Official Explanation:
This question rewards students who can see through the added complexity of the problem and simplify. This question is asking you not about the sum of the numbers itself, but about whether that sum is even or odd. Remember your number properties here. A sum will be even if both numbers being added are even or if both numbers being added are odd. If you are adding more than two numbers, then the sum will be even as long as there are an even number of odd numbers.
In this case,
...
This question rewards students who can see through the added complexity of the problem and simplify. This question is asking you not about the sum of the numbers itself, but about whether that sum is even or odd. Remember your number properties here. A sum will be even if both numbers being added are even or if both numbers being added are odd. If you are adding more than two numbers, then the sum will be even as long as there are an even number of odd numbers.
In this case,
...









