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A math problem?
Three people went to stay,

One night in 30 yuan.

Three people each paid 10 to make up 30 yuan and gave it to the boss.

Later, the boss said that it was enough to give 25 yuan a discount today.

Take out 5 yuan and ask the waiter to return it to them.

The waiter secretly hid 2 yuan,

Then,

Divide the remaining 3 yuan money among three people,

Everyone gets 1 yuan.

In this way,

Everyone handed in 10 yuan.

Now it's back to 1 yuan,

Namely 10- 1=9,

Everyone only spent 9 yuan's money,

Three people each, 9 yuan,

3×9 = 27 yuan+2 yuan hidden by the waiter =29 yuan,

Where's the other dollar?

Answer:

30 yuan -25 yuan = 3 people in 5 yuan actually turned over to 8.3 yuan (3 cycles) =25 yuan.

The waiter took 2 yuan +3 people and each got 1 yuan +25 yuan =30 yuan.

3 people 1 people get130 yuan, 0 yuan.

The boss returned 5 yuan, which was given to the waiter. At this time, three people actually took it out, each with 8.33 yuan.

The waiter gave it back to 3 yuan. At this time, everyone actually took out 9.33 yuan.

9.3X3=28 28+2=30

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