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75 logical thinking questions

原创 Linux操作系统 作者:keeking 时间:2011-07-10 11:00:08 0 删除 编辑

【1】 assume there is a pond, there are infinitely many of the water. There are 2 empty water bottles, volume was 5 liter and 6 liters. The question is how these two water bottles only pond made from 3 liters of water.
【2】 Zhou Yu Lin Wen's mother is a cement plant laboratory technician. One day, Wen Zhou came to the laboratory homework. Dont go out for fun. \glass, handy cup full of water and an empty glass partition, right? \You think of it, \Mike's hit rate is 30%, small yellow better than his hit rate is 50%, the best is Kobayashi gunmen, he never mistakes, hit rate is 100%. Because of this obvious fact, in all fairness, they decided by this order: Xiao Li, the first shot, small yellow second, Kobayashi final. Then the cycle, until they left the next person. So the three people who survived the best chance of it? They should take what kind of strategy?

【4】 one of two prisoners held prisoner room. To this day, the prison cell and will provide a can of soup, so that the two prisoners themselves points. Initially, the two were often in dispute because they are always some people that the other side of the soup more than their own. Later they found a way to best of both worlds: a man to soup, let the other people get elected. So on such a dispute resolved. But now this cell there was another add to the mix a new prisoner, is now three to sub-soup. Must find a new way to maintain peace between them. How to do?
by: psychological problems, not a logical problem
【5】 at a rectangular table put a n-sized round coins. Some of these coins may not entirely within the desktop may also be some overlap; when more put a coin in its center of a circle on the desktop, the new coins will put some coins will overlap with the original. Please show the entire desktop can be completely covered with 4n coins
【6】 a ball, a length of the ball diameter is about 2 / 3 the length of the ruler. How do you measure the radius of the sphere? There are many ways to see who's more clever
【7】 five of the same size one yuan coins. Required 22 contact with, it should be how to put?

【8】 guess Mr. licensing issues
S, P, Mr., Q Mr. table drawer, they know there are 16 playing cards: hearts A, Q, 4 spades J, 8,4, 2,7,3 flowers K, Q, 5,4,6 box A,cheap christian louboutin shoes, 5. Professor John pick from 16 cards in a card and this card points to tell Mr. P, the card's color to tell Mr. Q. At this point, Professor John asked Mr. P, Mr. Q: You can color in the known points, or extrapolate what brand card is it? Thus, S heard the following dialogue, Mr.: P: I'm not sure this card.
Q: I know you do not know this card.
P President: Now I know this card. Mr.
Q: I know.
After listening to the dialogue above, S President thinks for a while after the launch of this card to correct what brand.
ask: What is a license card?
【9】 a professor of logic professor, three students, and three students are very smart!
teach them one day out of a question, professor at the forehead of each person posted a note and tell them that everyone have a piece of paper to write a positive integer, and a number equal to the first two 3! (Each person can see the other two numbers, but could not see their own)
professor asked the first student: Can you guess my number right? Answer: No, ask the second, not third, can not, ask first, not second, not the third: I guess, is not 144! Professor very satisfied smile. I ask you to guess the other two people count?
【10】 a city with a car and gave the driver fled the city only two events
car colors, blue 15% green 85%
time of the incident a man at the scene saw
His evidence is the blue car
But according to experts in the field analysis, was able to see the right kind of conditions the possibility is 80%
then the car is the blue car accident probability in the end is how much?
【11 Under any one of 240 kg water, he would like to make money destined for arid regions. He carried a maximum of 60 kg, and each one kilometer to move 1 kg of water (even water). Suppose the starting price of water for 0, then, with the transport distance is proportional to (that is 10 kilometers to 10 yuan / kg, at 20 kilometers to 20 yuan / kg ......), they assume that he must be safe to return, I ask, how much he up to?
【12】 now 100 hp with 100 stones, 3 types of horse, large horse; medium-sized horse with a small horse. Including a Malaysian one can pack three stones, you can pack two medium-sized horse, but can pack a small horse two stone. Q. How many horses Malaysia and medium-sized horse like a small horse? (The key is to be used just 100 hp)
【13】 1 = 5 2 = 15 3 = 2154 = 2145 then 5 =?
【14】 has 2n individual line for a movie, tickets price is 50 cents. In the 2n individuals, one of them only 50 cents n individuals, other n individuals have one U.S. dollar (paper ticket). Stupid when cinema began selling tickets not 1 cent.
Q: How many methods of making every line has one U.S. dollar a ticket, the cinema has 50 cents give change
Note:
1 U.S. dollar = 100 cents
who has one U.S. dollar with the notes, could not break into two of 50 cents
【15】 spend 8 dollars a person bought a chicken, nine dollars sold, then he feels is not worth to spend 10 dollars bought back, 11 sold to another person. Asked how much he earned?
【16】 There is a sports competition with a total of M items, have players A, B, C to participate in each project, the first, second and third respectively in the X, Y, Z points, including X, Y, Z is a positive integer and X> Y> Z. A final 22 points, B and C both have 9 points, B won the first race in the 100 meters. Request the value of M, and asked who was second in the high jump.

【17】 premise:
1 with five five colors of the house
2 nationality of each owner of the house are different
3 each of the five individuals drink a drink , took only one kind of brand of cigarettes, only to keep a kind of pet
4 no one has the same pet, smoke the same brand of cigarettes, drink the same beverage
Tip:
1 Englishman living in the red house in
2 Swede keeps a dog
3 Danes
4 green tea house in the White house on the left
5 green house owner drinks coffee
6 pumping PALL MALL cigarettes were kept a a bird
7 yellow house owner pumping DUNHILL cigarette
8 living in the middle of that room of people drink milk
9 Norwegians live in the first house
10 pumping mix of people who live in raising tobacco cat who lived next to
11 horses who smoke in the next pumping DUNHILL
12 pumping BLUE MASTER smoke drink beer
13 German pumping PRINCE smoke
14 Norwegian lives in the house pumping next
15 neighbors who smoke mixed drink mineral water
question is: who fish? ? ?
【18】 five individuals from different places to live in different houses, raise different animals, different brands of cigarette smoke, drink different beverages, like different food. According to the following leads to determine who is a cat person.
1. Red House in the blue house on the right, white house on the left (not necessarily adjacent)
2. Huang house owners from Hong Kong, and his house is not the left.
3. Favorite pizza of people live in next door who like to drink mineral water.
4. Beijing people love to drink from Maotai,christian louboutin boots uk, who lived in Shanghai from next door.
5. Hilton cigarette smoking in the horse people who live right next door.
6. People who like to drink beer, love to eat chicken.
7. Green houses to dog.
8. Eat noodle live next door to the snake raised.
9. From Tianjin's neighbors (adjacent to) a love to eat beef, and one from Chengdu.
10. Fish live in the far right of the house.
11. Smoking Marlboro cigarettes, people who live in smoking and smoking cigarettes Hilton \Red House who Aihe Cha.
13. People who like to drink wine, eat tofu people living in right next door.
14. Cigarette smoking Hongtashan person is not living in Kent cigarettes people smoke next to, not the people from Shanghai and neighboring.
15. From Shanghai for a few second left to live in the house.
16. People like to drink mineral water, live in the most middle of the house.
17. People who eat too fond of wine noodles.
18. Smoking, \, 6,5,5,3,3,manolo blahnik sale,3,3,7,7,7,7
king of long-term A in their hands, Wang, 2, A, K, Q, J, 10, Q, J, 10,9,8,5,5,4,4
of long-term B in their hands 2,cheap jimmy choo shoes uk,2, A, A, A, K, K, Q, J, 10,9,9,8,6,6, 4,4
three are dummy, know each other cards. Requirements are: not wrong card in the three cases, the landlord must either lose or win.
Q: Which party will win?
【20】 on the first floor to 10 floor elevator entrance on each floor have stood a diamond, diamond sizes. You take the elevator from floor to 10 floor, each floor elevator door will open once, only to take a diamond, and asked how to get the biggest one?
【21】 U2 choir arrived in 17 minutes, get concert venue, en route across a bridge, four starting from the bridge of the same side, you have to help them reach the other side, the sky is dark, and they only a flashlight. Can have up to two people at one time with the bridge, and bridge the time to hold a flashlight, so have to bring someone to bring the flashlight back and forth across the bridge. Flashlight is lost can not be passed way. Four different walking speeds, if two peers who Zeyi slower rate shall prevail. Bono needs to spend 1 minute crossing the bridge, Edge need to spend 2 minutes across the bridge, Adam need to spend 5 minutes across the bridge, Larry need to spend 10 minutes to cross the bridge. How do they cross the bridge in 17 minutes, then?
【22】 a family with two children, one of them girls, girls asked the other is the probability of
(assuming the same probability of a boy or woman)
【23】 Why manhole covers are round of?
【24】 7 grams, 2 grams each in weight, balance 1, how only three of these items will be 140 g 50,90 g of salt into each one?
【25】 chip test: a 2k chips, known good chips more than a bad chip. Please design algorithm to find a
from which good chips, show that you limit the number of comparisons used.
which: good chips and other chips when compared to other right is given a chip is good or bad.
more bad chips and other chips, it will randomly give good or bad.
【26】 saying there are 12 eggs, one is bad (and the rest of eggs of different weight), are now required to balance that with the three, which said the eggs are bad!
【27】 100 people to answer five questions, 81 people answer the first question, 91 correct answers the second question, 85 people answer the third question, 79 people answer the fourth question, 74 correct answers to the fifth question, answer three questions or three questions over who pass muster, then the 100 people in at least () were passed.
【28】 Eason and a song called Decade
Lu Shan and a song called 3650 Nights
it is asked, ten years may be how many days?
【29】
1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
next line is what?
【30】 uneven burning a rope to spend an hour, how to use it to judge for half an hour?
uneven burn a rope end from scratch burn needs a total of 1 hour. There are certain sections of the material the same rope, and asked how to burn rope way to time one hour 15 minutes then? (Microsoft's document questions)
【31】 There are three medicines, were re-1g, 2g, 3g, into a number of bottles, each bottle is now able to determine only one drug, and a bottle of pills enough, can only say that once the bottle is containing all the types of medicine? If there are four class medicine
it? 5 work? N type it (N may be a few)?
If it is a total of m-n class medicine bottle candy in it (m, n is a positive integer, the quality of drugs vary but the quality of all drugs known)? You can only say one will know the medicine bottle is?
Note: Of course a price, saying the medicine we had not had
【32】 assume the table has three sealed box, a box with two silver coins (1 coin = 10 pence), a box with two nickel (1 nickel = 5 pennies), and a box with a silver and a nickel. The boxes were marked 10 pence, 15 pence and 20 pence, but each label is wrong. Allows you a box out from a coin box on the front, see the coin, can you tell contents of each box things?
【33】 has a large watermelon, with a fruit knife and neatly cut, cut a total of 9 knives, cut the number of copies up to at least be able to cut the number of copies?
major is a process, not the most important results
【34】 a huge circular pool, surrounded by full of rat holes. A cat chasing mice to the pool edge, mouse hole is not enough time to fall into the pool. Cats continue to attempt to catch the mouse along the edge of the pool (the cat would not join the water). Known mouse V cat = 4V. Asked whether there are ways to get rid of mice chasing cats?
【35】 There are three buckets, two large can hold 8 kg of water, a small can hold 3 kg of water, now filled with 16 kilograms of the two barrels of water is 8 pounds of barrels, kegs empty with, how to put 16 pounds of water to the four individuals, each of 4 kg. No other tool, 4 Bring your own container, will leave the water no longer want to come back.
【36】 Once there was an old watchmaker, as a church mounted a large bell. His old age vertigo, the length of the needle assembly is wrong, but the short needle walking speed is 12 times as long needles. Assembly time is 6:00, he means the short pin \Install good old watchmaker went home. People look at this clock for a while 7:00, and after a little while to 8:00, and were surprised and immediately went to the old watchmaker. Arrived at the old watchmaker, already 19 o'clock or so. He took out his watch to a pair of clock accuracy, suspicious people wish to make fun of him, an angry and went home. This clock or 8:00, 9:00 to run, people to see a watchmaker. The next day the old watchmaker 8:00 came with the table more than a pair is still accurate. Please think about the old watchmaker for the first time when the table is 7 points a few minutes? The second is 8:00 on the table a few minutes?
【37】 now have 2 horses, 3 cows and 4 sheep, they are dissatisfied with their total of 10,000 paper money (the ancient monetary unit). If two horses with a cow, or three cows with a sheep, or 4 sheep with a horse, they are precisely the respective total of 10,000 paper money. Q: horses, cattle, sheep penny how much each unit?
【38】 day, harlan shop a customer came to pick up 25 per cargo, the customer took out 100 yuan, harlan did not change for non-open, white fly on to the next door shop for these 100 into a change, back to the customer looking for a 75 per change. Moment, the flying white come to harlan, said the money just is false, harlan immediately to fly for a white Zhang real money, and asked how much compensation harlan?
【39】 monkey rope climbing
This Road Mechanics strange at first glance very simple question, but it is said to Lewis. Carol confused. As for the question whether the Road
blame the result of \In short, in an unlucky moment, he consulted it on the following issues:
a rope through the pulley without friction at its one end hung a 10 pound weight, the rope on the other end
have monkeys, just with the weight balance. When the monkeys began to climb, the weight will be how to move it?
\code will increase at an accelerating pace. Clifton (and Harcourt) is that the weight will be the same as with monkeys
speed up rising, Sampson said, however, weight will will fall! \reciprocal of the speed of a monkey eating an apple, \Seriously, This question is very interesting project, worthy of serious scrutiny. It is interesting to note problems with the mechanics of the close ties between the
.
【40】 two hollow balls, the size and weight of the same, but different materials. One is gold, one is lead. Hollow spheres have the same color map the surface of the paint. Now requires the surface of the paint without destroying the conditions which with a simple method that is gold, which is the lead.
【41】 have 23 coins on the table 10 facing up. Suppose someone your eyes blindfolded, and not your hand You Mo
coin face anyway. The best way for you to use these coins into two piles, each pile face up the same number of coins.
【42】 three villages A, B, C, and three towns A, B, C is located within the crater shown in Fig.
historical reasons, the only village of the same name and only travel between the towns. To facilitate transport, they
ready to repair the railway. The question is: how to repair the craters in the three railways connected with the A town A village,
B Village and Town B, C and C Town Village. These railways intersect each other can not. (Digging a cave, repair the bridge, interchange
not, absolutely plane problem). Think again come up with the answer to this question shows a problem.
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● ; ●
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● ; ; ●
● ●
● ; ; ●
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A C B
● ; ● ●
● ; ● ●
● ; ● ●
● ● ●
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● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 43】 room, three lights, and outside the three switches, one switch controls only one lamp outside the room can not see into the house only once
how, you know which switch controls which light?
4 it ~
【44】 2 +7-2 +7 all have a match pieces, the movement of any one, the answer called for 30
Note: the following interpretation of the question because of writing, 2 is composed of three horizontal cross-fold, 7 fold by the two horizontal component
【45】 5 pirates took away the cache of the 100 gold, and intended to divide the spoils of war. These are about democracy, pirates (of course, their own unique democracy), their habits
is distributed by the following way: the most powerful distribution plan proposed by a pirate, and then all the pirates (including
including proposals to themselves) to vote on this program. If 50% or more of the pirates agreed to this plan, the case on this side
distribution of spoils of war was adopted accordingly. Otherwise, a proposal will be thrown into the sea of pirates, and then the next one the most powerful pirate
repeated the process.
all the pirates are happy to see one of their associates were thrown into the sea, but if they choose
, they still would rather have a cash. They certainly do not want that they have been thrown overboard. All the pirates are
is rational, and that the other pirates are also rational. In addition, no two pirates are equally powerful
entirely in accordance with these pirates to the next level on the good of the seating arrangements, and that everyone is clear that he himself and his
all levels. The Nuggets can not be divided, does not allow several pirates Total gold, as any pirate
not believe that his associates will comply with the Nuggets on the sharing arrangement. This is a group only for their intended per person
Pirates of the sea.
the most vicious of a pirate what should be proposed distribution plan so that he can get the most gold?
【46】 them who the greatest chance of survival?
5 prisoners, respectively, by 1-5 in sacks with 100 arrested mung bean, each have at least grasp a while to grasp the most and the least people will be killed, but between them can not exchange, but when caught, you can work out the number of remaining beans. Ask them who the greatest chance of survival? Tip:
1, they are very smart people
2, their principle is to first seek life insurance, go no more killing
3,100 pieces are sub End
4, if repeated The case, also considered the maximum or minimum, to be executed
【47】 5 monkeys found a pile of peaches at the beach and decided to split the next day. The next morning, the first monkeys first came, it left inseparable from the right sub-divided on the sea, threw one, just can be divided into five copies, it takes a walk on their own. No. 2,3,4,5 monkeys have encountered the same problem, using the same method, are thrown away after one, just can be divided into five copies. ask this pile of peaches at least how many?
【48】 saying that one day a pirate ship was the world to drop down to hit a cow, five unlucky guy had fled to an island, found on the island alone, and fortunately there are trees coconut trees There are a monkey!
we all picked off the coconut together, but the day was late, so I go to bed first.
night a guy got up quietly, quietly coconut into 5 copies of the results found in a coconut, easily give the lucky monkey, and then quietly hidden one, and then mixed with the remaining coconut back in place, eventually dropping back to sleep quietly.
After a while Another guy got up quietly, quietly remaining coconut into 5 copies of the results found in a coconut, easily gave the lucky monkey on, and then quietly drop a reservoir, the remaining coconut mixed together back in place, eventually dropping back to sleep quietly.
then after a while ...
...
then after a while ...
short five guys get up too, have done the same thing
morning we all wake up, their dismal sub coconut, and this really is not an ordinary monkey lucky, because this is divided into five minutes after the coconut is actually more of a coconut, had to gave it up.
question is, this pile of coconuts at least how many?
【49】 Xiao Ming and Zhang Xiaoqiang are student teachers, teacher's birthday Zhang M N months on,
2 people know the teacher's birthday Zhang 10 in the group the following day,
Zhang M value of the teacher to tell Xiaoming, the N value to tell the Xiaoqiang,
Zhang teacher asks them to know his birthday is the day it?
3 月 4 日 on March 5 March 8 月 4 日
6 June 7 月 1 日
9 September 5 月 1 日
12 December 2 December 8
little say so: If I do not know if, and John certainly did not know
Xiaoqiang said: Originally I do not know, but now I know
little say so: Oh, I know the dialogue
inferred based on the above please teacher's birthday is the day Chang


【50】 a logician strayed into a village, was jailed in the prison, chiefs wanting to release his logician, said: \1. now choose from one of two soldiers responsible to answer any questions you mentioned (Y / N), one of the honest nature, one lying into the nature of life and death for you to choose the future. \question to a soldier, and then open the door to leave calmly. Logicians how to ask questions?
【51】 talk about the past ah, there was a rich man, he has 30 children, of whom 15 were born to the late ex-wife, and the remaining 15 were born following the room, which wanted a woman after she his eldest son born to inherit property, so one day he said to him: \The 30 children arranged in a circle, from a number of them since the child every 10 let stand out, which until the last remaining children, which child will inherit your property now! \I rely on, the title means quite content, and well, though to be fair, I'll do it ~ However, when tick the ongoing process of going down, this rich, dumbfounded, and he found the first 14 children have been removed is the former wife, and the next to be removed or his former wife, the rich immediately waved his big hands, stop, go back down now from the number of children, following the room, is the malicious and the stepmother of a thought, the countdown to the countdown, I 15 sons of a match for you ah ~ she immediately agreed to the motion of the rich, do you think in the end who did it ~
successor】 【52 \ate; cattle 23, 9 days and ate grass. If cattle 21, then a few days can pasture grass and ate it? and pasture grass is constantly growing. \】 a businessman riding a donkey to cross the 1,000 km-long desert to sell 3000 carrots. Known ass off to pack 1000 carrot, but also for every one kilometer to go eat a carrot. Q: How many merchants sold a total of carrots?
【54】 10 boxes of gold, each box 100, each have one or two
corrupt officials, to a box of each block wore off a money shortage
please say the amount of time to find that box < br> 【55】 your workers to work for you seven days to give workers a gold bar. Gold bars into level 7 connected, you must have paid at the end of the day, if you are only allowed two breaks in the gold bar, how do you pay to your workers?
【56】 ten Pingyao, with 100 per bottle in both drugs (like now installed 100 less, are 10 20's, no matter, we would come so), which eight medicine bottle weight 10 grams per piece, and another two bottles of the drug in each tablet weight 9 grams. With a very precise small scale, only that one, how to find the lighter weight of the two bottles?
【57】 a manager has three daughters, three daughters, ages add up to equal to 13, up by three daughters, age is equal to your age manager, a subordinate manager has to know the age, but still can not determine Manager 3 daughter's age, then manager said that only one daughter's hair is black, then the subordinate manager will know the age of three daughters. Will the three daughters aged much? Why?
【58】 there are three people go to a hotel, housing three rooms, each room $ 10, so they paid a total of $ 30 boss the next day, the boss felt three-room only $ 25 is enough so called younger brother return $ 5 to the three guests, Who knows greedy younger brother, only to return $ 1 per person, himself secretly took $ 2 case, we mean that each of the three guests to spend nine dollars, and all three had spent $ 27, then with younger brother who pocketed a not $ 2, a total of $ 29. However, three of them had to pay a total of $ 30 so it still $ 1?
【59】 two blind, they each bought two pairs of black socks and two pairs of white socks, 8 pairs of socks a cloth quality, same size, and each has a trademark on the socks of the paper attached. The two blind accidentally eight pairs of socks a mix. Each of them how to retrieve the black socks and two pairs of what the White Sox?
【60】 there a train speed of 15 km per hour from Los Angeles went straight to New York, another train speed of 20 kilometers per hour from New York bound for Los Angeles. If there is a bird, and 30 km per hour and two trains start at the same time, starting from Los Angeles, hit another vehicle and returned, followed by two trains back and forth in flight, until the two trains meet, I ask that this only the birds flying over long distances?
【61】 You have two jars, 50 red marbles and 50 blue marbles, randomly selected a pot and randomly selected a pinball into the jar, how to select the most red marbles opportunities? In your plan, get the exact red ball are the odds?
【62】 Do you have four tablets of the jar, each has a certain weight pills, pills are not contaminated by pollution, the weight +1. Weighing only once, how to determine which jar is contaminated medicine ?
【63】 The group numbered 1 to 100, all switches facing up (open) of the lamp for the following *: Where a multiple of the opposite direction in a car door; 2 Which way turn in a switch; 3 Which way then a car door ... ... Q: Finally, the state's lights out for the relevant number.
【64】 imagine you in the mirror, I ask, why is the mirror image can be reversed or so, but can not reverse up and down?
【65】 group of people dance, and everyone wore a hat head. Only white and black hat, black with at least one. Everyone can see other people the color of a hat, but can not see their own. Host let us look at other people wearing the Shen Yao hat, and then turn off the lights, if anyone think they wear the black hat, hit yourself a slap in the face. First turn off the lights, no sound. So I turn on the lights, we see it again, turn off the lights when the still silent. Until the third turn off the lights, only slapping sound crackling sounds. Asked how many people were wearing black hats?

【66】 two rings with a radius of 1 and 2, respectively, within the great circle around the great circle of small round circle in the week, and asked to switch a few weeks of small round itself? If the great circle of the external, small round weeks it's own switch?
【67】 1 yuan a bottle of soda, after drinking two bottles for a bottle of soda, and asked: Do you have 20 dollars, up to drink bottles of soft drinks?
【68】 has three red hats, four black hat, white hat 5. To 10 individuals from low to high station as a team and give them every man wore a hat. Everyone can not see the color of his hat, but could only see those people standing in front of the hat color. (So in the end one can see the front of the head color of the hat-9, while the top hat of the man who can not see. Now start from the last man, asked him if he knew his hat color, and if he said do not know, we continue to ask the person in front of him. Suppose front man would know that wearing a black hat. why the?
【69】 assumptions lined 100 table tennis, the ball turns into two people pockets, they will get the first 100 people of table tennis winner. conditions are: at least those who bring it every time the ball 1, but up to no more than 5, ask: If the first ball of the person you are, you should Take a few? the future, how can take to ensure you get the first one hundred table tennis?
【70】 Professor Lu Mu said: \mathematical problems. I have a goat, a neighbor, weighs only 54 pounds, it has been for several quarters in a nearby mountain lord it over. Then a good thing that the introduction of a new goat, than it should step out of the 3 pounds. the beginning, they can live with each other in harmony. But one day, less steep mountain goat standing on top of its competitors to swoop in the past, that rivals stood on the mound to meet the challenges , while the challenger clearly had a commanding advantage. Unfortunately, due to violent collisions, two goats have expired had.
now to talk about the magic of this title. on goat rearing has studied, also wrote a book George. Abercrombie said: \\Only two people knew the store scoop spoon of wine, two were 7 and 11 to scoop the two wines, but insisted his boss wife sold two liquor 2. wise proprietress unambiguous, with the spoon in the jar in the two scoop wine and shuffling back and forth, actually measure out 2 two wine smart you can do right?
【72】 known: there is only one tank for each aircraft, aircraft refueling between each other (note that each other, without refueling) a box of oil for an aircraft flying half circle around the earth, the problem: In order to make a circle around the Earth at least a plane back to the airport take-off, at least deployed several aircraft? (all aircraft off from the same airport, and must return to the airport security does not allow half-way landing, and is not airport)
【73】 9 points in 10 straight draw, required on each line at least three points?

【74】 a fork in the road leading to the respective country and lying to the country honestly. to the two people known to one is honest country, and the other is lying country. honest country always tell the truth, never lie, lie country. Now you're going to lie the country, but do not know which way to turn, need to ask the two men. I ask how should ask?
【75】 24 hours a day into the clock's hour hand, minute and second hands complete coincidence together several times when I? What were all the time? How do you count out?

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