Quizzes
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Logarithms
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Quadratic Equation
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Probability
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H.C.F and L.C.M
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Number Systems
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Averages
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Alligation
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Profit and Loss
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Ratio and proportion
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Interest
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Functions
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Alligation or Mixture
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Discount
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Clocks and Calendar
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Square Root and Cube Root
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Coding-Decoding
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Number-Ranking-Time Sequence
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Percentage
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Volume and Surface Area
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Boats and Streams
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Partnership
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Height and Distance
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Area
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Profit and Loss
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Problems on Ages
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Decimal Fraction
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Average
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Pipes and Cistern
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Permutation and Combination
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Problems on H.C.F and L.C.M
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Compound Interest
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Probability
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Chain Rule
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Stocks and Shares
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Banker’s Discount
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Time and Distance
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Simple Interest
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Problems on Trains
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Time and Work
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Videos on Chain Rule
Problems on Chain rule – Part 1
Problems on Chain rule – Part 2
- 1) Direct Proportion: Any two quantities are said to be directly proportional if on the increase of one quantity, the other quantity increases and vice-versa.
- Example: Cost is directly proportional to the number of objects cast ∝ Number of objects increases (↑) Cost (↑)
- Example: Work done is directly proportional to the number of working work done ∝ Number of working men Number of men increase (↑) Work done (↑)
- Indirect Proportion: Any two quantities are said to be indirectly proportional, if on the increase of one quantity, the other quantity decreases and vice-versa.
- Example: If the speed of the car is increased, then the time required to cover the distance decreases. Speed of car (↑) Time required decreases (↓)
- Example: Time is taken to finish work increases if the number of men decreases. Time (↑) Number of men (↓)