A classic high IQ reasoning really needs brain burning.
1. A manager has three daughters, and their ages add up to 13. The ages of the three daughters add up to the manager's own age. A subordinate already 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?
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. The three switches outside the door correspond to the three indoor light areas 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, and determine the corresponding relationship between the switch and the light?
You have two jars, 50 red marbles and 50 blue marbles. Choose a jar at random and put a marble in it at random. How do you give the best chance to choose red marbles? What are the chances of getting the red ball in your plan?
Answer:
1. The manager has a pair of twin daughters, aged 2, 2 and 9 respectively; The manager is 32 years old; There are the following possibilities:1*1*1=1,1 * 2 * * 10 = 20,/kloc-0. 2 * 3 * 8 = 48, 2 * 4 * 7 = 56, 2 * 5 * 6 = 60, 3 * 3 * 7 = 63, 3 * 4 * 6 = 72, 3 * 5 * 5 = 75, 4 * 4 * 5 = 80. Among them, there is only one.
2. Put the socks in the sun, and the temperature will rise after the black absorbs heat. Can distinguish between four pairs of black and four pairs of Baise, just two pairs for one person.
3. Turn on the two lights outside the door, one of which is always on, and the other one goes out after ten minutes; When I entered the room, the light was on all the time. Two unlit lights, the light bulb is hot, just turned off, and the cold light is not turned on.
4. The best chance to choose a red pinball: put a red ball in one jar and 49 red balls and 50 blue balls in another jar, and the probability of getting a red ball is greater than 50%.
A selection of high IQ reasoning questions that really need brain burning
1. The underworld leader whom our public security organs have been chasing for a long time was suddenly found electrocuted for no reason on a rainy day. The scene is as follows: the deceased fell on the mud behind a factory in the suburbs, with no obvious facial trauma, wearing ordinary work clothes and mud stains, and a pair of new leather shoes with clear patterns on the soles. The deceased was lying on his back, palm up, fingers resting on a wire that had fallen from disrepair for a long time, a scar on his head, and blood could be seen on the stone next to him.
Xiao Wang, a policeman, said that the deceased must have fallen because of the slippery road, with his head hitting a stone and his fingers getting an electric shock. But captain Jin Ming thinks it's not that simple. I'm afraid he was killed after a conflict with his partner. The scene was obviously forged, so he pointed out two flaws, and Xiao Wang could not help but take it orally. Can you see these two defects?
Answer: if it was a slip and fall on the back, it should be a head injury, the deceased? On your back? , should not see? Have a scar on your head? ; When the palm of your hand is up, your fingers will not get an electric shock when touching the wire, because when your fingers get an electric shock, your muscles will contract instinctively, so only your palm is down.
Mr Wilson, a billionaire, is old and will die soon. He has an unfinished wish, that is, to live alone in his later years, and there is no one to inherit a lot of property. But he also has a younger brother, and he hasn't heard from him since he left home at the age of 12. It has been 60 years now. He only knows that his brother lives in London, but he has no detailed address. He sent detective Mr. Piro to find his brother. He gave Piro a photo of his brother taken 60 years ago, and told him to follow the map and give him the inheritance after finding his brother.
Soon, Mr. Wilson passed away. Pilo went to London and put an advertisement in the newspaper to explain the purpose of his visit. As a result, many people in their 70s have come to recognize their relatives. Pilo never met Wilson's younger brother and found no other clues to inquire about, but he found the real heir from these people. Why is this?
Answer: The Wilson brothers are twins.
3. A farmer crossed the river with a wolf, a sheep and a cabbage, on the left bank of the river. Now he wants to transport all these things to the right bank.
The problem is that there is only one boat in front of him. The boat is too small to hold him and only one thing. In addition, only farmers can punt.
When the farmer was present, these three things lived in peace. As soon as farmers leave, wolves eat sheep and sheep eat cabbage.
Tip: It is not safe to leave the cabbage and the sheep alone, or the wolf and the sheep alone on a certain shore, but the cabbage and the wolf get along well, so let's start from this key point.
Answer:? Method of crossing the river: 1. Carry the sheep across the river and put them on the right bank of the river. 2. Carry the wolf across the river, put it on the right bank of the river, and bring it back when you come back (otherwise we all know what will happen). Put the sheep on the left bank and transport the Chinese cabbage to the right bank of the river. 4. Return to the left bank and transport the sheep to the right bank. Wolves, sheep and Chinese cabbage have all been carried away.
Simplified articles on high IQ reasoning problems that really need brain burning
1. What would you do if you were in the tree?
Answer: the thing is this: this man was cutting down a tree when suddenly a lion came and climbed it. As a result, a snake appeared and he was forced to climb to the top of the tree. At this time, crocodiles in the water thought they had had a big meal and bubbled in succession, so the so-called high IQ problem appeared in the scene you saw! Reliable answer: this topic is to make readers think about two questions: 1, why does this person cut down trees? 2. What should I do in this case? 1, according to the direction he cut down the tree, it may be for bridging; In this narrow escape, what really tests us is persistence (philosophical level). In fact, as long as we walk in the direction of the treetops, trees are likely to fall, bridges will change, and people have a good chance to get out of danger and reach the other side!
Mr. Jiang, a private detective, has just returned from a case in other places. When he got home, he found his room turned upside down. Apparently, his room was stolen? Patronize? Yes. He tidied up his things and found that nothing too important was missing, only a little money.
But as a private detective, he has to admire the skill of the thief, because judging from the order and degree of opening the drawer, he is a habitual thief. So, you are used to stealing drawers, which order do you usually open?
1, open from top to bottom
2. Open from bottom to top in turn
Answer: It should be 2. Reason 1 Commonly used things are generally put on the top, and those that are not commonly used are generally more expensive, so they are put on the bottom. Reason 2 habitual thieves should know that if they pull from above, they must close the top when pulling the lower drawer, which will waste time.
Three boys fell in love with a girl at the same time. In order to decide which of them can marry the girl, they decided to duel with pistols. Xiao Li's hit rate is 30%, and Xiao Huang is better than him, with a hit rate of 50%. The best shooter is Kobayashi, who never makes mistakes, and the hit rate is 100%. Because of this obvious fact, in order to be fair, they decided in this order: Xiao Li shot first, Huang Xiao second and Xiao Lin last. And so on until there is only one person left. So which of these three people has the best chance to survive? What strategies should be adopted?
Answer: First of all, Xiao Li shot Xiao Huang, but because Xiao Li's success rate is only 30%, the chances of this gun being large, medium or small are not great. Assuming Xiao Li misses, Xiao Huang should shoot after Xiao Li hits. Of course, Xiao Huang will choose to shoot Kobayashi, with a 50% hit rate. First of all, suppose Kobayashi was shot, then this is of course the first unfortunate person to be eliminated, but after Xiao Huang shot. Xiao Lin, who should have shot, has been eliminated, so of course it will be Xiao Li's turn to shoot again. Xiao Li's hit rate is 30%, and it is unlikely that the second shot will hit Xiao Huang, so we assume that Xiao Li missed. In this round of shooting Huang Xiao, Xiao Huang will feel relieved and relaxed after successfully killing his biggest competitor, so his 50% hit rate is unlikely to hit again. In this way, it's Xiao Li's turn again. In a state of high tension and concentration, if Xiao Li misses two shots and hits 30% of the third shot, the chance of hitting Xiao Huang will be greatly improved. Then the chance of hitting this shot is as high as 90%, and finally the chance of Xiao Li surviving will be great!
Xiao Min used grandpa's chess pieces as toys, only to find that the black pieces were twice as many as the white ones. So he took four black pieces and three white pieces at a time from this pile of pieces. After several times, he took all the white ones and 16 the black ones. Do you know how many black pieces and white pieces there are?
A: There are 48 black pieces and 24 white pieces.
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