Revanth wants to mark his brother's birthday on the given calendar. He knows that it is three days before Independence day. Which day is his birthday?
A boy is excited about his approaching birthday. He collects 1 leaf on the first day of the month, 2 leaves on the second day and 3 leaves on the third day of the month and so on. On his birthday, he finds that he has collected 210 leaves in all. On which day of the month is his birthday?