Question

Mahesh was born on $\text{11 August 2004}$. His younger sister Malini was born exactly after $100$ weeks. What is the date of birth of Malini ?

Answer 1

In a ordinary year we have exactly 52 weeks and 1 odd day.
So, 52 weeks or 364 days after 11 August 2004 is 10 Aug 2005.
Now, we have left with 48 weeks.
Again, take the date 52 weeks after 10 Aug 2005. It will be 9 Aug 2006.
Now, subtract 4 weeks from the date 9 Aug 2005 to get the date of birth of Malini.
Therefore, 9 Aug 2006 - 4 weeks will gives us the date 12 July 2006.
Hence, Malini was born on 12 July 2006.