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Q: What are the odd numbers between 10 and 30 as the sum of three odd primes?

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All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.

There are some patterns, but none that can help you determine, in all cases, whether the number is a prime or not.For example: * All primes except 2 are odd numbers. However, not all odd numbers are primes. * All primes greater than 3 are of the form 6n - 1, or 6n + 1. However, not all numbers of this form are primes.

The sum of three odd numbers is odd but 270 is even, therefore there are no three odd numbers that add to 270. Similarly the product of two of more odd numbers is odd but 270 is even, therefore there are no three odd numbers that multiply together to get 270.

All even numbers except 2 are divisible and thus not prime. There is no such number for odd numbers, and there is in fact just one even prime and infinitely many odd primes.

There are 49 odd numbers between the two numbers.

Related questions

There are not three odd primes with the sum of 14. The sum of three odd primes will be an odd number.

There is a one-to-one relationship between even perfect numbers and Mersenne primes. It is unknown whether there are any odd perfect numbers.

With the exception of 2, all primes are odd numbers, therefore the answer is no.

All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.

They are called twin primes. 3 & 5 are twin primes.

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There are some patterns, but none that can help you determine, in all cases, whether the number is a prime or not.For example: * All primes except 2 are odd numbers. However, not all odd numbers are primes. * All primes greater than 3 are of the form 6n - 1, or 6n + 1. However, not all numbers of this form are primes.

No. Twin primes are two consecutive odd numbers that are prime, such as 17 and 19.

To make odd numbers total an odd number, you have to have an odd number of them. 7 + 13 + 43 = 63

Actually 2 is a prime number so not all are odd primes.

No. 2 is a prime and it is not odd. But all other primes must be odd because otherwise they would be divisible by 2.

The sum or product of three odd numbers will always be odd.

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