Question 17

What was the day of the week on 26 January 2012 ?

Solution

26 January 2012 = (2011 years + period between 1-1-2012 to 26-01-2012)

odd days in 2000 = 0

in remaining 11 years = (2 leap years + 9 normal years) = (2 * 2 + 9 * 1) = 13 - 7 = 6 odd days

Total number of days in period between 1-1-2012 to 26-01-2012 = 26 days = 3 weeks + 5 days = 5 odd days

Total number of odd days = (6 + 5) = 11 - 7 = 4 days

Hence, given day is Thursday (0 odd day means sunday, 1 odd day means mon and so on).


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