Solved IB ACIO Question
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Q · Missing Numbermedium · 45s
Find the missing number in the sequence: 5, 10, 15, ?, 25, 30
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.
The sequence increases by 5 each time. After 15, the next number is 20.
Final Answer: Option B — 20