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.
Effective rate = 21%. CI = 18,000 * 21% = Rs 3,780.

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

Apply the appropriate compound-interest or simple-interest relationship.
$A/P = 3,993 / 3,000 = 1,331 / 1,000 = (11/10)^3$. Rate = 10%.

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 = 10,000 * 32.25% = Rs 3,225.

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

Apply the appropriate compound-interest or simple-interest relationship.
Time = 3 half-years. $A/P = 18,522 / 16,000 = 9,261 / 8,000 = (21/20)^3$. Half-yearly rate = 5% => Annual rate = 10%.

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

Apply the appropriate compound-interest or simple-interest relationship.
Diff = P * (R/100)^2 = 40,000 * (12/100)^2 = 40,000 * 0.0144 = Rs 576.