Sets

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
A is a well-defined collection of objects.

A set which does not contain any element is called .

A set which consists of a definite number of elements is called ,otherwise, the set is called .

Two sets A and B are said to be equal if they have exactly the .

A set A is said to be of a set B, if every element of A is also an element of B. Intervals are subsets of R.

A power set of a set A is collection of all of A

Sets are used to define the concepts of .

The study of geometry, sequences, probability, etc. requires the knowledge of .

The interval which contains the end points also is called .

Let a, b ∈ R and a < b. Then the set of real numbers { y : a < y < b} is called an .

Most of the relationships between sets can be represented by means of diagrams which are known as .

The universal set is represented usually by a and its subsets by .

The symbol ‘∪’ is used to denote the .

The symbol ‘∩’ is used to denote the .

If A and B are two sets such that A ∩ B = φ, then A and B are called .

Let U be the universal set and A a subset of U. Then the of A is the set of all elements of U which are not the elements of A.

The complement of the union of two sets is the intersection of their complements and the complement of the intersection of two sets is the union of their complements. These are called laws.