(i) {x : x is an even natural number}

(ii) { x : x is an odd natural number }

(iii) {x : x is a positive multiple of 3}

(iv){x : x is a prime number}

(v) {x : x is a natural number divisible by 3 and 5}

(vi) {x : x is a perfect square}

(vii){x : x is a perfect cube}

(viii) {x : x+5 = 8}

(ix){x : 2x + 5 = 9}

(x) {x : x ≥ 7}

 (xi){x : x ∈ N and 2x+1 > 10}