If `S_(n) = (4^n) + 3`, what is the units digit of `S_(100)` ?

What is the unit’s digit of 121^(121) ?

If A_(n)=7^(n)-1 , what is the units digit of A_(33) ?

The unit digit of (316^3)^(4n) + 1 is

If n(A)=4, n(S)=12, what is P(A)?

If N=1!+2!+3!-4!+….+47!-48!+49! , then what is the unit digit of N^(N) ?

If P(A)=3/4, n(A)=39, what is n(S)?

If P(A) =3/4 , n(A) =24 , what is n(S)=?

What is the digit at unit's place of 9^(n)?

If n is a one-digit positive integer, what is n? (1) The units digit of 4^n is 4. (2) The units digits of n^4 is n.