1. The civil service administrative ability examination is compulsory, but the questions about mathematics account for a small proportion.
2. The administrative ability test mainly looks at many questions, but the questions are not difficult. Some of the problems in mathematical calculation are very simple. You should be able to do them even if you are not good at math, but some of them are difficult. Even if you are good at math, you may not be able to do them in a short time.
3. I suggest you give up too difficult math problems and do the following problems first, because few people can finish all the problems in this exam, so you can still do as many problems as others after giving up a few math problems (because they have less time to do the following problems after finishing math problems).
Second, it doesn't mean that what position you apply for is appropriate, and the recruitment of civil servants is also restricted. If you are British, you can only apply for those positions that recruit English. Other majors can't apply for you, and you can't apply for other majors.
Third, in the future work, it is good to use almost no math. You can use simple addition and multiplication. Chances are, you still don't need to calculate. I tell you, civil servants really don't need to learn anything.