If 5 November 2019 was Tuesday, then what was the day of the week on 5 December 2011?

Monday

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 }

05 Nov 2019;

05 + 04 + 6 + 19 + 04 = 38

remainder of \(\frac{38}{7}\) = 03

Therefore, the code of 03 is Tuesday

Similarly,

05 Dec 2011;

05 + 06 + 06 + 11 + 02 = 30

remainder of \(\frac{30}{7}\) = 02

Therefore, the code of 02 is Monday