Solved IB ACIO Question
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Q · Classification / Odd One Outmedium · 45s
What day of the week will October 31, 2025, fall on if January 1, 2025, is Wednesday?
TopicClassification / Odd One Out
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.
October 31, 2025, is a Friday because there are 303 days from January 1 to October 31. Taking 303 mod 7 equals 2, and two days after Wednesday is Friday.
Final Answer: Option A - Friday