Placement & Career Readiness
Quantitative Aptitude
Numerical reasoning for placement tests: number systems, percentages, interest, time/speed/distance, and data interpretation.
Who it's for
Students and recent graduates preparing for campus placement and entrance aptitude tests.
What you'll be able to do
- Solve number system, percentage, profit/loss, and interest problems accurately and quickly
- Apply ratio, proportion, time/speed/distance, and time/work techniques to multi-step word problems
- Read and compute from tabular and chart-style data without common interpretation mistakes
- Combine multiple aptitude techniques to solve mixed, realistic placement-test-style problems
Not started — 12 lessons, no account required.
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Number foundations
Number systems and divisibility, LCM/HCF, and percentages.
- 18 min
Number Systems and Divisibility Rules
How place value works and how to tell whether a number divides evenly by 2 through 11 without doing long division.
- 18 min
LCM and HCF
Finding the largest shared factor and the smallest shared multiple of two or more numbers, and using them to solve real grouping and timing problems.
- 18 min
Percentages and Percentage Change
Converting between fractions, decimals, and percentages, and correctly combining successive percentage increases and decreases.
Applied arithmetic
Profit/loss/discount, simple and compound interest, ratio and mixtures.
- 18 min
Profit, Loss, and Discount
Computing profit and loss percentages from cost and selling price, and working out selling prices after single or successive discounts.
- 22 min
Simple and Compound Interest
Calculating simple interest and compound interest under different compounding frequencies, and understanding why compound interest grows faster.
- 20 min
Ratio, Proportion, and Mixtures
Simplifying ratios, telling direct proportion apart from inverse proportion, and using alligation to work out mixing ratios.
Time, speed & work
Time/speed/distance, time and work, and averages.
- 20 min
Time, Speed, and Distance
Converting speed units, combining speeds for objects moving toward or away from each other, and finding average speed on a round trip.
- 20 min
Time and Work
Modeling work as a daily rate, combining multiple workers' rates, and applying the same idea to pipes filling and draining a tank.
- 18 min
Averages and Weighted Averages
Computing simple averages, tracking how an average shifts when a value is added or removed, and computing weighted averages.
Data and mixed practice
Permutations/combinations/probability, data interpretation, and mixed practice.
- 20 min
Permutations, Combinations, and Basic Probability
Telling arrangement problems apart from selection problems, applying the nPr and nCr formulas, and computing basic probability.
- 20 min
Data Interpretation
Reading structured data given as arrays of labeled values, computing percentages, ratios, and differences from it, and spotting misleading presentations.
- 25 min
Mixed Aptitude Problem Solving
Combining techniques from earlier lessons into realistic multi-step problems, plus honest, general advice for practicing under time pressure.
Where to go next
Optional -- these build well on what you just learned, but any course can come next.