So the number 4 meets the criteria of a composite number. However, when we come to the number 4, we know that its divisors are 1, 2, and 4. 3 is also not a composite number because it has only two divisors, i.e., 1 and 3 itself. 2 is also not a composite number because it has only two divisors, i.e., 1 and 2 itself. and so on, as we know that 1 is also not a composite number because it has one divisor i.e, 1. Now, if we start counting: 1, 2, 3, 4, 5, 6. A composite number is a number with divisors other than 1 and the number itself. Here, 4, 10, and 12 are even composite numbers because these even numbers have more than 2 factors and satisfy the composite number condition. For example, 4, 6, 8, 10, 12, 14, and 16 are even composite numbers. Here 9 and 15 are odd composite numbers because these two odd numbers have more than 2 factors and satisfy the composite number condition.Īll non-prime even numbers are known as composite even numbers. For example, odd composite numbers are 9, 15, 21, 25, and 27. Properties of Composite NumbersĬomposite numbers have more than two factorsĬomposite numbers are divisible by their factorsĮach composite number is a factor in itselfĮvery composite number will include at least two primes as its factors (eg 35 = 5 x 7, where 5 and 7 are primes)Ĭomposite numbers are also divisible by other composite numbersĪll odd integers that are not prime are known as a composite odd number. For example, 36 is divisible by 2, which means it has factors other than 1 and 13, so we can say that 36 is a composite number. If the number cannot be divided by any of these given numbers, then the number is prime. If the number ends with 0 or 5, then check by 5. If the number is even, then start checking with 2. To do this, we need to check if the number is divisible by these common factors: 2, 3, 5, 7, 11, and 13. Divisibility means that a number is completely (without a remainder) divided by another number other than 1. The divisibility test helps us determine whether a number is prime or composite. The best way to find out a composite number is to do a divisibility test. If a number has more than two factors, it is composite. To find a composite number, we have to find the factors of the given number. Now, let us understand the important properties of composite numbers. In the above example, 4 and 10 are called composite numbers because they have more than 2 factors. The few composite numbers are 4, 6, 8, 9, and 10. Let us know more about the composite numbers with examples. In mathematics, a natural number which has more than two factors is known as a Composite number. For example, 6 is a number divisible by 1, 2, and 3, so it is a composite number. Difference Between Prime and Composite NumbersĪ number divisible by a number other than 1 and the number itself is called a composite number.
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