Only 1% of people in the population have an IQ above 140; IQ points range from 120 to 13911%; 18% belongs to1/kloc-0 ~119; 46% belong to 90 points ~ 109 points; 15% belongs to 80 ~ 89 points; 6% belongs to 70 ~ 79 points; In addition, 3% of people have an IQ below 70, which means they are mentally retarded. What is your IQ? Let's solve a problem first.
The most difficult math problem in the world.
The big uncle went to the second uncle's house to find the third uncle, saying that the fourth uncle was cheated by the fifth uncle to steal the seventh uncle's house and put it in the eighth uncle's cupboard. Uncle Jiu borrowed 1000 yuan to pay uncle Ten and uncle Eleven. Q: 1. Who is the thief? Whose money was it?
Let's take a look at the answers from netizens.
Success: the thief is the fourth uncle, and the money belongs to the tenth uncle.
Cn#BQGfLuLapQ: Six is a thief, and the money is 99?
Don't underestimate the small rate: the fourth is stealing, and money is nine.
1 spill over the whole country 0: Fourth Uncle is a thief and Eleventh Uncle's money.
A black cat is like milk: the fourth uncle is a thief, and the money was originally lent by the ninth uncle to the tenth uncle
Seeing that so many people can't give a clear answer, do you feel that your IQ has dropped? The following is the most difficult math problem in the world that is widely rumored on the Internet.
Online transmission of the most difficult mathematical problem in the world
First, its title is like this
Albertz and Bernade wanted to know Cheryl's birthday, so Cheryl gave them ten possible dates: May 15, May 16, May 19, June 17, June 18 and July/Kloc. Cheryl only told alberts her birthday and Bernade her birthday. Albertz said: I don't know Cheryl's birthday, but I know Bernade won't know either. Bernade replied: I didn't know Cheryl's birthday at first, but now I do. Alberts also replied: Then I know. When is Cheryl's birthday?
Second, its answer is this.
In these ten days, only 18 and 19 appeared once. If Cheryl's birthday is 18 or 19, Bernade who knows the date can guess the month and must know when Cheryl's birthday is. Why is albertz sure Bernade doesn't know Cheryl's birthday? As mentioned above, since May and June both have dates of 18 and 19, albertz who knows the month can judge whether Bernade is sure, so her birthday must be July or August. Bernade's words also provided information, because in the remaining five days in July and August, only 14 appeared twice. If Cheryl tells Bernade that her birthday is 14, then Bernade can't guess her birthday by albertz's words. So the only possible dates are July 16, August 15 and August 17. After Bernade's speech, albertz also knew Cheryl's birthday, reflecting that Cheryl's birthday month can't be in August, because there are two possible days in August and only one in July. So the answer is July 16.
The most difficult mathematical problem in the real world
What is the most difficult math problem in the world? 1+ 1? Don't laugh and don't think I'm lying to you. Actually, it's true. No one has been able to solve this problem since ancient times.
Goldbach conjecture: 1742 On June 7th, German amateur mathematician Goldbach wrote to the great mathematician Euler at that time, and put forward the following conjecture:
(a) Any even number of n 6 can be expressed as the sum of two odd prime numbers.
(b) Any odd number of n 9 can be expressed as the sum of three odd prime numbers.
This is the famous Goldbach conjecture. Since Fermat put forward this conjecture, many mathematicians have been trying to conquer it, but they have not succeeded. Of course, some people have done some specific verification work, such as:
6 = 3+3,8 = 3+5, 10 = 5+5 = 3+7, 12 = 5+7, 14 = 7+7 = 3+ 1 1,65438.
Someone is right about 33? Goldbach conjecture (a) is valid when it is within 108 and greater than even number 6. However, the mathematical proof of lattice test needs the efforts of mathematicians. At present, the best result is proved by China mathematician Chen Jingrun in 1966, which is called Chen Theorem (Chen? S theorem)? Any large enough even number is the sum of a prime number and a natural number, while the latter is only the product of two prime numbers. This result is usually referred to simply as the big even number. 1 + 2 ? The form of.
Before Chen Jingrun, even numbers can be expressed as the sum of the products of S prime numbers and T prime numbers (referred to as? s + t？ The progress of the problem is as follows:
1920 Norway's Braun proved it? 9 + 9 ? .
1924 Rademacher proved that? 7 + 7 ? .
1932, Esterman of England proved? 6 + 6 ? .
1937, Italy's Ricei successively proved? 5 + 7 ? ,? 4 + 9 ? ,? 3 + 15 ? And then what? 2 + 366 ? .
1938, Byxwrao of the Soviet Union proved it? 5 + 5 ? .
1940, Byxwrao of the Soviet Union proved it? 4 + 4 ? .
1948, Hungary's righteousness proved? 1 + c？ Where c is a large natural number.
1956, China Wang Yuan proved? 3 + 4 ? .
1957, Wang Yuan of China successively proved? 3 + 3 ? And then what? 2 + 3 ? .
1962 China pan chengdong and Soviet Barba prove? 1 + 5 ? ,
China's Wang Yuan proved it? 1 + 4 ? .
1965, Byxwrao and BHHopappB of the Soviet union and Bombieri of Italy proved it? 1 + 3 ? .
1966 China Chen Jingrun proved it? 1 + 2 ? .
What about now? 1+ 1? Still unsolved, it can be said that it is the most difficult math problem in the real world. If you can solve this math problem, it will really go down in history.