A whole number that can be divided exactly by numbers other than 1 or itself.

Example: 9 can be divided exactly by 3 (as well as 1 and 9), so 9 is a composite number.

But 7 cannot be divided exactly (except by 1 and 7), so is NOT a composite number (it is a prime number).

All whole numbers above 1 are either composite or prime.

Example: 9 can be divided exactly by 3 (as well as 1 and 9), so 9 is a composite number.

But 7 cannot be divided exactly (except by 1 and 7), so is NOT a composite number (it is a prime number).

All whole numbers above 1 are either composite or prime.

See: Prime Number

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