What are composite numbers?

Composite numbers are those numbers that are NOT prime numbers. These numbers have three or more factors which include 1 as well.

4, 6, 8, 9, 10, 12, 15, 18, 21....are composite numbers.

For example,

Factors of 25 are 1,5 and 25.

Therefore, 25 is a composite number.

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Updated on: 10-Oct-2022

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