Identify the null sets among the following
C = {x: x is an even prime number } .

Identify the null sets among the following E = {x: x is a perfect square number , 40 lt x lt 50 }

Identify the null sets among the following A = { x: x is a whole number , x lt 1 }

Identify the null sets among the following B = { x: x is a number , x gt x, }

Identify the null sets among the following D= {x : x in I, x^(2) = -4 }

Identify the null sets among the following F = {x : x in N , 5 lt x lt 6. }

Taking the set of natural numbers as the universal set, write down the complements of the following sets: (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 }

For each of the following pairs of sets , identify the disjoint and overlapping sets: A = { x: x is a prime number , x lt 8 } B = {x: x is an even natural number , x lt 8 } .

Find the cardinal number of the following sets : E={x|x is a prime number between 8 and 30}.

If A = {x: x is an even prime number}, then set A is empty.

Write the following sets in the tabular form: {x : x is a positive prime number which divides 72 }