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# What is a composite number?

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A composite number is a positive whole number that can be divided evenly by a number other than itself and one. For example, 12 is a composite number, as it can be divided evenly by three and four.

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All whole numbers greater than zero are either prime numbers or composite numbers. A prime number can only be divided evenly by itself and one, whereas a composite number can also be divided evenly by a third number. The first four composite numbers counting from zero are four, six, eight and nine. Each composite number is also the product of two or more prime numbers.

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## Related Questions

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A prime number is a whole number greater than one that is only divisible by one or itself without leaving a remainder. A composite number is a whole number greater than one that is evenly divisible by more than one and itself.

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In math, zero is considered to be an even number. In order to be even, a number must be able to be divided exactly by two. Zero qualifies because zero divided by two equals zero.

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A number that is multiplied by itself is called a base when it is written in exponential notation. Exponential notation consists of the number to be multiplied and a numeral in superscript to the right of it to indicate the number of times it is to be multiplied by itself.