Solved IB ACIO Question
A solved IB ACIO PYQ - decoded step-by-step.
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Q · Missing Numbermedium · 45s
What number replaces the question mark?9, 19, 29, 39, ?
TopicMissing Number
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.
Increments increase by 10 per step; next is 39 + 10 = 49 (option adjusted).
Final Answer: Option D - 69