Solved IB ACIO Question
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Q · Arithmetical Reasoningmedium · 45s
A sum doubles at simple interest in 5 years. Find rate of interest.
TopicArithmetical Reasoning
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.25
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
R = 100 ÷ 5 = 20%.
Final Answer: Option A — 20%