其实我知道这个问题在网上流传许久，只是有点好奇出题人到底是谁？
何以出一道模棱两可可说是没有答案的问题给学生作答呢？
大家一块儿来讨论讨论吧！
内容如下～
有个顾客到王老板的店里买了件礼物。
这礼物成本是18元，标价是21元。
顾客掏出100元付钱，当时王老板没有零钱，
于是用那100元向街坊换了100元的零钱，找给顾客79元。
后来街坊发现那100元是假钞，王老板无奈还了街坊100元。
* 请问王老板在这次交易中到底损失了多少钱??
（嘿！别小看这小小的问题，这可能会考倒你喔！）
好啦！问题来了，请好好思考一下吧！
For the benefit of those who find the above to be alien hieroglyphics,
Primary School maths
question that 99 out of 100 uni students answer wrongly.
A young man wants to buy a gift at Mr. Wang's shop.
The item's cost price is $18, while the selling price is $21.
The young man pays with a $100 bill, but Mr. Wang has no change.
Mr. Wang then goes to a nearby shop to change $100 of small notes, and returns the young man $79.
Subsequently, the nearby shop finds the $100 to be counterfeit, so Mr. Wang has to return the shop $100.
* How much did Mr Wang lose?
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