Question 1208373
<pre>
The sum of any number of evens is even.
The sum of any even number of odds is even. 

Case 1:
If there are 9 or more evens, then the sum of 9 evens will be even.

Case 2:
If there are only 8 or fewer evens (but at least 1 even), then there are 9 or 
more odds.  
Take 8 of those odds and 1 even, and the sum of those 9 will be even. 

PROVED.

Edwin</pre>