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The natural numbers, or the numbers used to count.
The numbers used to count things; the set of counting numbers is {1, 2, 3, 4, … }. All counting numbers are integers and rational numbers, but not all integers or rational numbers are counting numbers. Also called natural numbers. The counting numbers and 0 are called whole numbers.
The set {1, 2, 3, ...} of all positive whole numbers, also called the natural numbers.
The set of numbers consisting of {1, 2, 3, 4, 5, 6, ...
All whole numbers greater than zero; also called natural numbers.
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