1. Find the compound interest on Rs 8000 at 10% per annum for 2 years.
- ARs 1600
- BRs 1680
- CRs 1700
- DRs 1750
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Answer: B
Amount=8000×(1.1)²=9680. CI=9680-8000=1680.
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Compound Interest — Mathematics Questions & Practice
Practise 214 Compound Interest questions from Mathematics for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.
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Practice questions on Compound Interest — with answers
Try each question first, then open the answer. Explanations are included.
2. Find the amount on Rs 10000 at 5% per annum compound interest for 2 years.
- ARs 10925
- BRs 10975
- CRs 11000
- DRs 11025
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Answer: D
Amount=10000×(1.05)²=11025.
3. What is the compound interest on Rs 15625 at 4% per annum for 2 years?
- ARs 1250
- BRs 1275
- CRs 1300
- DRs 1325
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Answer: B
Amount=15625×(1.04)²=16900. CI=16900-15625=1275.
4. The difference between compound interest and simple interest on Rs 5000 for 2 years at 10% per annum is:
- ARs 40
- BRs 45
- CRs 50
- DRs 55
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Answer: C
For 2 years, CI-SI = P×(R/100)² = 5000×0.01=50.
5. Find the compound interest on Rs 8000 for 1 year at 10% per annum, compounded half-yearly.
- ARs 800
- BRs 810
- CRs 820
- DRs 830
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Answer: C
Half-yearly rate=5%, 2 periods. Amount=8000×(1.05)²=8820. CI=820.
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