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Is the sum of two composite numbers also composite?
Not always as for example 20+9 = 29 which is a prime number
Are all square numbers also composite numbers explain?
Every square number (except 1) is composite. Prime numbers only have two factors, one and the numbers themselves. Since square numbers also have at least the square roots as factors, they have to be composite.
Why do you need to know about prime and composite numbers?
If you know a number is composite, then you also know that it can be factored into more factors than just 1 and itself. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
What is the sum of the first four composite numbers?
You can figure out the "composite numbers" from any table of primes - all the positive integers that are not prime numbers are composite (the number one should also be excluded). The first four composite numbers are:4, 6, 8, 9
What does composite mean for beginners?
Composite numbers are integers or whole numbers that contain more than two factors in them. Prime numbers are also integers but only have two factors which are themselves and one.
