In mathematics topics, we often use "guessing" to solve problems, especially in topic selection. However, guessing in mathematics is based on certain knowledge and reasoning.

In addition, "guessing" is also used to prove problems and apply problems. For example, to prove a conclusion, we guess that a certain condition holds. In fact, the "guess" here is a hypothesis. Sometimes, this "guess" is a kind of reverse reasoning.

This is a common method in math problems.