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Not all numbers are either prime or composite. The number 1/2 is neither prime nor composite. If you are referring only to the natural or counting numbers, note that every natural number is equal to the product of itself and 1 so each number has at least one divisor, itself. If it has no more divisors, then it is prime. If it has more than itself as a divisor, then it is composite.

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Q: Why should all the numbers be prime or composite?
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Related questions

What are all of the composite numbers and all of the prime numbers?

It is impossible to list the infinite number of prime numbers and composite numbers.


Are all numbers in the 90's prime or composite?

The numbers in the 90s are all composite, apart from 97, which is prime.


Does the prime factorization of any composite number include prime and composite numbers?

Prime factorization never includes a composite number. All numbers in prime factorization must be prime numbers.


Are all the numbers in the nineties prime or composite?

97 is prime, the rest are composite.


What numbers are composite greater than 98 but less than 105?

For this type of question, you should search the Internet for a list of prime numbers. All the integers that are not prime numbers are composite. In this case, the relevant prime numbers are 101 and 103.


What are all the prime composite numbers?

There is no prime composite number; an integer greater than 2 can be either prime or composite, but not both. Nor can you list all the prime number and all the composite numbers: you have infinite sets in both cases.


What are numbers after one that are composite and prime numbers?

All numbers greater than one are positive integers that are either composite or prime numbers.


Are all multiples of a prime number are prime numbers?

No, multiples of prime numbers are composite.


How many composite numbers are there from 1 to 40?

Look up a table of prime numbers. All those numbers that are not prime, are composite - except 1, which is neither prime nor composite.


What are the composite numbers 0 to 50?

Do a quick search on the Web to get a list of prime numbers; all numbers greater than 1 that are not prime are composite. (That is, 0 and 1 should not be listed as "prime numbers", nor as "composite numbers".) Composite numbers are numbers that have at least three factors. A composite number can be divided evenly by 1, itself, and another number. From zero to fifty, they are 2,4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,45,46,48, and 49.


Is 6 a composite or prime?

Composite. All even numbers are.


What are all the numbers that are not prime or composite?

The property of prime or composite applies only to integers. All other numbers (non-integer rationals and all irrational numbers) are neither prime nor composite. Within integers, 0 and 1 are neither prime nor composite.