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Example Questions
Example Question #1 : Cardinality
Which of the following is a classification of a set whose cardinality is infinite?
Positively
Countably
Negatively
None of the answers
Continuously
Countably
If a set is stated to have infinite cardinality then it will fall one of the following categories,
I. Countably
II. Uncountably
Countably infinite sets are those that the elements within the set are able to be counted.
For example, the set of natural numbers
is a countably infinite set.
Uncountably infinite sets are those that the elements cannot be counted.
For example, the set of real numbers,
The reason the set of real numbers is not countable is because there are infinitely many elements between each element. This differs from the natural numbers because in the natural numbers there are no elements between elements.
Therefore the correct solution is "countably".
Example Question #2 : Cardinality
Which of the following is a classification of a set whose cardinality is infinite?
Positively
Negatively
Uncountably
Infinitely
None of the answers
Uncountably
If a set is stated to have infinite cardinality then it will fall one of the following categories,
I. Countably
II. Uncountably
Countably infinite sets are those that the elements within the set are able to be counted.
For example, the set of natural numbers
is a countably infinite set.
Uncountably infinite sets are those that the elements cannot be counted.
For example, the set of real numbers,
The reason the set of real numbers is not countable is because there are infinitely many elements between each element. This differs from the natural numbers because in the natural numbers there are no elements between elements.
Therefore the correct solution is "uncountably".
All Theory of Positive Integers Resources
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