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The original title of this question was about three people staying in a hotel. But the meaning of the question is the same.
First of all, the question leads you into a misunderstanding.
27 yuan is the total amount paid by the guest, and 2 yuan is 2 yuan of the money the boss is looking for, one is collected by the boss, and the other is given by the boss, obviously, it should be 27-2.
This question, from the perspective of break-even:
From the boss's point of view, the money should be 30-5=25 yuan, and the boss receives 25 yuan.
From the perspective of the small worker, it is 2 yuan, and the small worker hides 2 of the 5 yuan that the boss is looking for.
From the guest's point of view, it was 3 yuan, and I found 3 yuan.
Therefore, it should be listed as 30 (total money) = 25 (the money collected by the boss) + 2 (2 yuan out of 5 yuan found by the boss) + 3 (the remaining 3 yuan out of the 5 yuan found by the boss).
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The 30 yuan waiter took 2 yuan, spent 25 yuan on dinner, and returned 3 yuan. That is, 30 = 25 3 2, and you can't use 27 2 (the waiter took), because 27 25 (the meal money) 2 (the waiter took), 2 has already been included!
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29 27+ 2 under the waiter secret actually paid; But these 27 include the 25 and the service secrets charged by the hotel, and the addition itself is meaningless.
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The $2 written above is $27 inside. 27=25+2.$27 should be added to the $3 that was found to him.
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It's been a brain teaser for a long time, because it's supposed to be 28, and they've all miscalculated, and it's an old question.
Check it out on your own.
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A: Each soccer ball is equal to 60 yuan.
Let the ball be x and the ball be y
A can be simplified to 5x+y=120
b is simplified to 5x=y
Then it's a good solution. 5x+y+5x=120+y, subtract two of y from both sides at the same time. 5x+5x=120,10x=120,x=12 set into b "5x=y" is 5*12=y=60
So football is 60, I'm not a very good teacher, it's a bit messy to write, can you understand it?
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1 When will the clock not go? Answer: The clock doesn't go in the first place.
2 What books can't you buy in a bookstore? Answer: Suicide note or secretary.
3 What is the narrowest road? Answer: The road is narrow.
4 What can't you eat? Answer: "East-West" direction.
8 Why didn't a man fall off an airplane and die? Answer: The plane is parked on the ground.
6 What kind of flower is a flower that blooms all year round? Answer: plastic flowers.
7 What is the most popular English alphabet? Answer: cd.
8 Who never sees a doctor when sick? Answer: Blind.
9 Xiao Ming knows the answer to the test paper, why does he often look at his classmates? Answer: Xiao Ming is a teacher.
10 What is used to judge the age of a chicken? Answer: With teeth.
11 Why doesn't an egg break when hammered with a hammer? Answer: Of course the hammer will not break.
12 Who is it easy for a boxing champion to get knocked out? Answer: Sleepy bugs.
13 What is it that the heavens do not know, and you do not know me? Answer: The sole is broken.
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1.Mr. Wang's belt suddenly broke. His pants were loose and big. There was nothing tied and hung around, and the pants never fell off all morning. Why is that?
He slept in these pants all morning].
2.Two buckets of the same size are filled with rice and peanuts respectively, and they are all poured into a large bucket and mixed evenly. After pouring them all back into the original 2 barrels, how many barrels do they have?
Less than 2 barrels. Because there are a lot of gaps between peanuts. When mixed with rice, the rice enters the space between the peanuts].
3.What people watch TV the most attentively.
TV repairman].
4.The big stars in the zoo are the smartest, so what animal is the second smartest?
Little Star] 5.What animals most resemble tiger cubs. ?
Big Tiger]
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A father, a mother, an older brother, a younger sister, a nephew, a niece, an uncle, an aunt, a son, a daughter, and a cousin and cousin. You would say, "There are 12 people in this house."
Actually, no, there are only 4 people in this family. The answer is assumed that A, B, C, and D are four people, A and B are biological siblings, A is an older brother and has a son C, and B is a younger sister and has a daughter D.
So: A dad A is C's dad.
A mom B is D's mom.
An elder brother A is the elder brother of B.
A sister B is A's sister.
A nephew C is a nephew of B.
A niece d is a's niece.
An uncle A is D's uncle.
An aunt B is C's aunt.
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1The pig has escaped from the pigsty, what shall we do? Hit a person named --- Wang Leehom (bang inside).
2The pigs have come out of the pen again, what shall we do? Hit a person's name--- Han Hong (also booming).
3 The first words that the ancient teacher said when he entered the classroom were ——— Chinese dialect 4 A green meadow ——— plum blossoms.
5 came a sheep ——— strawberries.
6 And came another wolf——— star fruit or bayberry.
7 There were three monkeys walking on the road, walking and walking, and in winter, a big pear fell, and one of the monkeys said a word, and called the names of the three countries——— Italy (hey, big pear). Australia (Ao, big pear) Spain (hi, move).
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It's really fake.
Lao Wang scolded others as pigs last year and was fined 15,000 yuan, why was he fined 30,000 yuan for scolding others as pigs this year?
The answer is – because the price of pork has gone up. Hee-hee, that's good.
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In the English alphabet, the ET is gone, and how many English letters are left? Answer: 21. Because ET is an alien, it also took the UFO.
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1.Problem: There are two watches in the watch shop, and one watch has the exact time twice a day. The other table is inaccurate every hour, but why do people only buy the latter? Answer: Because the former is immobile.
2.What does a stuttering person do to suffer the most? Answer: Long haul**.
3.At what point does 1 plus 2 not equal 3? Answer: When you miscalculate.
4.What is the painter's apprentice called? Answer: It's called a good womanizer.
5.For what reason the most people die? Answer: When rescue fails.
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Guns in the toilet - dung hair paint the wall (work hard).
Artillery at the bottom of the well - deep earthquake (Shenzhen).
Thousands of miles of Gobi - Changsha.
Wear a padded jacket in summer - cover sweat (Wuhan).
Calm and calm - Ningbo.
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Topic There was a plane that flew from A to B in an hour. It took two and a half hours to fly from B to A. Both flights were normal and on the same path, excluding other external factors, such as air resistance.
So why is that?
Answer One hour = two and a half hours.
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The topic is an animal with quite large nostrils I have never seen it, is it a brain teaser Big nostril beast hippopotamus. Whale elephant with the largest nostrils.
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Xiao Ming has never seen his father, one day his mother took Xiao Ming to the airport to pick up his father, 4 people got off the plane, Xiao Ming ran over and hugged a person and called Dad, that person is indeed Xiao Ming's father. How did Xiao Ming know? - The other 3 were women.
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Xiao Ming walked from Tianjin to Beijing, why did Xiao Ming's feet not land?
Answer: Because Xiao Ming wears shoes!
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There was a pit, and there was no water in the pit. Why do people fall and drown? (That's a manure pit).
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What is in the middle of the Pacific Ocean.
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No way.
Label the top left corner as white, then the adjacent ones as the opposite color.
White without white black and white.
Black and white black and white black.
White, black, white, black and white.
Black and white black and white black.
White, black, white, black and white.
Excluding the point where you can't go, there are 13 white blocks and 11 black blocks. If there is a continuous line, it is one white and one black (because it cannot be walked diagonally), so it is impossible to have two more pieces of one color than the other.
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From left to bottom, right to right, and so on, and then the third vertical is easy.
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Use 丨 for all, and use horizontal for the bottom row.
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The title doesn't say that you can't get out of the range of this square......Isn't it simple?
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The problem lies in the problem that 30 yuan is refunded 25 yuan is equal to 5 yuan, and there is nothing wrong with 25 yuan a night, but the 5 yuan returned by the boss is actually calculated from 26 yuan, because the first 25 yuan has been used as accommodation fee in the hands of Lao Yinqingban, and the 2 yuan taken by the waiter is an obstacle to a trap. Suppose we think of the 30 yuan accommodation fee as 30 small bills of one yuan, and label each dollar with the 1st, 2nd, 3rd ......Then it is not difficult to find: Reasoning 1:
Because it is 25 yuan a night, the boss has already taken away the one-dollar bills numbered 1st to 25th, and the boss returned the 26th, 27th, 28th, 29th, and 30th bills to the three guests, and there are a total of 5 one-dollar bills, so it is 5 yuan. The assumption that 3 x 9 = 27 yuan is not valid, and it is 25 yuan a night, not 24 yuan, which means that it is not an average of 8 yuan per person per night, but one yuan per person per night. Reasoning 2:
In this way, we will not include the 2 yuan that was later stolen by the waiter so as not to confuse the public. It can be concluded that the money that was returned to the previous guest of Sanzao Nai after the introduction of "Reasoning 1" was actually the money after the 26th yuan, so among these three people, the actual expenditure was yuan per person.
Reasoning 3: Suppose the average expenditure of three people is 8 yuan, 3x8 = 24, the boss quits 25-24 = 1 yuan, and the waiter takes 2 yuan. The other 3 yuan is divided into 1 yuan per person equally, 1 + 2 = 3, 24 + 3 = 27, 3 * 1 = 3, 27 + 3 = 30.
Finally, I will tell you that the dollar went there, because the money that the boss withdrew from was 5 pieces of one dollar (5 yuan) starting from the number 26 yuan in "Reasoning 1", and finally this mysterious one yuan actually fell into the hands of the boss. Summary: What you see is actually an illusion that is deceived by the title, and it is natural to think that the three people spent 25 yuan, so the money returned should also be calculated from the 25 yuan in the text message, who knows, the trap is here, the money is not calculated from the 25th acre, but the 26th!
Counting from 25 sheets will directly lead to people's thinking range being blinded, everyone thinks that 30-25 = 5, if you want to count from the 25th sheet, it is actually the 25th, 26th, 27th, 28th, 29th, 30th, and here is a full 6 yuan, our habitual thinking in the text blinded us to lose the "25th" yuan.
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If you think about it like this, since the waiter returned one yuan each, it means that the three people spent a total of 27 yuan, of which 25 yuan went to the boss and the other two yuan went to the waiter.
3*9=27 actually includes the two yuan of the waiter, 27 yuan makes them spend, plus the 3 yuan returned to them by the waiter, which is 30
Brain teasers are a puzzle game.
A total of 10 lines:
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