If 31 December 2003 was a Wednesday, then what was the day of the week on 7 March 2005?
Answer & explanation
Correct answer: option 4

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 2003;
31 + 06 + 06 + 03 + 0 = 46
remainder of \(\frac{46}{7}\) = 04
Therefore, the code of 04 is Wednesday
Similarly,
07 March 2005;
07 + 04 + 06 + 05 + 01 = 23
remainder of \(\frac{23}{7}\) = 02
Therefore, the code of 02 is Monday