Solved IB ACIO Question
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Q · Order and Rankingmedium · 45s
Charu correctly remembers that her father’s birthday is after 24 but before 29 of May. Her sister remembers that their father’s birthday is after 27 but before 31 May and her brother remembers that the birthday is on an even date. On which date in May is definitely their father’s birthday?
TopicOrder and Ranking
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.
Charu -> 25, 26, 27, 28
Charu’s sister -> 28, 29, 30
Charu’s brother -> …, 24, 26, 28, 30.
Hence, their father’s birthday is definitely on 28th May
Final Answer: Option B - 28th