If 31 January 2022 was a Monday, what was the day on the same date 100 years ago?
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 Jan 2022;
31 + 01 + 06 + 22 + 05 = 65
remainder of \(\frac{65}{7}\) = 02
Therefore, the code of 02 is Monday
Similarly,
31 Jan 1922; ( Same date 100 yrs ago of 2022 )
31 + 01 + 0 + 22 + 05 = 59
remainder of \(\frac{59}{7}\) = 03
Therefore, the code of 03 is Tuesday