CSAT

CSAT is Prelims Paper II — qualifying at 33%, but a paper that ends candidacies every year when it is assumed to be easy. It tests comprehension, logical reasoning, basic numeracy and decision-making.
The section that actually decides outcomes is comprehension, not mathematics, because it carries the most marks and rewards careful reading over speed. The quantitative half needs a small set of topics done reliably rather than a wide syllabus done shakily. Two full timed papers will tell you more about your standing than a month of topic-wise practice.
Topic notes, worked examples, formula sheets and practice sets are all collected here.