Some odd numbers can be written as the sum of prime numbers. 2 + 3 = 5
the numbers are odd
While all prime numbers are odd (except 2), not all odd numbers are prime. 9 for example is an odd number, but you can get it by multiplying 3X3, so it is not prime. Odd numbers are numbers that are not divisible by 2. Prime numbers are numbers that cannot be generated by multiplying 2 whole numbers besides 1 and itself.
No, it cannot be done. As 23 is odd, two numbers used would have to be one odd and one even. As 2 is the only even prime number and 21 + 2 equals 23, but 21 is not a prime number, it cannot be done.
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.
With exception of the number 2, all prime numbers are odd. However, not all odd numbers are prime.
All prime numbers are odd with the only exception of the prime number 2. However, not all odd numbers are prime.
The only even prime is 2. The rest are all multiples of 2, and thus cannot be prime.
odd numbers
Because many of them are divisible by smaller odd numbers. For example 35 is divisible by 5 and so 35 cannot be a prime number.
There are more odd numbers than prime numbers.
All prime numbers are odd, exept of the first prime number 2.