Riya remembers that a birthday is after 18th June but before 21st June, while Annu remembers that it is after 19th June but before 24th June. On which date of June is the birthday?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 20
Both memories are true, so the birthday must be a date that appears in both lists. “After” and “before” leave out the dates named.
Riya: after 18 and before 21, so 19 or 20
Annu: after 19 and before 24, so 20, 21, 22 or 23
The only date in both lists is 20th June