set theory

1. Two sets are said to be equivalent,if they contain different number of elements.true/false.
3. set If set A is subset of set B,then B is called.
6. A set which is not finite.
8. IF A={5,6,7} AND B={6,8},Then which operation is used to get {5,6,7,8}
10. a type of set,which has only one element in it.
12. The cardinal number of empty set.
15. It is a collection of well-defined objects.
17. a closed curve figure which represents a set.
18. A set which has same(identical elements)
19. The set {0} is not an empty set.True/false
20. The form in which the elements of the set are enclosed in curly brackets{}after separating them by commas.

1. {3,4,5....100} and so on is an example of ____ set.
2. another name for null set.
4. A set in which two sets have no element in common.
5. when all the elements of the set B belong to set A,the set B is called as ____ of set A.
7. A set which has no elements in it.
9. a set which is donated by the symbol "U".
11. the form in which the actual elements of the set are not written but a statement or a rule is written.
13. when two sets have at least one element in common.
14. the objects used to form a set.
16. A set has two operation,one is called union and the other one?