Math tabloid photo sharing 1
Mathematical tabloid picture sharing II
Mathematical tabloid photo sharing 3
Mathematical tabloid picture sharing 4
Mathematical tabloid photo sharing 5
Mathematical tabloid picture sharing 6
Mathematical tabloid photo sharing 7
Mathematical tabloid picture sharing 8
Mathematical tabloid photo sharing 9
Math tabloid photo sharing 10
Math tabloid photo sharing 1 1
Photo sharing of mathematical tabloids 12
Photo sharing of mathematical tabloids 13
Photo sharing of mathematical tabloids 14
Photo sharing of mathematical tabloids 15
Photo sharing of mathematical tabloids 16
Photo sharing of mathematical tabloids 17
Photo sharing of mathematical tabloids 18
Photo sharing of mathematical tabloids 19
Mathematical tabloid photo sharing 20
"Interesting Mathematics" in Life
Probability of the same Amanome
Suppose you are attending a wedding of 50 people, and someone asks, "I want to know, what is the probability that two people will be in the same Armano here?"
Perhaps most people think this probability is very small, and they may try to calculate it. I guess this probability may be 1/7. However, the correct answer is that only about two guests from the same family attended the wedding.
If this group of people's birthdays are evenly distributed at any time of the year, then the probability that two people have the same birthday is 97%. In other words, you have to attend 30 parties of this size to find that none of the guests have the same date of birth.
The probability that two specific people are born at the same time is 1/365. The key to answer this question is the size of the group. As the number of people increases, the probability that two people will be in the same Amanome will increase. In a group of 10 people, the probability of two people in the same Amanome is about 12%. In a gathering of 50 people, the probability is about 97%. However, only when the number rises to 366 (one of whom may have been born on February 29th) can you be sure that the two people in this group must be the same Amanome.
How many socks can I take to make a pair?
The answer to the question how many pairs of socks can be paired is not two. I can guarantee that if I take out two socks from the drawer on a dark winter morning, they will definitely not match. But if I take out three socks from the drawer, I will definitely have a pair of socks of the same color. Whether the socks are black or blue, there will be a pair of the same color in the end.
Of course, this is only true if the socks are two colors.
If there are blue, black and white socks in the drawer, you must take out at least four pairs if you want to take out a pair of socks with the same color. If there are 10 pairs of socks with different colors in the drawer, you must take out 1 1 pairs of socks. According to the above situation, the mathematical rule is: if you have n kinds of socks, you must take out N+ 1 to ensure that one pair is exactly the same.
Rope burning timing
A rope, burning from one end, takes 1 hour to burn out. Now you need to use this rope and a box of matches to measure for half an hour without looking at your watch. You may think it's easy. You just need to make a mark in the middle of the rope, and then measure the time it takes for the rope to burn halfway.
Unfortunately, however, this rope is not uniform. Some places are thick and some places are thin, so this rope burns at different speeds in different places. It may take only 5 minutes for half of the rope to burn, and 55 minutes for the other half to burn.
Faced with this situation, it seems impossible to accurately calculate the time of 30 minutes by using the rope above, but this is not the case. You can solve the above problems in an innovative way. This method is lit from both ends of the rope at the same time. The rope must take 30 minutes to burn out.
The problem of train running in the opposite direction
The two trains run along the same track, and the speed of each train is 50 miles per hour. When the distance between two carriages is 100 mile, a fly flies from train A to train B at the speed of 60 miles per hour. When it meets the train B, it immediately turns around and flies to the train A, and so on until the two trains collide and crush the fly into pieces. How far did the fly fly before it was crushed to death?
We know that the distance between two cars is 100 mile, and the speed of each train is 50 miles per hour. This means that each train travels 50 miles, that is, two cars collide one hour later. During the hour from the departure of the train to the collision, the fly kept flying at a speed of 60 miles per hour, so when the two cars collided, the fly flew 60 miles. Whether the fly flies in a straight line, along a "Z" line or rolls in the air, the result is the same.
Flipping a coin is not the fairest.
Flipping a coin is a common way to make a decision. People think this method is fair to both sides. Because they think that the probability of coins falling backwards is the same as that of coins falling backwards, both of which are 50%. Interestingly, this very popular idea is not correct.
First of all, although it is unlikely that a coin will stand on the ground when it falls, this possibility exists. Secondly, even if this small possibility is ruled out, the test results show that if you flick the coin with your thumb in a conventional way, the probability that the coin will still be up when it hits the ground is about 5 1%.
The reason why this happens is that with a flick of the thumb, sometimes the money will not turn over, but will only rise like a trembling flying saucer and then fall. If you want to choose next time, look at which side is up first, so you have a greater chance of guessing correctly. But if that person is holding coins and turning his fists one by one, then you should choose the opposite from the beginning.
mathmatics well-known saying
NO 1。 Every problem I solve becomes the rule for solving other problems in the future. Descartes
Second, the economic principle of thinking has been highly developed in mathematics. Mathematics is the highest form of science achieved by various sciences in its high development, and all natural disciplines frequently turn to it for help. Mach
Third. The main goal of mathematics is the public interest and the explanation of natural phenomena. Fourier
Fourth place. Elementary mathematics is one of the most representative creations of modern thought, which is characterized by linking theory with practice through direct channels. acne miliaris
NO5, history makes people wise, poetry makes them elegant, mathematics makes them noble, natural philosophy makes them deep, morality makes them steady, and ethical rhetoric makes them able to contend. bacon
NO6, the first is mathematics, the second is mathematics, and the third is mathematics. roentgen
Seventh place. The incomparable eternity and omnipotence of mathematics and its independent effect on time and cultural background are the direct consequences of its essence. An e-book
NO8, infinite! No other problem has touched the human mind so deeply. Hilbert
NO9, Queen of Mathematics and Science; Queen of arithmetic and mathematics. Gauss
No. 10. For us, the value of mathematical knowledge is not only that it is a powerful tool, but also that mathematics itself is perfect. In the internal or external development of mathematics, we have seen the purest logical thinking activities and the most advanced aesthetic embodiment of wisdom and vitality. Prinsim
No. 1 1, mathematics is a deductive thing, not a sudden appearance. Usually, training is very important. If you look at it from a height, change the situation, change the conditions, or look at it from a higher level, it is all new things. Li Xinming
No. 12. The essence of mathematics lies in freedom. -Cantor
NO 13, music can stimulate or soothe feelings, painting can make people pleasing to the eye, poetry can touch the heartstrings, philosophy can make people gain wisdom, science can improve material life, but mathematics can give all of the above. Klein
New mathematical methods and concepts are often more important than solving mathematical problems themselves. Hua
Mathematical methods permeate and dominate all theoretical branches of natural science. It has increasingly become the main symbol of measuring scientific achievements. Von Newman
Numbers rule the universe. Pythagoras
NO 17, mathematics is more respected than all other sciences. One reason is that his proposition is absolutely reliable and indisputable, and other sciences are often in danger of being overthrown by newly discovered facts. . Another reason why mathematics has a high reputation is that mathematics makes natural science theorem and gives it certain reliability. [Name] Albert Einstein (Jewish theoretical physicist)
No. 18. There is no such thing as mathematics in reality, which has lasted for thousands of years and is really so beautiful. Sullivan did.
No. 19. Philosophers should also study mathematics, because they must jump out of the vast phenomenon and grasp the real essence. And because it is a shortcut for the soul to transition to truth and eternity. Plato
No matter how abstract any branch of mathematics is, it will be applied to the real world one day. Lobachevsky