The difference between CI and SI on Rs. 8400 for 2 years at 5% is: MCQ with Answer and Explanation

The difference between CI and SI on Rs. 8400 for 2 years at 5% is:
A. Rs. 20
B. Rs. 18
C. Rs. 21
D. Rs. 19
Answer: Option C
Solution (By JKSSB Mock Tests)
D = 8400 × 0.0025 = Rs. 21.

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Practice More Compound Interest Questions

Question #1
What is the compound interest on Rs. 8000 at 5% per annum for 2 years?
A. Rs. 860
B. Rs. 800
C. Rs. 820
D. Rs. 840

Correct Answer: Option C


Explanation:
A = 8000 × (1.05)² = 8000 × 1.1025 = 8820, CI = 8820 − 8000 = Rs. 820.

This question belongs to: Maths Compound Interest
Question #2
The effective annual rate of interest for 10% per annum compounded quarterly is:
A. 10.50%
B. 10.38%
C. 10.47%
D. 10.25%

Correct Answer: Option B


Explanation:
Quarterly rate 2.5%, (1.025)⁴ = 1.10381289, effective = 10.3813% ≈ 10.38%.

This question belongs to: Maths Compound Interest
Question #3
The compound interest on a certain sum of money for 2 years at 5% per annum is Rs. 1025. What would be the simple interest on the same sum at the same rate for the same time?
A. Rs. 1010
B. Rs. 1020
C. Rs. 980
D. Rs. 1000

Correct Answer: Option D


Explanation:
Effective rate of compound interest for 2 years at 5% = 5 + 5 + (55)/100 = 10.25%. Simple interest rate = 5 * 2 = 10%. Given 10.25% of sum = 1025 => 1% of sum = 100. Simple Interest = 10% of sum = 10 * 100 = Rs. 1000.

This question belongs to: Maths Compound Interest