Solved IB ACIO Question
A solved IB ACIO PYQ — decoded step-by-step.
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Q · Series (Numeric and Alphanumeric)medium · 45s
Identify the missing number: 3, 9, 27, 81, ... , 729
TopicSeries (Numeric and Alphanumeric)
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.
Each term is multiplied by 3. 81×3=243, 243×3=729.
Final Answer: Option B — 243