Question

Sangeeta remembers that her father's birthday was certainly after eighth but before thirteenth of December. Her sister Natasha remembers that their father's birthday was definitely after ninth but before fourteenth of December. On which date of December was their father's birthday?

• A. ${10}^{th}$
• B. ${11}^{th}$
• C. ${12}^{th}$
• D. Data inadequate

Answer 1

The correct option is D Data inadequate

With the information given,

Acc to Sangeeta birthday must fall on

either $9,10,11or12$ December

Acc to Natasha birthday must fall on

either $10,11,12or13$ December

So overlapping days $\Rightarrow$ $10,11or12$ December

But it cannot be ascertained on which particular day.

So the data is inadequate.
Answer is Option D