If P(A) denotes the power set of A and A is the void set, then what is number of elements in `P(P(P(P(A))))`

Suppose P{S) denote the power set of the set S. Let A = {1}. If the number of elements in the P(P(P(P(A)))) is 4n then n =__

If A={1,2},P(A) denotes power set of A ,then the number of elements in P(P(P(P(A))) is 2^256 2^1024 2^512 2^(2^16)

If a set A contains 4 elements, then what is the number of elements in A xx P(A) ?

If A is the null set, find the number of elements in the power set P(P(A)) .

If P and Q any two sets , then Q - P=

If a set A has n elements then find the number of elements in its power set P(A) .

Let P{X) denote the power set of X and A = {1,2}, then P(P(A)) contains m elements where m is equal to