When two even numbers are added, the sum is always an even number. This is because even numbers can be expressed in the form \(2n\), where \(n\) is an integer. When you add two even numbers, say \(2a\) and \(2b\) (where \(a\) and \(b\) are integers), the sum is:
\[ 2a + 2b = 2(a + b) \]
Since \(a + b\) is an integer, \(2(a + b)\) is also even. Thus, the sum of two even numbers is even.