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# What is a whole number?

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A whole number belongs to the set of integers that are equal to or greater than zero. For example, the set of numbers {0, 1, 2, 3, 4, 5, ...} contains all of the whole numbers.

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Credit: Leonid Mamchenkov CC-BY 2.0

Negative numbers and decimals are not considered whole numbers, although negative numbers are considered integers. The set for integers can be written as { ... -3, -2, -1, 0, 1, 2, … }. A counting number is any whole number except for zero and is shown by the set {1, 2, 3, 4, 5, … }. The term "natural number" may refer to either the set of whole numbers or the set of counting numbers.

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## Related Questions

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A factor pair is a pair of integers whose product is a given number. The factors of a prime number are only 1 and itself. Composite numbers have the factor pair of 1 and itself, as well as at least one other factor pair.

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Adding two positive integers results in a positive number, and adding two negative integers yields a negative number. Multiplying two negative or two positive integers makes a positive number, but multiplying a negative by a positive yields a negative integer. Similarly, dividing a positive by a positive or a negative by a negative gives a positive answer, but dividing a positive by a negative or a negative by a positive always results in a negative solution.

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In math, the term distinct number is used to refer to a number in a set that is not equal to another number. For example, the set of numbers {1, 2} contains the two distinct numbers 1 and 2, which can be proven by evaluating different traits of each number.