(i) {3, 6, 9, 12}

A = {x : x is multiple of and less than }

(ii) {2, 4, 8, 16, 32}

B = {x : x = ^p, 0 < P < , P ∈ N}

(iii) {5, 25, 125, 625}

C = {x : x = ^p, 0 < P < , P ∈ N}

(iv) {1, 4, 9, 16, 25, …, 100}

D = {x : x = ², 0< P < , P ∈ W}