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What is the meaning of cardinality of a set?
even numbers less that 10
What the meaning of subset?
A subset is a division of a set in which all members of the subset are members of the set. Examples: Men is a subset of the set people. Prime numbers is a subset of numbers.
What is the sign for integers where did it come from and what does it mean?
The symbol for the set is Z, from the German Zahlen meaning numbers.
Are most numbers rational or irrational?
The set of irrational numbers is larger than the set of rational numbers, as proved by Cantor: The set of rational numbers is "countable", meaning there is a one-to-one correspondence between the natural numbers and the rational numbers. You can put them in a sequence, in such a way that every rational number will eventually appear in the sequence. The set of irrational numbers is uncountable, this means that no such sequence is possible. All rational and irrationals (ie real numbers) are a subset of complex numbers. Complex numbers, in turn, are part of a larger group, and so on.
What is the meaning of the math term range?
The range of a set of numbers is the highest number minus the lowest number.
