yes it is. Example:6+4=10
even
The sum of two even numbers is always an even number.
The sum of two odd numbers is an even number.
The sum of two odd numbers is always even.
The sum of two negative numbers is 27.5 unless you add them together on a Tuesday, in which case the sum is 25.7. That is a conjecture about the sum of two negative numbers. There is no reason for a conjecture to be true, or even credible.
even of course
even
The sum turns out even.
There are no four consecutive whole numbers that add up to 35. The sum of two consecutive [whole] numbers is an even number plus an odd number which is an odd number. The sum of two consecutive numbers and the two next consecutive numbers is the sum of two odd numbers which is even, but 35 is odd, so no four consecutive whole numbers cannot add up to 35.
The sum of two even numbers will always be another even number.
The sum of two even numbers is always an even number.
The sum of two even numbers is always an even number.
The sum of two odd numbers MUST be even. So there is no answer to the question.
Two odd numbers always sum to an even number. Always. Two even numbers always sum to an even number, and an odd number and an even number always sum to an odd number.
The sum of two odd numbers or two even numbers is an even number. The sum of an odd number and an even number is an odd number.
The sum of two odd numbers is an even number.
The sum of two odd numbers is always even.