Finite set, Infinite set, Singleton set - Practice Questions & MCQ

Finite set:  A set which is empty or consists of a finite number of elements is called a finite set.

Examples: φ, {a}, {1,2,5,9}, {x: x is a person of age more than 18}

Infinite set: A set which has infinite elements is called an infinite set.

Examples:

a set of all the lines passing through a point,

set of all circles in a plane,

set of all points in a plane, 

N, Z, Q, Q', R

{x : 2 < x < 2.1} 

Singleton set: A set which is having only one element is called a singleton set.

Example: {3}, {b},

{{1,2,3}} is also singleton as it has one element which is a set

{φ} is also a singleton set

Note: Empty and singleton sets are finite sets