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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?

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? Correct Answer Data inadequate

Given:

According to Sangeeta:

Her father's birthday lies between → 8th December and 13th December.

According to Natasha (Sangeeta's sister):

Her father's birthday lies between → 9th December and 14th December.

By combining the above two statements:

The birthday of Sangeeta and Natasha's father lies between → 9th December and 13th December.

Thus, the birthday can be on 10th, 11th, or 12th December.

Hence, data inadequate.

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