Let's talk about the difficulty first. Generally speaking, Math III is a little more difficult, because the test content of Math III is the same, which requires a higher degree of mastery. For example, the difference equations are not tested in mathematics, especially linear algebra and probability theory.

But this does not mean that it is absolute. In a few cases, mathematics has three noes, but it is much more difficult.

Secondly, when it comes to getting high marks, Math 4 is generally easy to get high marks, because there are fewer review contents, and basic questions account for the majority.

Finally, I would like to remind you that you should choose the school and major first, and then take the math exam, not the other way around. It should be noted that it is easy for you to get high marks in Math 4, so it is easy for everyone. Therefore, difficulty and difficulty should not be the basis of your choice.