@15:09 why did sir sy that we could ignore 222^36 ??
Sir meant to say that (222)^36 can be written as (222)^(4*9) we already know that the units place value in the result for any number consisting of 2 in the one's place and raised to the power 4multiple will be 6.Since we already know the value at units place for (222)^36 sir said so.
at 5:09, 9 is not repeating of 4-cycle as 3 & 7. So 9^4n = 1 or 9^2n =1 ??
Yes, that is correct.Thanks for pointing it out.