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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.

Q: Are all square numbers also composite numbers explain?

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The square of any odd number is also an odd number for reasons that should be obvious.

Greater than one, numbers are either composite or prime, never both.

Yes, of course. In fact the product of any two numbers is composite unless one of them is 1.

8, 9, 10

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

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not all numbers are composite cause theres also prime numbers bro.

Square numbers can't be prime. They have too many factors.

No, square numbers greater than 1 have more than two factors.

The square of any odd number is also an odd number for reasons that should be obvious.

Since 4 and 28 are composite numbers, then any of their multiples are also composite.

Greater than one, numbers are either composite or prime, never both.

Yes, of course. In fact the product of any two numbers is composite unless one of them is 1.

No, some composite numbers are odd. The smallest composite odd numbers are 9, 15, 21, 25, and 27. Not all even numbers are composite either. There's only one even number that's prime, which is 2.

4, which is the square of the prime number 2, is the smallest composite number.

Divisors. Primes are divisible by themselves, and one. Composite numbers also have other divisors.

Not necessarily. For example 15 and 16 are composite numbers. They add to 31, which is a prime number. Similarly, the composite numbers 20 and 21 add up to 41, which is a prime number.

8, 9, 10