Simple interest · solved example
Find the simple interest on Rs 8,000 at 5% per annum for 3 years.
- 1000
- 1200Correct
- 1500
- 800
Solution
Simple interest is principal x rate x time / 100 = 8000 x 5 x 3 / 100 = 1200.
SSC | SSC CHSL
SSC CHSL sets 55 Quantitative Aptitude questions for 140 marks across 2 stages, so it is worth planning your preparation around the topics below.
Speed decides this section. The arithmetic and data-interpretation sets are where the marks are, so the priority is a reliable method and quick calculation rather than exotic shortcuts. Lock down tables, squares and reciprocals, then drill data interpretation until reading the set is faster than solving it.
How much Quantitative Aptitude is worth in each SSC CHSL stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Tier I (Computer Based Examination) | 25 | 50 | — | 25% |
| Tier II, Paper I (Computer Based Examination) | 30 | 90 | — | 22% |
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
Written to the SSC CHSL pattern, with the answer key and the method behind it — a look at how the section is actually set before you drill the full topic sets.
Simple interest · solved example
Find the simple interest on Rs 8,000 at 5% per annum for 3 years.
Solution
Simple interest is principal x rate x time / 100 = 8000 x 5 x 3 / 100 = 1200.
Percentage · solved example
The price of sugar rises by 25%. By what percent must a family cut its consumption so that the money spent on sugar stays the same?
Solution
If price rises by r%, consumption must fall by r / (100 + r) x 100 percent to hold spending fixed. Here that is 25 / 125 x 100 = 20%.
Ratio and ages · solved example
The ages of A and B are in the ratio 3 : 5 and their ages add up to 48 years. What is B's age?
Solution
The total has 3 + 5 = 8 parts, and 48 / 8 = 6 years per part. B has 5 parts, so B's age is 5 x 6 = 30 years.
Simplification · solved example
Solve: 8 + 4 × 7
Solution
By BODMAS, multiply first: 4 × 7 = 28, then 8 + 28 = 36.
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Untimed drills with the method shown after every question — the step between learning a topic and sitting it under a clock.
Calculation speed
195 questions, instant feedback
Data interpretation
105 questions, instant feedback
Mensuration, mixtures and counting
87 questions, instant feedback
Number series
93 questions, instant feedback
Percentage, profit and averages
123 questions, instant feedback
Quadratic equations
69 questions, instant feedback
Interest, ratio and partnership
117 questions, instant feedback
Simplification and approximation
108 questions, instant feedback
Time, speed, distance and work
108 questions, instant feedback
Number system: LCM, HCF, remainders and divisibility without the guesswork
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Ratio and proportion: the one skill behind partnership, mixtures and ages
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Mensuration, mixtures and counting: the results worth memorising
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Percentage, profit and averages: one idea in three disguises
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Time, speed, distance and work: everything is one ratio
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Quantitative Aptitude shows up in every SSC CHSL mock test, in the same interface, with sectional locking and negative marking.
SSC CHSL 2026 cycle sets 55 Quantitative Aptitude questions for 140 marks, split across 25 in the Tier I (Computer Based Examination) and 30 in the Tier II, Paper I (Computer Based Examination).
Yes. SSC CHSL deducts one fourth of a mark for each wrong answer, Quantitative Aptitude included, so unsure guesses cost you. 0.50 marks (a quarter of the two marks a question carries) are deducted for each wrong answer. Unanswered questions carry no penalty.
The SSC CHSL syllabus lists Number system and simplification, Percentage, ratio and averages, Profit, loss and discount, Simple and compound interest, Time and work, time, speed and distance, Mensuration and geometry and more. Weight your revision towards the ones you are weakest on and confirm the emphasis against the paper analysis for recent cycles.
Every Quantitative Aptitude question on this site is free and written to the exam pattern. Use the topic drills for instant-feedback practice, the daily quiz to keep the section warm, and the SSC CHSL mock tests to sit it under a real clock with negative marking.