Solved IB ACIO Question
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Q · Arithmetical Reasoningmedium · 45s
If a sum doubles in 8 years at simple interest, 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.
SI = CP in 8 years. R = (100 × 100)/(8 × 100) = 12.5% (corrected option B).
Final Answer: Option A — 10%