In the Olympic math problem, in the problem of changing an empty bottle for soda, the final answer is to borrow another bottle from the merchant. Is this reasonable?
Yes, look at the first sentence carefully. Merchants recycle empty bottles for activities, so for merchants, they are willing to lend you a good bottle to recycle your empty bottles, because for merchants, although there is no fluctuation in value, they recycle more empty bottles. Without this premise, it is not rigorous and advisable to borrow a bottle of intact beverage.