Ask for some interesting math jokes ~ ~ Don't be naive ~ ~

There is something wrong with the probability.

"Teacher, I found something wrong with the probability formula!"

"oh? Tell me your reasons. "

"There are 50 students in our class. According to the calculation, the probability of being asked is 2%, but today you almost let this course.

I answered all the questions. "

2. Possibility

I visited the weather station and saw many latest weather forecasting instruments. After the visit, I asked the stationmaster, "You said there were hundreds."

How is the 75th probability calculated when it rains? "

Without much thought, the stationmaster replied, "That is to say, there are four people here, and three of them think it will rain."

3. Death toll

Jenison, an English poet, wrote a poem, several lines of which read: "Every minute, a person is dying, and everyone.

Every minute, a person is born ... "After reading it, a mathematician wrote to question it. The letter said, "Dear Sir, stop reading. "

This is a quick job, but a few lines are illogical and it is difficult to agree. According to your algorithm, the number of casualties per minute is balanced and accurate.

The number of people on the ball is eternal. But you know, in fact, the population on the earth is growing. properly speaking

There are 1.6749 people born every minute, which is quite different from the number you provided in the poem. To be realistic,

If you don't object, I suggest you use a score of 7/6, that is, change the poem to: "One person dies every minute,

Every minute, 1. 6 people are born ... "

4. Empirical equation

The physics professor walked across the campus and met the math professor. The physics professor is doing an experiment and he has summed up an empirical formula.

Cheng seems to agree with this experimental data. He asked the math professor to look at the equation. They met a week later, the math professor said

This equation doesn't hold water. But at that time, the physics professor had predicted further experimental results with his equation, and the effect was quite good.

Good, so he asked the math professor to review the equation again. Another week later, they met again. The math professor told me

Professor v. physics said that this equation does hold, "but it only applies to the simple case of positive real numbers."

5, nailing

Engineers, physicists and mathematicians received a task at the same time: nailing the wall. Engineers built

Universal nailing machine is a machine that can nail any possible nail into any possible wall. physicist

A series of tests were made on the strength of hammers, nails and walls, and then a revolutionary technology-ultra-low temperature was developed.

Ultrasonic nailing technology. Mathematicians extend the problem to N-dimensional space, and think that a 1 dimensional nail with kink penetrates a.

The problem of N- 1 dimensional super wall. Many basic theorems have been proved. Of course, abstinence of this topic gives a simple answer.

The existence of is far from obvious.

6. Maximum area

A farmer invited engineers, physicists and mathematicians to enclose the largest area with the least fences. engineering

The teacher drew a circle and declared that it was the best design. Physicists pull the fence into a long straight line, assuming that

The fence is infinitely long, so I think it is big enough to enclose half the world. The mathematician gave them a big laugh. He seldom uses fences.

Barbara surrounded herself and said, "I'm outside now."

7. Mathematicians' answers

Physicists and engineers got lost in a hot air balloon in the Grand Canyon. They shouted for help: "Hello!

Where are we? "About 15 minutes later, they heard a response echoing in the valley:" Hey! You are in a hot air balloon.

Yes! The physicist said, "That guy must be a mathematician." The engineer wants to know, "Why?" physicist

Tao: "Because it took him a long time to give a completely correct answer, and this answer is useless."

8. The solution exists.

Engineers, chemists and mathematicians live in three adjacent rooms of an old inn. The engineer's coffee started that night.

When the machine caught fire, he woke up smelling the smoke, unplugged the coffee machine, threw it out of the window, and then went to sleep. soon

The chemist also smelled smoke when he woke up. He found that cigarette butts lit the trash can. He said to himself, "How to put out the fire?

We should lower the fuel temperature below the ignition point and isolate the combustion products from oxygen. Watering can do both. "So.

He dragged the trash can into the bathroom, turned on the tap, put out the fire and went back to sleep. Mathematicians saw all this outside the window.

So, after a while, he didn't worry at all when he found his ashes burning the sheets. Say, "hey, the solution is.

Yes! "Then go to sleep.

9. Negative numbers

Mathematicians, biologists and physicists sat in street cafes and watched people walk into a house across the street.

Get out. They first saw two people go in, and after a long time, they saw three people come out. Physicist: "Do you measure?"

Accurate enough. Biologist: "They reproduce." Mathematician: "If one more person goes in now, then the house."

It will be empty. "

10, fire protection

One day, the mathematician felt that he had had enough of mathematics and ran to the fire brigade to announce that he wanted to be a fireman. fire fighting

The captain said, "You look good, but I have to give you a test first." After the fire chief brought the mathematician to the fire brigade,

There is a warehouse, a fire hydrant and a hose in the courtyard alley. The fire chief asked, "suppose the warehouse is on fire, you

What shall we do? The mathematician replied, "I connected the fire hydrant to the water pipe, turned on the water pipe and put out the fire." firemaster

Said, "Exactly! Last question: suppose you walk into an alley and the warehouse is not on fire, what would you do? " mathematics

The economist pondered for a long time and finally replied, "I will set fire to the warehouse." The fire chief shouted, "What?

That's terrible! Why did you set fire to the warehouse? The mathematician replied, "In this way, I will simplify the problem into a problem I have."

A problem that has been solved. "

1 1, statistician

Mathematics consists of 50% formula, 50% proof and 50% imagination. Topologists can't tell coffee cups from bagels.

. The head of the statistician will say, "It feels good on average."

12, the height of the flagpole

A team of engineers are measuring the height of the flagpole. They only have a tape measure, which is difficult to fix on the flagpole because of the leather.

Rulers always fall. A mathematician passed by and pulled out the flagpole, so it was easy to measure the data. After he left, an engineer

The teacher said to the other, "Mathematicians always do this." We asked for height, but he gave us length! " "

13, difference

Constant function and exponential function ex were walking down the street, and they saw the differential operator far away. The constant function was so scared that it quickly hid and said, "Yes!"

Differentiate, I have nothing! The exponential function said unhurriedly, "It can't do anything to me, I am."

ex！ "Exponential function meets differential operator. Exponential function introduces itself: "Hello, I'm ex." The differential operator said.

: "hello, I'm d/dy!"

14, proof of prime number

Prove that all odd numbers greater than 2 are prime numbers, and different professionals have given different proofs:

Mathematician: 3 is a prime number, 5 is a prime number and 7 is a prime number. According to mathematical induction, all odd numbers greater than 2 are prime numbers.

Physicist: 3 is prime, 5 is prime, 7 is prime, 9 is experimental error, 1 1 is prime, ...

Engineer: 3 is prime, 5 is prime, 7 is prime, 9 is prime, 1 1 is prime, ...

Computer programmer: 3 is prime, 5 is prime, 7 is prime, 7 is prime, 7 is prime, …

Statistician: Let's try a few random numbers, 17 is a prime number, 23 is a prime number, 1 1 is a prime number, …

What are 15 and π?

Mathematician: π is the ratio of circumference to diameter. Engineer: π is about 22/7. Computer Programmer: Under double precision

π is 3. 14 159653589. Nutritionist: You die-hard math brains, the "pie" is delicious and healthy.

Kangde dessert

16, black sheep

Physicists, astronomers and mathematicians were walking on the Scottish Plateau when they happened to see a black sheep. "ah!"

Astronomers said, "It turns out that Scottish sheep are black." "Come on, you can't just say that based on an observation.

The physicist said, "You can only say that this kind of black sheep was found in Scotland." "No," said the mathematician.

"From this observation, you can only say: At this moment, this sheep, from our observation point of view, has one side.

It is black. "

17, no derivative everywhere.

A foreign scholar (engaged in mathematics research) came to visit our school and stayed in the foreign guest house. He's leaving.

I asked him what his impression of our school was, and he said, "The hostel in your school is so bad that it will never happen again."

Dare to live! "I quickly asked the reason. The professor said: "the mouth of the eating bowl can't be guided everywhere, so it's not for people to eat." "

Yes! "

I listened and smiled. The professor's metaphor is really vivid!

Although it is a joke, it can deepen the understanding of the concepts of continuity and derivability:)

My mother said my IQ was only 76. I don't know how high my IQ is I only know that I am a very lethal person. Many people have been hurt because of me. Some of them lost hope in life, and some even committed suicide. So I have always suspected that I have a potential superpower, and this superpower has had a particularly strong effect on my teacher for some reason. 1. I remember the first teacher who died for me. At that time, I was in the first grade of primary school, and my teacher took us to the wild for a natural practice class. Seeing the spring breeze blowing green and the willows sprouting branches, the teacher couldn't help thinking of a question, so he asked, "Students, do you know how to tell the wind direction?" "I know!" A little girl in my class replied, picking up a leaf from the ground and throwing it into the air. "Pick up something and throw it into the air and watch it float there." "Well, that's good." The teacher praised, "Who else would like to show you again and see what wind is blowing now?" "me!" I volunteered, picked up half a brick from the ground and threw it into the air ... "Teacher, it's blowing up and down now!" " ..... I can't remember clearly what the teacher's expression was like at that time. I only remember that he struggled a few times and then died. Later, according to the hospital doctor, he died because of sudden strong stimulation, which led to retrograde qi and blood. In this way, I killed a first-grade teacher who taught us about poultry and animals. Teacher: "There is an animal with two feet. Every morning when the sun comes out, it will wake you up and wake you up. What animal is it? " I replied, "Mom!" Laughing so hard that the teacher almost died! When I got home from the mid-term exam, my mother asked me how I did in the exam. My baby son said that I didn't fill in any questions. Mom asked what this question was, and my baby son said, this is a question about how much you get by multiplying 3 by 7. I don't care. I filled in 15. My mother sprayed the water she just drank on my father's face. Hey ... I'm great!