If 12^th February 2011 was a Saturday, then what was the day of the week on 13^th February 2015?

Friday

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 }

12 Feb 2011;

12 + 04 + 06 + 11 + 02 = 35

remainder of \(\frac{35}{7}\) = 0

Therefore, the code of 0 is Saturday

Similarly,

13 Feb 2015;

13 + 04 + 06 + 15 + 03 = 41

remainder of \(\frac{41}{7}\) = 06

Therefore, the code of 06 is Friday