I remember a question about staying in a hotel, asking where the dollar went, looking for the original question, waiting online, urgent!

Three people went to stay in a hotel. It was originally 30 yuan, each person 10 yuan. As a result, the hotel gave a discount, 25 yuan was enough, and 5 yuan was left. But the waiter deducted two yuan, and one person gave them one, which became nine yuan per person. But if this is calculated, 3× 9+2 = 29, where is the dollar? I think so: The problem is that 30 yuan's withdrawal from 25 yuan equals 5 yuan, and one night in 20 yuan. Suppose we treat this 30 yuan accommodation fee as a small bill of 30 Zhang Yiyuan, and mark each dollar with 1, second and third ... Then it is not difficult to find out: reasoning 1: Because it was a night in 25 yuan, the boss had taken away the one-dollar bill numbered 1, and by the 25th, the boss actually took the 26th bill. The hypothesis that 3×9 = 27 yuan is not valid. One night is 25 yuan, not 24 yuan. That is 8.33 yuan per night instead of the average 8 yuan. Reasoning 2: In this way, we excluded the 2 yuan money that was later swallowed by the waiter, so as not to confuse people. It can be concluded that the money returned to the three tenants after "reasoning 1" is actually the money after 26 yuan, so the actual expenditure between these three people is 9.33 yuan per person. Inference 3: Suppose that three people each spend an average of 8 yuan, 3×8 = 24, the boss returns 25-24= 1 yuan, and the waiter takes 2 yuan. In addition, the average score of extra 3 yuan is 1 yuan, 1+2=3, 24+3=27, 3* 1=3, 27+3=30. Finally, I'll tell you where the money went, because the money that the boss quit started with the number 26 yuan (5 yuan) in Zhang Yiyuan's "Reasoning 1", and finally this mysterious dollar actually fell into the boss's hand. Summary: What you see is actually an illusion blinded by the topic. Naturally, it is believed that three people spent money in 25 yuan, so the money returned should also be counted from 25 yuan in the text message. Who knows, the trap is here, the money is not counted from page 25, but from page 26! Counting from 25 pictures will directly lead to blindness in people's thinking range. Everyone thinks 30-25=5. If you count from the 25th picture, it is actually the 25th, 26th, 27th, 28th, 29th and 30th pictures, but this is the whole of 6 yuan. Our habitual thinking makes us unable to see the 25th picture under the blind of words.

Please accept it, thank you!