About brain teasers in business?

Three people went to the hotel and gave the boss money, 30 yuan. The boss paid back 5 yuan because he was in a good mood. The waiter took 2 yuan on the way to deliver the money, and three people each paid 1 yuan. This is equivalent to everyone giving it to 9 yuan, plus the waiters 2 yuan and 29 yuan. Where did the other yuan go? Answer: 27+2 makes no sense. These two figures simply don't add up. There is a simple reason. What is 27? Is the sum of the actual room rate in 25 yuan and the 2 yuan hidden by the waiter. It already contains 2, so adding 2 is meaningless.

The correct algorithm: the actual room rate is 25 yuan, the waiter hides 2 yuan, and a 27 yuan; "Give the remaining 3 yuan money to those three people, each 1 yuan", 27+3=30, which is the money paid by the first three people. In this way, there is no contradiction. This topic is to guide you to get to the bottom of "3×9 = 27 yuan+2 yuan hidden by the waiter =29 yuan". If you think about it from this aspect, you won't get every answer of 10 yuan, and then everyone will return to 1 yuan, that is, everyone 9 yuan 9 yuan X 3 = 27 yuan's boss says 25 yuan is enough, and the extra 2 yuan is just right.