12 mind maps
Chapter 10 Pass English Medium Competitive Mathematics · Arithmetic Average What an average means, its properties, averages of series, weighted averages, changes in an average, average age and average speed — with solved examples and 100+ practice questions. Open map Chapter 11 English Medium Competitive Mathematics · Arithmetic Percentage Percentage from the very beginning: fractions, decimals and percent, increase and decrease, successive changes, population, elections, mixtures and hard questions — with solved examples and questions to try yourself. Open map Chapter 12 Pass English Medium Competitive Mathematics · Arithmetic Profit and Loss Cost price, selling price, profit and loss per cent, two-article deals, dishonest dealers, mixtures and chains of sales — with solved examples and 100+ practice questions. Open map Chapter 13 Pass English Medium Competitive Mathematics · Arithmetic Discount Marked price and discount, successive discounts and their single equivalent, profit and loss with discounts, “buy one get one free” and comparing offers — with solved examples and 100+ practice questions. Open map Chapter 14 Pass English Medium Competitive Mathematics · Arithmetic Simple Interest Principal, rate, time and amount; the simple-interest formula, days and months as time, a sum becoming $n$ times, payment by instalments and the gain from borrowing and lending — with solved examples and 100+ practice questions. Open map Chapter 15 Pass English Medium Competitive Mathematics · Arithmetic Compound Interest The idea of compound interest, the amount formula, half-yearly and quarterly compounding, different rates, the CI–SI difference, instalments and population growth and decay — with solved examples and 100+ practice questions. Open map Chapter 16 Pass English Medium Competitive Mathematics · Arithmetic True Discount and Banker’s Discount Present worth, sum due, true discount, banker’s discount and banker’s gain — formulas, relations and solved examples with 100+ practice questions. Open map Chapter 17 Pass English Medium Competitive Mathematics · Arithmetic Ratio and Proportion Kinds of ratio, comparing ratios, sharing a sum, three-term ratios, proportion, third, fourth and mean proportionals and the practical ratio questions — with solved examples and 100+ practice questions. Open map Chapter 18 Pass English Medium Competitive Mathematics · Arithmetic Mixture and Alligation Mean price, the alligation (cross-subtraction) method, finding quantities, alligation on per cents and profits, repeated draw-and-refill, changing ratios and mixing two vessels — with solved examples and 100+ practice questions. Open map Chapter 19 Pass English Medium Competitive Mathematics · Arithmetic Partnership Simple and compound partnership, the capital × time principle, joining or leaving later, working and sleeping partners, sharing rent — with solved examples and 100+ practice questions. Open map Chapter 20 Pass English Medium Competitive Mathematics · Arithmetic Unitary Method Going through the value of one unit — direct and inverse proportion, the men–days–hours chain rule, wages, rations and speed questions — with solved examples and 100+ practice questions. Open map Chapter 21 Pass English Medium Competitive Mathematics · Arithmetic Problems Based on Ages The constant age difference, “years ago / hence” ratios, multiple-type questions, average ages and timeline puzzles — with solved examples and 100+ practice questions. Open map
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