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No, they do not. If one of the prime numbers is 2, you will have an odd number.

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โˆ™ 2010-11-13 22:59:35
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Q: Does two prime numbers always add up to an even number?
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Is it true that the sum of two prime numbers is always an even number?

Not quite.When two prime numbers of 3 and higher are added together, the result is always even, because all such prime numbers are odd numbers, and when two odd numbers are added together, the result is always an even number.However 2 is a prime number, and 2 is also an even number. Adding 2 (an even number) to a different prime number (an odd number) will always yield an odd number.Only if you don't include "2".


Can a even number be a prime number even though all the prime numbers are odd?

Two is even and it's a prime number. All other even numbers can never be prime though because they will always be divisible by 2. So in fact, not all prime numbers are odd, but 2 is the only even prime number.


Could prime numbers can never be even numbers?

Not quite true . . . the number '2' is a prime number. All the rest of the even numbers cannot be prime because they always can be divided by 2.


Is 550 a composite or prime number?

Any even number is always divisible by 2 and thus (apart from 2 itself) all even numbers can not be prime numbers.


Why are square numbers one less than a prime number always even?

Prime numbers, except 2, are always odd (they would not be prime if they were even cos they would be divisible by 2.) 1 less than any odd number must be an even number.


Will a prime number always have an odd numbers of factors?

All prime numbers have only 2 factors which are themselves and one. Al prime numbers are odd numbers except for 2 which is the only even prime number.


Is even number times even number always even?

Yes, it is. Any whole number times an even number will be even. This is because whole numbers can be represented as the product of their prime factors. Every even number contains 2 as a prime factor (thereby excluding all even numbers above 2 from being prime.) Additionally, the product of any two numbers is equal to the product of their prime factors. This means that the result of multiplying an even number by a whole number will always have a prime factor of 2, making it an even number.


Is 8 both prime and even?

No, as a matter of fact there is no such thing as a prime and even number. Even numbers will always be able to divide by two.


If you add or subtract using only prime numbers is the answer always a prime number?

No, as all prime numbers are odd, excluding 2, and when you add two odd numbers you get an even number. This even number can't be a prime number as it will be divisible by 2. 101 and 31 are both prime, but 101+31 is 132.


When you add two prime numbers why do you get an even number?

You don't always. 2 + 5 = 7, for example. But all prime numbers other than 2 are odd and two odd numbers always equal an even number when added together.


Is 308 a prime or composite number?

it is a composite number because you can tell from the 8 that it is an even number, and even numbers can always be divided.


Is the product for any two prime numbers always odd?

No. 2 is a prime number, and any product of 2 and another prime number will be even.

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