When doing math problems, sometimes we can think from the opposite side of the problem, and doing the opposite can often achieve unexpected results. A businessman encountered such a problem:
The businessman wants to store jewels worth several hundred thousand yuan in the vault, but the vault has to pay the rent of 1 ten thousand dollars every year. Is there any good way to save money and keep jewelry? This problem should be considered with reverse thinking: jewelry is a kind of value-preserving product, but businessmen use reverse thinking to change the original idea of saving jewelry into borrowing a dollar from the bank first and "saving" all the jewelry in the bank as collateral. In this way, you only need to pay 6 cents interest to the bank a year, and you can also achieve the purpose of preserving the value of jewelry. Businessmen's shrewdness is evident, as is the charm of reverse thinking.
The charm of reverse thinking doesn't stop there. The following two stories also use reverse thinking to solve problems skillfully.
The first story happened in War of Resistance against Japanese Aggression's time. A group of devils were beaten out of the water by the Eighth Route Army and had to hide in a county town and wait for the arrival of rescue troops. The Eighth Route Army outside the city is in a hurry and must capture the county seat as soon as possible. In order to find out the enemy's situation, the Eighth Route Army sent a small scout to sneak into the county seat to inquire about the situation.
However, the Japanese are well prepared. They have blocked the county seat, and the only access to the outside world is a bridge. There is a sentry in the middle of the bridge, where a guard guards. Small scouts observed for a long time and found that the guards of 1 should observe the river for a while and guard the bridge deck for a while. He couldn't see the situation on the bridge when he observed the river. As long as someone comes out of the county seat, the guards will immediately drive him back. On the contrary, if someone wants to enter the city from the outside, the guards will also drive him away! Scouts estimate that it will take one minute to cross the bridge at the earliest, while guards always observe the river for half a minute and guard the bridge for half a minute. Therefore, when the little scout walks halfway to the bridge, he will be discovered by the devil.
The little scout racked his brains and finally came up with a clever plan. He climbed up the bridge quietly while the Japanese were guarding the river and walked to the gate of the county seat. About half a minute later, he turned and walked out. This happened to be discovered by the devil, thinking that he was going out of the city, and quickly called him back to the city.
The second story tells that three children came to play football in front of the retired teacher Shaq, and the noise gave Shaq a headache. He once asked these children to leave, but those naughty children ignored him at all. One day, Shaq found the children and smiled and said to them, "I'm glad to see you having such a good time." If you come to play football every day, I will give each of you a dollar every day. " The three children were very happy. They come to Shaq's house every day to play football hard. Shaq kept his promise and gave them three yuan a day.
Unexpectedly, a few days later, Shaq said sadly, "Son, my salary has been reduced, and I can only give 50 cents to everyone in the future." Although the children were unhappy, they accepted it. A few days later, Shaq found them again and said, "Sorry, children, my salary is gone. I can't give you money in the future. " "What? You want us to play football for you for free? ! We don't do such stupid things! " Since then, the three children have never come to Shaq's house to play football.
To achieve the same goal, reverse thinking is sometimes much more convenient and effective than normal thinking. "Reverse thinking" is really amazing, and "Mathematics" is really mysterious!
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