The description of winning a prize is to win a prize or honor, followed by 4 and 2, indicating the winning number, but on this basis, it is said that 5 is added, indicating that it is 4-2+5=7, so it is the number 7.

The key to compound interest lies in time and rate of return, so we should invest young and invest in high-return assets to get the maximum return.

In addition, it should be noted that Charles Munger mentioned probability and permutation and combination many times in his discussion. In fact, the knowledge of probability theory in our high school has covered the knowledge of probability that Munger said. We often use probability theory in our daily life and investment process.

Mathematics learning skills

Listening carefully in class is an important link to lay a good foundation of mathematics, and it is also the fundamental way to firmly grasp basic knowledge. When solving problems, students can try to use different methods, such as hypothesis method, special value method, whole method and so on.

Deeply understand the knowledge points, read the textbooks carefully, listen carefully, and combine understanding with practice. In addition, students should listen carefully. On the one hand, they can better grasp the context of knowledge, deepen their understanding and learn how teachers analyze and solve problems.