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Q: What are the prime numbers between zero and twenty?

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Zero is neither prime or composite but it is an even number because it is between 2 odd numbers which are -1 and +1

Lots of prime numbers have zeros in them. 101, 103, 107 and 109 are all prime numbers. Prime numbers can't end in zero. Numbers that end in zero are multiples of ten and have too many factors to be prime numbers.

No combination of non-zero even numbers can be relatively prime.

There is no name for numbers which are neither prime nor composite.

The question is quite ambiguous. If you're talking about all the even prime numbers between 4 and 50, then the sum is zero. No even number, except '2', is a prime number, so there aren't any between 4 and 50..

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There are eight of them.

If there are any prime numbers between zero and 90, and between zero and 180, then you can bet on it.

It is less than all of them.

25

Zero is neither prime or composite but it is an even number because it is between 2 odd numbers which are -1 and +1

no

Lots of prime numbers have zeros in them. 101, 103, 107 and 109 are all prime numbers. Prime numbers can't end in zero. Numbers that end in zero are multiples of ten and have too many factors to be prime numbers.

Remember 1 is not a prime number because it is only divisible by itself. 2, 3, 5, 7, 11, 13, 17, 19 These are the prime numbers between 0 and 20. In short, there are 9 prime numbers between 0 and 20.

All non-zero numbers have factors. Some factors are prime numbers. Prime factors are factors that are prime numbers.

No combination of non-zero even numbers can be relatively prime.

Non-Zero Real Numbers are infact complex conjugate numbers. They are negative prime numbers.

There is no name for numbers which are neither prime nor composite.

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