If 31 December 2009 was Thursday, then what was the day of the week on 25 December 2010?
Answer & explanation
Correct answer: option 3
Using Code Method :-
\(\frac{Date+Month code+Year code+Last 2 digits of yr+Leap yrs till given yr}{7}\)
( Note: Remainder of the above sum will be the code of week day }
31 Dec 2009;
31 + 06 + 06 + 09 + 02 = 54
remainder of \(\frac{54}{7}\) = 05
Therefore, the code of 05 is Thursday
Similarly,
25 Dec 2010;
25 + 06 + 06 + 10 + 02 = 49
remainder of \(\frac{49}{7}\) = 0
Therefore, the code of 0 is Saturday