One of the reasons why the CAT seems tough to test-takers is that the questions are deceptively framed. Test-takers tend to expect questions to be neatly classified — areas, topics, concepts — so that the moment they see the problem they know what to do. But the objective of the test is to not to make things so obvious, not to make a question a matter of plugging numbers into to formulas. There are many questions that on the face of it seem to belong to one area but on closer inspection reveal their origins to be in a different area.