Piyush remembers that his brother's birthday is after the fifteenth but before eighteenth of February whereas his sister Kavita remembers that her brother's birthday is after the sixteenth but before nineteenth of February. On which day in February is Piyush's brother's birthday?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 17th
Both memories are true, so the birthday must lie in both ranges; “after” and “before” leave out the end dates themselves.
Piyush: after the 15th but before the 18th, so the 16th or the 17th
Kavita: after the 16th but before the 19th, so the 17th or the 18th
The only date in both lists is the 17th of February