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Yes - every Prime number except for 2 is odd - including the primes between 10 and 20, namely 11, 13, 17, and 19.

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Q: Are all prime numbers from 10 to 20 odd?

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Numbers that are prime can't be multiples of 10. Multiples of 10 can't be odd.

Yes. The only even prime number is 2.

No, says the number 9.

There are no prime numbers greater than 10 that add up to 29. Since all prime numbers greater than 2 are odd numbers, no two prime numbers greater than 2 can have an even number for their sum.

The prime numbers 3 an 7 are both odd and sum to 10.

The numbers between 10 and 20 that are not prime are 12, 14, 15, 16 and 18. So 15 is the odd number and the rest are even numbers.

http://en.wikipedia.org/wiki/List_of_prime_numbers#The_first_500_prime_numbers Also note, all of these prime numbers, except for the number 2, are odd, not even. Even numbers are divisible by 2 and hence, not prime.

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The factors of 50 are 1, 2, 5, 10, 25 and 50. The prime odd factors of 50 are 1, 2, and 5.

No. 2 x 5 = 10

All of the odd numbers in that range can be factors.

There are no prime numbers at all between 10.

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