Compound Interest Practice Test Set 3

Identify what the question asks and note the relevant values from the question.

Apply the appropriate compound-interest or simple-interest relationship.
Amount $A = 5,000 \cdot (1.1)^3 = 5,000 \cdot 1.331 = Rs 6,655$.

Identify what the question asks and note the relevant values from the question.

Apply the appropriate compound-interest or simple-interest relationship.
$8 = 2^3$. Since the sum doubles in 4 years, it becomes 8 times in 3 * 4 = 12 years.

Identify what the question asks and note the relevant values from the question.

Apply the appropriate compound-interest or simple-interest relationship.
Effective CI for 2 years at 20% = 44%. P * 44% = 880 => $P = Rs 2,000$. SI for 2 years at 20% = 40% of 2,000 = Rs 800.

Identify what the question asks and note the relevant values from the question.

Apply the appropriate compound-interest or simple-interest relationship.
Effective CI % = 15 + 15 + (15*15)/100 = 32.25%. CI = 8,000 * 32.25% = Rs 2,580.

Identify what the question asks and note the relevant values from the question.

Apply the appropriate compound-interest or simple-interest relationship.
$A/P = 676 / 625 = (26/25)^2$. Rate = (26 - 25)/25 * 100% = 4%.