DIRECTIONS for the question: Solve the following question and mark the best possible option.

Mrs. Susheela celebrated her wedding anniversary on Tuesday, $$30^{th}$$ September, 1997. When will she celebrate her next wedding anniversary on the same day?

To celebrate her wedding on the exact same day, the year of next celebration should have either 0 or 7 or 14...odd days.
It means that if there are N days to the next day of celebration, then remainder when N is divided by 7 should be 0.
We know that every non leap year has +1 odd days and every leap year has +2 odd days.
30th Sept. 1998 --> +1
30th Sept. 1999 --> +1
30th Sept. 2000 --> +2
30th Sept. 2001 --> +1
30th Sept. 2002 --> +1
30th Sept. 2003 --> +1
Sum of all these odd days = 7 which means that day on 30th Sept. 2003 will be Tuesday + 7 = Tuesday.