Can you figure it out?
(https://scontent-a-vie.xx.fbcdn.net/hphotos-prn2/t1.0-9/1743548_10152204070577777_1459267932_n.jpg)
Remember to use spoilers for the solution.
Now I one-up you:
6 + 5 = 1
68 + 25 = 3
10 + 1 = 1
888 + 10001 = 9
9 + 0 = 2
I don't know if there is an equation for this, but:
6-4 = 2
6+4 = 10
so you combine the answers 2 & 10 to get: 210
7-6 = 1
7+6 = 13
1 & 13 to get: 113
For KK20's
Last digit of the solution

Edit: Nvm the last one totally threw me off
omg you fell for it :rofl:
I'm omitting another essential part to the puzzle, but it makes it too easy (despite some people claiming it took them 10 minutes with it anyways).
EDIT: Hints anyways. Professor Layton style.
It is said that young children, perhaps even pre-schoolers, can solve this puzzle. This was the thing I removed from the original puzzle.
Think like a child. Clearly, if 5-year-olds can do this, they do not possess much knowledge of math. Or spelling for that matter.
Try something most children know how to do: count. Look at the last equation. Do you see anything that you can count that would equal 2?
Ah HA! It is the number of circles. 6 + 5 = 1 because 6 has 1 circle. 9 + 0 is 2 because there are 2 circles

Though, I've already seen your puzzle once already.
It took me like 10 seconds the first time I saw it. :P Seriously though, that first hint was a dead giveaway. And yet it's funny to watch people completely ignore it anyways.
EDIT: Posting original: http://motleynews.net/2012/03/24/can-you-solve-this-problem/
No, the first hint just puts pressure on. xD The last one is a giveaway. I can't remember how long it took me the first time. Might have been 5 or 10 minutes. Maybe even longer.