On this day, it was raining cats and dogs outside the window, and the distant scenery was hazy. Raindrops beat the earth, causing ripples in circles. I sat by the window, thinking about a math problem: country A and country B each have their own currencies, and the currency exchange between the two countries is very interesting. In country A, 2 yuan in country A equals 3 yuan in country B; In country B, 2 yuan in country B is equal to 3 yuan in country A. There is no limit to the amount of each exchange, but a handling fee of 16 yuan (any national currency is acceptable) will be paid after each exchange. A clever doctor, now in country A, whose currency is only 160 yuan, wants to go back and forth between country A and country B and increase the money to more than 1000 yuan by changing the currency (both currencies are acceptable). So, how many times does he have to cross the border at least? Now, I've always had a good IQ, and it's no use brooding. It's still raining. I turned to my books and notes, but I couldn't find any hints.
I rubbed my temples and frowned. Suddenly, I had a brainwave: "That's right! If you can't use arithmetic, use the whole line of the equation! " However, which one is unknown? I can't help but get lost in thought again. What is the currency of country A? No ... by the way, suppose we have to cross the border at least x times. I stood up with excitement. Unexpectedly, this problem is too difficult and the equation is not good. I bite my pen for a while and hold my head up for a while. Just when I was puzzled, I suddenly remembered what my teacher had taught me. When I think of a new solution, I can't help smiling and working hard. At last, the answer came out: he had to cross the border at least five times! Outside the window, the rain stopped, and Sun Dad's smiling face appeared again.
I finally overcame the difficulties and understood a truth: the biggest difference between winners and losers lies in their attitude towards difficulties and whether they can overcome them. When difficulties come, successful people are confident, optimistic, brave and down-to-earth. Losers complain, are depressed, are blocked by difficulties, and cannot reach the other side of success.