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  • Sangeeta remembers that her father's birthday was certainly after eight but before thirteenth of December.
Question 1:
Sangeeta remembers that her father's birthday was certainly after eight 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. 10th
B. 11th
Feedback According to Sangeeta, 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 days 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.
C. 12th
D. Data inadequate

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