CDS 2025 · PYQ · Compound Interest · easy
What is the least number of complete years in which a sum of money put out at 20% compound interest (compounded annually) will be more than doubled?
Answer
The correct answer is C: 4. We need (1.2)^n > 2. (1.2)² = 1.44, (1.2)³ = 1.728, (1.2)⁴ = 2.0736 > 2.
- A.2
- B.3
- C.4✓ Correct
- D.5
We need (1.2)^n > 2. (1.2)² = 1.44, (1.2)³ = 1.728, (1.2)⁴ = 2.0736 > 2. So n = 4 years.
💡
Practice unlimited CDS PYQs + AI-tracked progress on each topic.
Sign up free →More Compound Interest questions
Want more CDS practice?
Free daily 10-Q quiz · adaptive mocks · 49,000+ practice questions (19,000+ verified PYQs) · AI doubt solver in Hindi + English