Looking at the comments, I have noticed that a lot of you were confused with #25. It is actually pretty easy. Remember the purpose of all these stumpers is to encourage you to think differently with math. The 1st dozen even #s are 2,4,6,8,10,12,14,16,18,20,22,24. Now find pairs to add that give the same sum for each. Now, you should be getting it. Now, it is too easy. If you are intersted in having more posted, please comment that you are interested and I will find more.