Discussion Forum



(i) A year has 365 days.

(ii) Years, divisible by 4, are leap years, e.g., 1986. They have 366 days.

(iii) February in a leap year has 29 days.

(iv) The last day of a year is the same as the first day. Thus, if the first day of a year is Friday, then the last day of the year is Friday and the first day of the next year is Saturday. However, if the first day of a leap year is Friday, then the last day of the year is Saturday and the first day of the next year is Sunday

1)

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


A) 10th

B) 11th

C) 12th

D) Data inadequate

E) None of these

Answer:

Option D

Explanation:

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.

Then, days common to both the groups are 10th, 11th and 12th December. So, the father's birthday falls on anyone of these days.