Recently, I saw an interesting question, and it is said that none of the 300 people answered it correctly. The topic is very simple: a boss sells watermelons, the purchase price is 50 yuan, and the price is 70 yuan, but he receives 100 yuan of counterfeit money, and asks him how much money he has lost?

At first glance, it looks very simple, but there are various answers in the comment area, some people say that they lose 80, some people say they lose 100, and some people calculate 180, which is very noisy. This reminds me of the last time I went to the vegetable market to buy vegetables, and the boss miscalculated the account when looking for money, in fact, the reason is similar, that is, it is easy to get dizzy.

In fact, the algorithm is very simple: look at the actual loss

Things for customers: Watermelon (purchase price 50 yuan)Change cash (100-70=30 yuan)Actual loss: 50 30 = 80 yuan

The key: Counterfeit money is a distraction, don't count it as a loss

It's like a little trouble in life, it looks complicated, but it's not difficult to grasp the key.

For example, if you lose your wallet, there are 200 yuan in cash and a bank card, and the loss is 200 yuan, and the bank card can be reissued if it is lost, and you don't need to calculate the value of the card."
The next time you encounter this kind of question, grab the "what is actually given", and don't be dazzled by the numbers~