EduGoog

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 ?

Option:
A. 10th
B. 11th
C. 12th
D. Data inadequate
E. None of these
Answer: D . Data inadequate

Justification: According to Sanbgeeta, the father`s birthday falls on one of the days among 9th, 10th, 11th and 12th December. According to Natasha, the father`s birthday falls on one of the day among 10th, 11th, 12th and 13th December. The days common to both the groups are 10th, 11th and 12th December. So, the father`s birthday falls on any one of these days.

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