Which of the following are examples of the null set
{ y : y is a point common to any two parallel lines}

Which of the following are examples of the null set { x : x is a natural numbers, x 7 }

Which of the following are examples of the null set Set of even prime numbers

Which of the following are examples of the null set Set of odd natural numbers divisible by 2

State which of the following sets are empty and which are not? (i) The set of lines passing through a given point. (ii) Set of odd natural numbers divisible by 2. (iii) {x : x is a natural number, x lt 5 and x gt 7} (iv) {x : x is a common point to any two parallel lines} (v) Set of even prime numbers.

Identify the following sets as null set or singleton set. C = {0}.

Identify the following sets as null set or singleton set. B = The set of all even natural numbers which are not divisible by 2.

State whether each of the following set is finite or infinite: The set of lines which are parallel to the x-axis

Identify the following sets as null set or singleton set. D = The set of all triangles having four sides.