of pi calculated by a country in history can be used as a sign to measure the level of mathematical development in that country at that time" < P > 2.1427, Arabian mathematician Al Cassie, 16th;

In p>1596, the Dutch mathematician Rudolf, 35;

in p>199, there were 48 million computers;

December 6, 22, Tokyo University, with 1,241.1 billion students.

◆ ""

Roman numerals do not have ;

In the 5th century, "" spread to Rome from the East. At that time, the Pope was very conservative, thinking that Roman numerals could be used to remember any number. When it was enough, it was forbidden to use "". A Roman scholar's handbook introduced some uses of and , and the Pope tortured it after discovering it.

Fiona Fang with "rules" and "moments"

In a stone statue of an ancient building in Jiaxiang County, Shandong Province, there are two images of our ancient ancestors in ancient deification, one is Fuxi and the other is Nu Wa. The object in Fuxi's hand is a compass, similar to a compass; The object in Nuwa's hand is called a moment, which is in the shape of a right-angled ruler.

interesting math story

The situation is very tight in the kingdom of true scores and false scores.

The cause of the incident is this: A group of true scores and false scores joked: "We all look like kings, with a small upper body and a big lower body, and we are real scores, while you fake scores, with false words in their names, actually don't look like kings, and our upper bodies are big." So you must be false scores. "Unexpectedly, this joke angered the false scores. They rallied and quickly occupied the west of the capital, fighting to the death with the true score, but the true score did not show weakness, guarding the east of the capital and preparing for the battle. The two sides were at loggerheads and civil war was imminent.

This naturally alarmed the king of the score kingdom. He told the ministers around him to say," Go and check quickly. After that, he set off for mediation. He rushed to the east and west of the capital respectively, and patiently persuaded the true score and false score: "You are all subjects of the score kingdom, and live in harmony from generation to generation. Today, just for a joke, you will meet with each other, and you will regret it in the future."

The minister who went to check the history books hurried to the east and west of the capital and told everyone the results that the score king asked him to check. The minister said: "According to historical records, the minister said. It is to divide a unit into several parts on average, and the number representing such a part or parts is called a fraction. The numerator can be smaller than the denominator, larger than the denominator, or equal to the denominator. If it is larger than the denominator, it can be converted into an integer and a fraction. If the numerator is equal to the denominator, it can be converted into an integer. For the sake of distinction, Mathematically, this kind of score is called false score. False score is also a score. "

False score jumps and jumps with joy after listening to the minister's words.

The true score retorts," Now, integers can also be turned into scores with a denominator of 1. "

The minister said," Yes, I have another more important discovery. It turns out that integers, fractions and decimals are all called rational numbers. The characteristic of rational numbers is that they can be written in the form of the ratio of two integers. However, some rational numbers recorded in history books are unknown to us. For example, we have never seen negative fractions. "At this moment, the true and false fractions came together, and they held hands and said," Let's visit those rational brothers who haven't met yet! " They want to set up a rational number kingdom after visiting all kinds of rational numbers!

is that enough? if not, I'll find it for you.