Soln->Total number of days between 11th January 1997 and 10th January 2000 = (365 – 11) in 1997 + 365 in 1998 + 365 in 1999 + 10 days in 2000 = (50 weeks + 4 odd days) + (52 weeks + 1 odd day) + (52 weeks + 1 odd day) + (1 week + 3 odd days) Total number of odd days = 4 + 1 + 1 + 3 = 9 days = 1 week + 2 days Hence, 10th January, 2000 would be 2 days ahead of Sunday i.e. it was on Tuesday.

tuesday...