Traditional Culture Encyclopedia - Hotel franchise - Paradox problem, three people went to a hotel to stay and opened a room. The room is thirty yuan a night, and three people each take out ten yuan, which is just right.

Paradox problem, three people went to a hotel to stay and opened a room. The room is thirty yuan a night, and three people each take out ten yuan, which is just right.

27+2 is wrong. Three people each 9 yuan, a ***27 yuan, actually paid the shopkeeper 25 yuan, 27-25=2, and the remaining two yuan was hidden by the waiter. First of all, the error is that 27 already contains these two yuan, so it cannot be added. It should be 27+3=30 yuan. I hope to adopt.