Is maths compulsory for CAT?

Yes, Maths is a very important topic in CAT, and in all the MBA entrance exams for that matter. One cannot avoid this subject when preparing for MBA exams. Also, remember that the Maths (QA) section in CAT is not very tough; the concepts tested are from your high-school level. So, if you simply revise the maths concepts taught during high-school, practice good number of sums, take mocks, you can crack the section without much difficulty.