We at **ask-math **believe that educational material should be free for everyone. Please use the content of this website for in-depth understanding of the concepts. Additionally, we have created and posted videos on our youtube.

**We also offer One to One / Group Tutoring sessions / Homework help for Mathematics from Grade 4th to 12th for algebra, geometry, trigonometry, pre-calculus, and calculus for US, UK, Europe, South east Asia and UAE students.**

**Affiliations with Schools & Educational institutions are also welcome.**

Please reach out to us on [email protected] / Whatsapp +919998367796 / Skype id: anitagovilkar.abhijit

We will be happy to post videos as per your requirements also. Do write to us.

The concept of sets is important in all branches of modern mathematics. This concept is used in Physics,Chemistry, all Engineering sciences and even in Medical science now-a-days. The mathematician George Cantor has major contribution in introducing and developing the concept of set.A collection of

1) Collection of all positive even integers is a set. 2 is in this set and 1 is not in this set.

2) The collection of all obese persons in any city is not a set, as there is no definite criteria for obesity.

1) A deck of 52 playing cards.

2) The names of the days of a week.

3) A set of instruments on a geometry box.

The objects of a set are called its

If N represents the set of natural numbers . 1,2,3,4,5 ,6,…

So 1,2,3,… are elements of the set

Here as 4 is a member of the set A then we write 4 ∈ A and read as 4 belongs to set A or 4 is in an element of set A.

If 0 is not a member of set A then we write 0 ∉ A and read as 0 does not belong to set A.

1) Set of natural numbers = N = { 1,2,3,4,5,…}

2) Set of whole numbers = W = { 0,1,2,3,… }

3) Set of integers = Z = {…, -3,-2,-1,0,1,2,3, … }

4) Set of rational numbers = Q = { 2 / 3 , -5 / 7, -10 / -3,…} . The elements of this set is in p/q form.

5) Set of real numbers = R = { all whole numbers, integers, rational and irrational numbers}

6) Set of all positive numbers = Z

• Sets

• Representation of-Set

• Cardinal Number

• Types of -Set

• Pairs of -Set

• Subset

• Complement-Set

• Union of the-Set

• Intersection-set

• Operations on-Set

• De Morgan's Law

• Venn Diagrams

• Venn-diagrams for set

• Venn-diagrams for different situations

• Problems on Intersection of Two-Set

• Problems on Intersection three-set

Home Page

GMAT

GRE

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

7th grade math

8th grade math

9th grade math

10th grade math

11th grade math

12th grade math

Precalculus

Worksheets

Chapter wise Test

MCQ's

Math Dictionary

Graph Dictionary

Multiplicative tables

Math Teasers

NTSE

Chinese Numbers

CBSE Sample Papers