Quantitative Aptitude SSC GD, SSC quantitative aptitude Free access now

Compound Interest for SSC GD | Concepts & Practice | SSC GD Quantitative Aptitude

Build Compound Interest accuracy for SSC GD with concept clarity, key relations, exam-speed methods and approved practice.

Tailored for SSC GD Quantitative Aptitude. 4 active practice questions. Related topics: Percentage, Profit and Loss, Simple Interest.

SSC GD approach: For SSC GD, keep this topic practical and direct. The target is to recognise familiar patterns quickly and apply the shortest reliable method without creating extra working.

What to master: Master the basic rule, repeat high-frequency patterns, and practise small timed sets where the same concept appears in more than one surface form.

SSC GD focus:

Keep the method simple and dependable for SSC GD, with emphasis on fast recognition and basic exam-ready accuracy.

Attempt strategy: For SSC GD, prefer the shortest clear method, avoid over-solving, and practise recognising familiar patterns without sacrificing accuracy.

Revision path: GD revision: core rule -> easy pattern -> speed drill -> quick correction.

SSC GD exam emphasis for Compound Interest

GD emphasis: clarity, rapid recognition, direct working, and dependable accuracy.

Most important error to avoid

Typical GD loss comes from overthinking a simple pattern, skipping a basic check, or using a longer process when a direct rule would solve the question.

SSC GD Compound Interest — SSC GD study plan

Connect Compound Interest to the objective-question workflow used in SSC GD: recognise the concept, choose a clean method, solve, and verify.

How to practise this topic

Use a short progression from direct examples to mixed timed practice, increasing complexity only after accuracy is stable.

Mistakes to remove before the next set

Classify each error as concept, reading, calculation, grammar, or time-management related and correct the exact cause before repeating the set.

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4 practice questions

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Learn the shortcut

Understand the fastest pattern for this topic before you attempt full MCQs.

Avoid common traps

See where students commonly lose marks so you can eliminate bad options earlier.

Solve faster in exam

Apply one practical method before attempting MCQs and cut down hesitation.

Summary Formula Tricks Mistakes Solved Example Practice FAQ

Compound Interest revision for SSC GD: understand the base rule, apply the correct formula or relation, check common traps, then practise with approved questions.

Compound Interest is calculated on the updated amount after each compounding period, so the base changes over time. Treat growth as a multiplier rather than repeatedly calculating interest separately.

SSC GD focus: Solve the core method first, then use the approved practice questions on this page to build exam-speed accuracy.

Compound Interest revision rule: concept → formula/relation → one worked example → timed practice → error review.

Core concept
Key formula/relation
Common trap
Approved practice

A = P(1+r/100)^n
CI = A-P
For depreciation: A=P(1-r/100)^n

For two years at the same rate, multiplying by the growth factor twice is usually faster and less error-prone.

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SSC GD: Practise this concept with SSC GD-style questions.

Solve topic-wise questions, measure accuracy, identify weak areas, and prepare for mock tests faster with a sharper revision flow.

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Practice Questions Login for free progress tracking

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You can start learning here right away, explore formulas and tricks, and use the current limited practice flow before premium tools arrive.

Read the exact requirement before choosing a shortcut.
Keep units, signs and percentage bases consistent.
Use the final few seconds to verify direction and magnitude.

Using a memorised shortcut without checking its condition.
Skipping unit or base conversion.
Doing long arithmetic before identifying the underlying relation.

SSC GD practice example: Find compound interest on Rs. 1000 at 10% per annum for 2 years. Amount = 1000 × 1.1² = Rs. 1210, so compound interest = Rs. 210.

Find the amount on Rs. 10000 at 10% per annum for 1 year, compounded half-yearly.
Find the compound interest on Rs. 10000 at 20% per annum for 1 year, compounded half-yearly.
A sum amounts to Rs. 8820 in 2 years at 5% per annum, compounded annually. Find the principal.

Learn the shortcut first

Shortcut before you solve

Compound Interest becomes straightforward once compounding frequency, rate and time are identified.

Faster solving steps

Use this 4-step method before solving to keep your thinking fast and repeatable.

Step 1 Identify relation

Spot the pattern, relationship, or core idea first.

Step 2 Apply same pattern

Use the same rule instead of re-solving from scratch.

Step 3 Eliminate wrong options

Remove confusing choices before comparing the last few.

Step 4 Confirm final answer

Pick the option that matches the shortcut most cleanly.

Practice Questions

Start with the first 10 questions free, then unlock the rest with premium

Now apply the trick on real questions

Use the shortcut above before solving these questions

Use A = P(1 + R/100)^T for annual compounding, then CI = A - P.

Tip: Compound interest is earned on principal plus previously accumulated interest.

Step 1

Amount = 1000 x (1.10)^2 = Rs. 1210.

Step 2

Compound interest = 1210 - 1000 = Rs. 210.

Rule

For annual compounding, A = P(1 + R/100)^T and CI = A - P.

3-second trick

For two years at rate r%, think year-by-year growth or square the growth factor.

Trap to avoid

Do not use PRT/100 when the question asks for compound interest.

Correct answer

Rs. 210

Thinking path

First-year amount becomes Rs. 1100.
Second-year interest is calculated on Rs. 1100.
Final amount is Rs. 1210.
CI is Rs. 210.

Final answer: Rs. 210

Why this is fast: Using the growth factor avoids calculating each year's interest separately.

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Q1 Medium

A sum amounts to Rs. 13310 in 3 years at 10% per annum, compounded annually. Find the principal.

Concept type: Compound growth on accumulated amount Shortcut used: Use A = P(1 + R/100)^T for annual compounding, then CI = A - P. Quick hint: Compound interest is earned on principal plus previously accumulated interest.

Quick idea: The principal is Rs. 10000.

Solve

Q2 Medium

A sum amounts to Rs. 8820 in 2 years at 5% per annum, compounded annually. Find the principal.

Quick idea: The principal is Rs. 8000.

Solve

Q3 Medium

Find the compound interest on Rs. 10000 at 20% per annum for 1 year, compounded half-yearly.

Quick idea: The compound interest is Rs. 2100.

Solve

Q4 Medium

Find the amount on Rs. 10000 at 10% per annum for 1 year, compounded half-yearly.

Quick idea: The amount is Rs. 11025.

Solve

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