Harish remembers that his marriage was after 19th September, while his father remembers that it was before 21st September. On which date of September was his marriage?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 20
Both memories are true, so the date must be after 19 and before 21 at the same time. “After” and “before” leave out the dates named.
Harish: after 19, so 20, 21, 22, …
His father: before 21, so …, 18, 19, 20
The only date in both lists is 20th September