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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.

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

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The numbers 0 and 1; all negatives; all decimals; and all fractions are neither prime nor composite.

All even numbers greater than two are composite.

38 is a composite number because composite numbers are numbers that have more than 1 and themselves as factors. 1x38 is not the only solution, so it isn't prime. One solution for this could be 2x19

Zero is composite because it has all the real numbers as factors.

All of them except for 31, 37, 41, 43 and 47 which are prime numbers.

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

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

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

97 is prime, the rest are composite.

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.

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.

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

No, multiples of prime numbers are composite.

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

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.

Composite. All even numbers are.

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.