Can you calculate, on which day is our anniversary?
For my anniversary, I decided to surprise my husband since he is a voracious reader, I decided to collect a lot of books for him.
On the first day of the month, I bought one book, on the second, I bought two and on the third, I bought three.
This process went on till the anniversary and on the day, I had 276 books with me to gift him.
Can you calculate, on which day is our anniversary??