1. First of all, it's not your choice whether to take the math test for graduate students or not. It depends on what major you apply for, such as economics. Just check the professional catalogue of the school.

2. If you choose a major, it depends on your math foundation and confidence in preparing for the exam. It doesn't matter if math is not bad. If it is not good, you can only choose to avoid it.

3. Actually, the choice of major mainly depends on the foundation and interest. The most difficult thing to choose is the school that matches the results. Come on!