If 20 July 2021 was Tuesday, then what was the day of the week on 28 November 2021?

Sunday

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 }

20 July 2021;

20 + 0 + 06 + 21 + 05 = 52

remainder of \(\frac{52}{7}\) = 03

Therefore, the code of 03 is Tuesday 

Similarly,

28 Nov 2021;

28 + 04 + 06 + 21 + 05 = 64

remainder of \(\frac{64}{7}\) = 01

Therefore, the code of 01 is Sunday