Question

1)A null set is a set with _____ elements in it.
2)The set of even prime numbers is ________ set.
3)The number of elements in a set. is called the ______
4) Every set is a ______ of itself.

Answer 1

1-zero elements
2-singleton set(it consists of only 2)
3-cardinal number of a set
4-subset

Answer 2

Hi Sir,

(1)A null set is a set with zero elements in it.

(2)The set of even prime numbers is singleton set.It is called so if it has only one element in the set.

(3)The number of elements in a set is called the cardinal number.

(4)Every set is a subset of itself.

hope it helps