Do you know where one yuan went to the math problem that caused great repercussions in the interview in New Zealand?

1. Each person only spent 9 yuan, three people each 9 yuan, and one ***3*9=27 yuan.

27 yuan equals the boss's 25 yuan and the waiter's 2 yuan.

Namely: 3 * 9 = 25+2; Not the title: 3*9+2=30.

2. consider the money in everyone's hands now; Three people: 3* 1 yuan; Attendant: 2 yuan; Boss: 25 yuan.

That is 3 *1+2+25 = 30; Instead of adding old money to everyone now.

Summary: The waiter didn't pay the 2 yuan he hid; So grasp, whoever pays will take it. The total is still the same.