Simple & Compound Interest Questions for ADRE Grade III 2027
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Simple & Compound Interest — Quick Overview
SI/CI questions are common in ADRE — 3-4 questions. Know both formulas cold.
Key Formula
SI = PRT/100 | CI = P(1+R/100)^T | CI - SI for 2 years = P(R/100)²
Exam Tip
For 2-year problems: CI exceeds SI by P(R/100)². This shortcut saves 2 minutes.
Common Trap
When compounded semi-annually: halve the rate and double the time period.