09 April 2023 is Friday. What will be 30 April 2023?

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 }

09 + 0 + 06 + 23 + 05 = 43

remainder of \(\frac{43}{7}\) = 01

Therefore, the code of 01 is Sunday + 5 = ( Friday )

 

Similarly,

30 April 2023;

30 + 0 + 06 + 23 + 05 = 64

remainder of \(\frac{64}{7}\) = 01

Therefore, the code of 01 is Sunday + 5 = ( Friday )