I just read the title and thought it was amazing, but after careful analysis, I found a flaw. Three people each paid 10 yuan, took the bus to 30 yuan, and then returned to 5 yuan, which means that the boss only accepted 25 yuan. The waiter stole 2 yuan and gave it back to 3 yuan (per person 1 yuan), which means that each of the three people only paid 9 yuan. Three people and one * * * earned 27 yuan. Come to think of it, whose is this 27 yuan? In two parts, the boss took 25 yuan and the waiter stole 2 yuan. In other words, when three people take the bus to 27 yuan, it contains the money stolen by the waiter from 2 yuan. Therefore, the title "3 times 9 equals 27, plus 2 yuan secretly taken away by the waiter, only 29, less 1 yuan" is pure bluff. In fact, not a penny is missing. Three people finally paid 9 yuan, ***27 yuan, this 27 yuan, the boss took 25 yuan, the waiter took 2 yuan and gave it back to three people, 3 yuan. 30 yuan = 25 yuan received by the boss+2 yuan stolen by the waiter+3 yuan returned. According to the title, 27 yuan+the waiter stole 2 yuan =29 yuan. 27 yuan, the boss took 25 yuan and the waiter stole 2 yuan. ) So it becomes "25 yuan from the boss+2 yuan from the waiter+2 yuan from the waiter =29 yuan". That is to say, when calculating the amount of money in the last question, the 27 yuan and 2 yuan stolen by the waiter are completely wrong, and the returned 27 yuan and 3 yuan should be used correctly.