CSAT is rarely lost because the mathematics is hard. It is lost because 40+ complex questions are packed into two hours under a ticking negative-marking clock.
The Aptitude Handbook: Formulae Under One Roof is a compact revision compendium of Quantitative Aptitude and Reasoning, written especially for UPSC CSAT. It's built for the last weeks before the exam, when you need every formula, shortcut and trap in one place rather than spread across a dozen books.
Why aspirants need this compendium:
Audited First-Principles Logic: No brittle, unreliable tricks. Every shortcut is checked mathematically so it still works when the question stem is twisted.
30-Second Eliminators: Replace 3-minute algebraic substitutions with clean cross-products and modular congruences that rule out wrong options fast.
UPSC Trap Alerts: Learn to spot non-zero remainder splits, century leap-year exceptions and relative-velocity traps before negative marks cost you a rank.
9 High-Yield Modules: The topics that come up again and again, condensed for quick revision.
Useful for:
Civil Services & State PSCs: UPSC CSE (CSAT), APPSC (Groups 1–4), TGPSC (Groups 1–4) and other State PSCs
Central Recruitment & Railways: SSC CGL, CHSL, MTS, RRB NTPC, RRB Group D
Banking, Insurance & Regulatory: IBPS PO/Clerk, SBI PO/Clerk, LIC AAO, RBI Grade B
Engineering & Technical Aptitude: GATE, ESE, ISRO, DRDO, PSU and other technical exams
Power Utilities: Assistant Engineer (AE) exams of state DISCOMs, TRANSCOs and GENCOs