Respuesta :
Essentially, the rule goes as so: odd + odd = even, even + even = even.
Although that may not be the answer you're looking for, it is a math rule that is never debunked and essentially the premises for why you get an even sum practically always depending on the numbers.
Hope this helps!
When you add the same number together, it is always going to be an even number
Think of this as:
half + half = whole
whole + whole will still = whole
whole meaning even, and half meaning odds.
hope this helps