Aptitude for Placements
The six quantitative topics that fill most placement aptitude rounds
6 lessons · 1.5 hours of reading
· Beginner · 3 free
Percentages, ratio, averages, time-speed-distance, time-and-work and profit-loss, taught as methods you can use under time pressure. Every lesson ends with three problems solved with the arithmetic shown in full.
Lessons
1
Percentages and the shortcuts
The fraction table, successive change, and three fully worked problems.
2
Ratio, proportion and partnership
The k-method, cross multiplication, and how profit is split between partners.
3
Averages, alligation and mixtures
The sum-count idea, the alligation cross, and the replacement formula.
4
Time, speed, distance, trains and boats
Unit conversion, relative speed, and the two question types that always appear.
5
Time and work with the men-days method
The LCM trick that removes fractions, and the men-days proportion.
6
Profit, loss and discount
Cost price, marked price, successive discounts, and the false-profit trap.
Lessons 4 to 6 need a Pro pass
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