Fourth grade math jokes

Three people stayed in the hotel, and each person paid 10 yuan every day, and each person paid 10 yuan, which was given to the boss 30 yuan. Later, the boss gave them a discount of 5 yuan and asked the waiter to return it to them. As a result, the waiter embezzled 2 yuan, and each of the remaining 3 yuan returned 1 yuan, which means that each person spent 9 yuan's money. Three people spent a total of 27 yuan, and 2 yuan, who was corrupted by the waiter, spent a total of 29 yuan. Where did the dollar go?

Divide apples

There are five students in Xiaomi's family Xiaomi's father wants to entertain six children with apples, but there are only five apples at home. What shall we do? I have to cut the apple, but I can't cut it into pieces. Xiaomi's father wants each apple to be cut into three pieces at most. This has become another topic: divide five apples equally among six children, and each apple is not allowed to be cut into more than three pieces.

How did Xiaomi's father do it?

Ma Xiao Hu cooked chicken

During the Spring Festival, Xiao Mahu, a professional chicken farmer, stood in the yard, counted the total number of chickens, and decided to stay and give them to the People's Liberation Army 1/2 and the nursing home 1/3. After he sent the chickens away, he heard the chickens crowing in the room, only to know that there were 10 chickens missing. So I counted the chickens inside and outside the room again, and there was nothing wrong, no more, no less, just 1/2 left. Little careless and strange. What's the problem? Do you know how many chickens Xiao Mahu counted in the yard?

How many guests came one day and Xiao Lin was washing dishes at home. Xiao Qiang saw it and asked, "Why do you wash so many bowls?" "

We have guests at home. ""How many people came? " Kobayashi said, "I haven't counted it. I only know that one of them uses a rice bowl, two people share a soup bowl, three people share a vegetable bowl and four people share a big wine bowl. A total of 15 bowls were used. "Do you know how many guests are here? A brief history of mathematics

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

Buffon's statistics show that everyone throws 22 12 times, in which the small needle intersects the parallel line on the paper 704 times, and 2210 ≈ 704 ≈ 3.142. Buffon said, "This number is an approximation of π. Every time you get an approximation of pi, the more times you throw it, the more accurate the approximation of pi is. " This is the famous Buffon Experiment.

Mathematical magician

198 1 One day in summer, India held a mental arithmetic competition. 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 wrote a long list of 20/kloc-0 bits, asking to find the 23rd root of this number. As a result, it took Shagongtana only 50 seconds to report the correct answer to the audience. In order to get the same answer, the computer must input 20,000 instructions, and then calculate, which takes much more time than Shagongtana.

This anecdote caused a sensation in the world, and Shagongtana was called a "mathematical magician".

Hua worked until the last day.

Watson was born in Jiangsu. He likes math since he was a child, and he is very clever. 1930, 19-year-old Hua went to Tsinghua University to study. During his four years in Tsinghua, under the guidance of Professor Xiong Qinglai, Hua studied hard and published more than a dozen papers in succession. Later, he was sent to study in Britain and got 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 20 provinces, municipalities and autonomous regions to mobilize the masses to apply the optimization method to agricultural production.

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

Without thinking, he replied, "Work until the last day." On the last day of working hard for science, he really fulfilled his promise.

Seven mathematical problems in 2 1 century

On May 24, 2000, the Clay Institute of Mathematics in the United States announced the results of many mathematicians' selection: each of the seven "Millennium Mathematical Problems" was awarded one million dollars.

Since the publication of the "Millennium Prize", it has had a strong response in the field of mathematics. These problems are all about the basic theory of mathematics, but the solution of these problems will greatly promote the development and application of mathematical theory. Understanding and studying the "Millennium Prize" has become a hot spot in mathematics. Mathematicians in many countries are organizing joint research. It can be expected that the "Millennium Prize Problem" will change the historical process of mathematics development in the new century.