Yes it is.
False
Yes. It has a logical definition and no members violate that definition.
I assume you mean a set that contains a single whole number. Yes, you can have sets with zero elements, one element, two elements, etc.; so a set which contains a single number is perfectly valid.
Set is a well defined collection of objects. By the number of elements in the set, it can be classified into two as 1.Finite set 2. Infinite set. Example for finite set:{1,2,3,4,5...10}.Example for Infinite set:{1,2,3,4,.....}
There is some disagreement as to whether zero, a whole number, belongs to the set of natural numbers.
set
0 is the only number which is in the set of whole number but not in the natural number
There is no counterexample because the set of whole numbers is closed under addition (and subtraction).
False. The collection of natural numbers is an example of a set, not an element. An element is an individual member of a set, while the collection of natural numbers is a set itself.
null set, cardinality set
It is the maximum of that set.
A number with no fraction, decimal, or percent following the number or a regular counting number (example: 1, 2, 3, 4, 5...)