Classic quiz question 1. There are two unevenly distributed incense, and the burning time is one hour. What method can you use to determine the time of 15 minutes?
2. There are two blind people. They all bought two pairs of black socks and two pairs of white socks. Eight pairs of socks are made of the same cloth, the same size, and each pair of socks is connected with trademark paper. Two blind people accidentally mixed up eight pairs of socks. How can each of them get back two pairs of black socks and two pairs of white socks?
3. A manager has three daughters, and their ages add up to 13, which is equal to the manager's own age. A subordinate knows the manager's age, but still can't determine the age of the manager's three daughters. At this time, the manager said that only one daughter's hair was black, and then the subordinates knew the age of the manager's three daughters. What are the ages of the three daughters? Why?
4. One train leaves Los Angeles for new york at a speed of 15km/h, and the other train leaves new york for Los Angeles at a speed of 20km/h ... If a bird leaves from Los Angeles at the same time with two trains at a speed of 30 km/h, it meets another train and returns, and flies back and forth in turn until the two trains meet, how long does the bird fly?
Three people went to a hotel and stayed in three rooms, each room cost 65,438+00 dollars, so they paid the boss 30 dollars. The next day, the boss thought that $25 was only enough for three rooms, so he asked my brother to return $5 to three guests. Unexpectedly, my brother was insatiable, and only returned 1 USD each, and secretly took it away by himself. But at the beginning, the three of them paid 30 dollars, so 1 dollar?
6. For a batch of lamps numbered 1 ~ 100, all switches are turned on, and the following operations are carried out: rotate in the opposite direction every multiple of 1; A multiple of 2 toggles the switch in the opposite direction again; Multiple of 3, and then turn the switch in the opposite direction? Q: Finally, the number of lights that are off.
The answer to the classic puzzle is 1. A Xiang lights one end, and the neck lights both ends. By the time incense B burned out, it was already 30 minutes. Then ignite the other end of incense A, and the time from this time to burning A is 15 minutes.
2. Unpack each pair of socks, one for each person.
3. The three girls should be 2 years old, 2 years old and 9 years old. Because only one child has black hair, that is, only she has grown up, and the other two are still very young, that is, less than 3 years old, with light hair. The reorganization manager should be at least 25 years old.
Suppose the length of the railway from L.A. to new york is one kilometer. Then it took A/( 15+20) hours for the two trains to meet, which is the time for birds to fly. So the distance a bird flies is speed? Time =30? A/35= 6/7 of the length of the railway from Los Angeles to new york.
5. Typical concept of stealing. In fact, three people only went out of 27 yuan, the eldest got 25 yuan and the younger got 2 yuan.
6. There are 10 lights, namely 1, 4, 9, 16, 25, 36, 49, 64, 8 1, 100. Because every prime number can be divisible by 1 and itself, the prime number light is on. Let a composite number be divisible by n, and n must be an even number. For the composite number other than one party, it will be switched on and off for n times, that is, even times, and the light will remain on; The square number listed above was only switched N- 1 times, so the light went out.
The simplest puzzle 1
Title: Mao Mao said: 10+4=2, and the teacher was right. Why? Answer: 10 +4 = 2 pm
2
Title: Yao Ming is a short-sighted and famous gluttonous boy. Put a pile of books in front of him and an apple behind them. What do you think he will read first? Answer: Nothing.
three
Question: What is the longest car in the world except the train? Answer: Traffic jam.
four
Topic: Who is the most frequent person on Nanjing Road in Shanghai? [Answer] Answer: China people.
five
Topic: three gold? Xin? What's the name of Sanshui? Miao? Three people on the phone? Public? So what should the three ghosts be called? A: Call? Help?
six
Title: Xiaohong has 10 copper coins in his pocket, but they all fall out. What's left in Xiaohong's pocket? Answer: A hole.
seven
Title: A monkey can break a corn every minute. How many corns can a monkey break in an orchard in five minutes? Answer: I didn't get one.
eight
Title: Three trees slip away (hint: pay attention to homophonic). If you want to tie 10 horses, you can only tie a single horse but not two horses. Answer: How?
nine
Title: There is an animal that is as big as a cat and looks like a tiger. What kind of animal is this? The answer is: Little Tiger.
10
Title: Liangliang's birthday is March 30th. What year is this year? Answer: March 30th every year.
1 1
Topic: Two dogs race. Dog A runs fast, while dog B runs slowly. Which dog sweated a lot at the finish line? Answer: Dogs don't sweat.
12
Question: Why is a bottle of medicine marked highly toxic harmless to people? Answer: as long as you don't drink.
13
Question: What is the biggest regret after Adam and Eve got married? Answer: No one came to the wedding reception.
14
Title: Xiaoming only spends money, spending a lot of money every day, but in the end he becomes a millionaire. Why? Answer: I used to be a billionaire.
15
Topic: Two people decided to have a bicycle race to see who can run faster. The competition was held in a flat and spacious stadium. But at the beginning of the race, neither of them wanted to take the lead and both rode slowly. As we all know, none of them will give in to each other, and there is no external interference. In short, everything is fine. Why on earth? Answer: They exchanged bicycles.
16
Q: When is four minus three equal to five? Answer: Cut a corner from something with four corners.
17
Question: Why does Fat Sister A Ying stand on the weighing scale and the pointer only points to 5? Answer: The pointer turned once.
18
Topic: On a windy night, the power was cut off. Xiaoxiao forgot to blow out the candles when she slept. When he woke up the next day, there was a long candle to burn. What happened? Answer: It was blown out by the wind.
19
Title: Pangpang is a famous diver, but one day, he stood on the platform but didn't dare to jump. Why is this? Answer: Because there is no water in the pool.
20
?
Title: The policeman faced two gangsters, but he only had one bullet left. He told the gangsters that whoever moved would be beaten, but those who did not move would be killed. Why? Answer: because it is easier to fight without moving.
1 Super Difficult Puzzle (Pirates Divide Gold Coins)
After five pirates robbed 100 gold coins, they discussed how to distribute them fairly. They agreed on the distribution principle is:
(1) Draw lots to determine each person's distribution sequence number (1, 2, 3, 4, 5);
(2) Pirates who draw lots. 1 Propose a distribution plan, and then five people will vote. If the plan is agreed by more than half of the people, it will be distributed according to his plan, otherwise 1 will be thrown into the sea to feed sharks;
(3) If 1 is thrown into the sea, No.2 puts forward the allocation plan, and then four people are left to vote. If and only if more than half of the people agree, they will be allocated according to his proposal, otherwise they will be thrown into the sea;
4 and so on.
Assuming that every pirate is extremely intelligent and rational, they can make strict logical reasoning and rationally judge their own gains and losses, that is, they can save their lives.
Get the most gold coins. At the same time, assuming that the results of each round of voting can be implemented smoothly, what distribution scheme should the pirates who have drawn 1 put forward to avoid being thrown into the sea and get more gold coins?
Second place (guessing cards)
Mr. S, Mr. P and Mr. Q all know that there are16 * * cards in the desk drawer: A of hearts, Q, 4 of spades, J of 8, 4, 2, 7, 3, K of diamonds, Q, 5, 4, 6, A, 5.
Professor John chooses a card from 16 card, tells Mr. P the number of points in this card, and tells Mr. Q the color of this card. At this time, Professor John asked Mr. P and Mr. Q: Can you infer what this card is from the known points or colors?
So, Mr. S heard the following conversation:
Mr. P: I don't know this card.
Mr q: I know you don't know this card.
Sir: Now I know this card.
Mr. Q: I know that, too.
After listening to the above conversation, Mr. S thought about it and correctly deduced what this card was.
Excuse me: What kind of card is this?
Third (burning rope)
It takes 1 hour to burn an uneven rope from beginning to end. Now several ropes are made of the same material. How to time an hour and fifteen minutes by burning rope?
Fourth place (table tennis)
Suppose there are 100 ping-pong balls arranged together, and two people take turns to put the balls in their pockets. The winner is the person who can get the100th table tennis. The condition is: the person who holds the ball must take at least 1 at a time and not more than 5 at most. Q: If you are the first person to take the ball, how many should you take? How can I take it in the future to ensure that you can get the100th table tennis?
Fifth place (drinking soda)
1 yuan a bottle of soda, drink two empty bottles for a bottle of soda, Q: You have 20 yuan money, how many bottles of soda can you drink at most?
No.6 (Split Gold Bars)
You let the workers work for you for 7 days, and the workers' reward is a gold bar. Gold bars are divided into seven consecutive parts. At the end of each day, you must give them some gold bars. If you are only allowed to break the gold bars twice, how can you pay the workers?
Seventh place (roasted rabbit in Guigu)
Sun Bin and Pang Juan are both disciples of Guiguzi; One day, the ghost came up with a problem: he chose two different integers from 2 to 99, told Sun the product and told Pang the sum.
Pang said: I'm not sure what these two numbers are, but I'm sure you don't know what these two numbers are either.
Sun said: I really didn't know at first, but after listening to your words, I can confirm these two figures now.
Pang said, since you put it that way, I know what these two numbers are.
What are these two numbers? Why?
Eighth place (difficult problem of scooping wine)
It is said that someone gave the proprietress of a restaurant a difficult problem: this person knew that there were only two spoons in the shop, which could scoop 7 ounces of wine and 1 1 ounce of wine respectively, but forced the proprietress to sell him 2 ounces of wine. Smart proprietress is also unambiguous. She used these two spoons to hold the wine, turned it upside down and actually measured out 2 ounces of wine. Can you be smart?
No.9 (five prisoners)
A puzzle that really stumbles hundreds of millions of people is the interview question of Microsoft.
Five prisoners, according to 1-5, caught mung beans in sacks containing 100 mung beans. It is stipulated that everyone should catch at least one, and those who catch at most and at least should be put to death. And they can't communicate with each other, but when they catch, they can find out the remaining number of beans. Ask them who has the best chance of survival.
Tip:
1, are very smart people.
Their principle is to save people first, and then kill more people.
3, 100 don't have to finish it all.
4. If there is any duplication, it will be regarded as the largest or smallest and executed together.
No. 10 (Einstein's question)
Einstein asked a question. At that time, he said that 90% people in the world couldn't answer it. See if you belong to 10%.
Content:
1. There are five houses in five colors.
The owner of each house has different nationalities.
Each of these five people only drinks one brand, smokes one brand and keeps a pet.
No one keeps the same pet, smokes the same brand of cigarettes and drinks the same brand.
Known conditions:
1. The British live in a red house.
The Swede has a dog.
3. Danes drink tea
The green house is on the left of the white house.
5. The owner of the greenhouse drinks coffee
6. PALL MALL smokers have a bird.
7. The owner of the yellow house smokes Dunhill cigarettes.
8. People who live in the middle house drink milk.
9. Norwegians live in the first house.
10. People who smoke mixed cigarettes live with people who own cats.
1 1. Horse owners live next door to smokers on Dunhill Road.
12. People who smoke blue masters drink beer.
13. Germans smoke prince cigarettes
14. Norwegians live next to the blue house.
15. The neighbors of people who smoke mixed cigarettes all drink mineral water.
Question: Who raises fish?
No. 1 1 (socks for the blind)
There are two blind people. They all bought two pairs of black socks and two pairs of white socks. The fabric and size of eight pairs of socks are the same, and each pair of socks is connected with trademark paper. Two blind people accidentally mixed eight pairs of socks. How can each of them get back two pairs of black socks and two pairs of white socks?
No. 12 (king and prophet)
Before going to the execution ground, the king said to the prophet, aren't you good at predicting? Why can't you predict that you will be executed today? I'll give you a chance, and you can predict how I will execute you today. If your prediction is right, I will let you take poison to death; Otherwise, I will hang you. ?
But the wise prophet's answer made it impossible for the king to execute him anyway.
How did he predict it?
No. 13 (ball weighing)
There are 12 balls and a balance. Now we know that only one of them is different in weight from the others. How can we find the ball after weighing it three times? Note that this problem does not indicate whether the weight of the ball is light or heavy, so it needs careful consideration. )
No. 14 (three bulbs)
The three switches outside the door correspond to the three bulbs in the room respectively, and the wiring is good. When you control the switch outside the door, you can't see the light in the room. Now you are only allowed to enter the door once. Make sure that the switch corresponds to the light. This is also a Microsoft interview question, which I personally think is a type.
No. 15 (black hat ball)
A group of people are dancing, each wearing a hat. There are only two kinds of hats, black and white, and there is at least one kind of black. Everyone can see the color of other people's hats, but not their own. The host first shows you what hats others are wearing, and then turns off the lights. If someone thinks he is wearing a black hat, he will slap himself in the face. The first time I turned off the lights, there was no sound. So I turned on the light again and everyone watched it again. When I turned off the light, it was still silent. I didn't get a slap in the face until I turned off the light for the third time. How many people are wearing black hats?
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