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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
4.24 The Null Set or Empty Set or Void Set

Null Set:
A null set is a set with no elements in it.

The null set is some times also denoted as empty set or void set. The null set is denoted by . It cal also denoted as {}.
Therefore, = {}.

Things to be noted:

1. , {0} and {} are three different sets.
2. Empty set is denoted by or {}.
3. {0} is a set containing the single element 0 in it.
4. {} is a set whose one element is .
Therefore {0} and {} are not null sets.

Example:
1. There are no natural numbers that are less than zero.
2. There are no odd numbers that have remainder zero when divided by 2.


Directions: State which of the given sets are empty. Also write at least 10 examples of your own.
Q 1: B = {x/x+8 = 8}, x Q.
An empty set
Not an empty set

Q 2: B = {x/x+6 = 6}, x Z.
An empty set
Not an empty set

Q 3: The set of straight lines passing through a pint.
An empty set
Not an empty set

Q 4: The set of all triangles in a plane having the sum of three angles is less than 180.
An empty set
Not an empty set

Q 5: The set of even prime numbers greater than 3.
Not an empty set
An empty set

Q 6: B = {x/x+5 = 5}, x N.
Not an empty set
An empty set

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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