Mathematics and IQ (mental ability) for Lok Sewa: number series, letter series, coding and decoding, percentages, ratio, profit and loss, time and work, averages, simple and compound interest, and reasoning puzzles. Each lesson explains the method step by step with worked examples, then gives practice questions with answers. Speed matters in the IQ section, so learn the method first, then practise with timed quizzes.
🎯 Practise Maths Quiz →
Exam notes on simple and compound interest: key terms, the SI formula, finding P, T or R, doubling time, months and days, yearly and half-yearly compounding and the CI minus SI shortcut, with a full quiz.
Exam notes on number series, letter series and coding-decoding for the mental ability paper, with common patterns, an alphabet positions table, a step-by-step method and a full quiz at the end.
Exam notes on profit and loss: cost price, selling price, marked price, profit and loss percent, discount, successive discounts and VAT, with worked rupee examples and a full quiz at the end.
Easy exam notes on percentage: conversions, percent of a number, percent increase and decrease, successive change, population and price problems and shortcuts, with a full quiz at the end.
