Compound Interest Practice Test Set 3

Step 1: Identify what the question asks and note the relevant values from the question.
Step 2: Apply the appropriate compound-interest or simple-interest relationship.
16 = $2^4$. Time required = 4 * 6 = 24 years.

Step 3: Match the calculated result with the options.
The matching value is the correct answer.

Correct Answer: Option C.

Step 1: Identify what the question asks and note the relevant values from the question.
Step 2: Apply the appropriate compound-interest or simple-interest relationship.
SI for 1 year = 100. CI for 2 years = SI + 1 year SI * (R/100) = 200 + 100 * 0.05 = Rs 205.

Step 3: Match the calculated result with the options.
The matching value is the correct answer.

Correct Answer: Option D.

Step 1: Identify what the question asks and note the relevant values from the question.
Step 2: Apply the appropriate compound-interest or simple-interest relationship.
A/P = 4,410 / 4,000 = 441 / 400 = (21/20)^2. Rate = (21 - 20)/20 * 100% = 5%.

Step 3: Match the calculated result with the options.
The matching value is the correct answer.

Correct Answer: Option A.

Step 1: Identify what the question asks and note the relevant values from the question.
Step 2: Apply the appropriate compound-interest or simple-interest relationship.
Diff = P * (R/100)^2 = 20,000 * (5/100)^2 = 20,000 * 0.0025 = Rs 50.

Step 3: Match the calculated result with the options.
The matching value is the correct answer.

Correct Answer: Option B.

Step 1: Identify what the question asks and note the relevant values from the question.
Step 2: Apply the appropriate compound-interest or simple-interest relationship.
Half-yearly rate = 5% = 1/20. A/P = 9,261 / 8,000 = (21/20)^3. Time = 3 half-years = 1.5 years.

Step 3: Match the calculated result with the options.
The matching value is the correct answer.

Correct Answer: Option C.