Pick a book. Inside each sheet you'll find every numerical formula chapter-wise, with variables defined. No worked examples — pure reference for last-minute revision.
National income aggregates, value-added method, Fisher's equation, money multiplier, MPC/MPS, investment multiplier, deficit formulas, PPP, BoP — all in one place.
Head Count Ratio, Sen's Index, LFPR, WPR, Unemployment Rate, IMR, MMR, HDI — every numerical the CBSE syllabus tests, organised by chapter.