Which of the following are examples of the null set?

G = {0}

Which of the following are examples of the null set?

E = {x : x ϵ W, x + 3 ≤ 3}.

Which of the following are examples of the null set?

F = {x : x ϵ Q, 1 < x < 2}.

Which of the following are examples of the singleton set?

(i) {x : x ϵ Z, x² = 4}.

(ii) {x : x ϵ Z, x + 5 = 0}.

(iii) {x : x ϵ Z, |x| = 1}.

(iv) {x : x ϵ N, x² = 16}.

(v) {x : x is an even prime number}

Which of the following are pairs of equal sets?

A = set of letters in the word, ‘ALLOY.’

B = set of letters in the word, ‘LOYAL.’