Solve these puzzles by comparing the set of 6 boxes on the left to the set of six boxes on the 
right and finding the difference between the two sets.
For example, all the #s in the boxes of one set could be even, while the ones in the other set 
could be odd. The answers are provided, but you may find a different solution (though I only had 
one solution in mind).


(I got the idea for the type of puzzles from a book called Pattern Recognition. Eventually I will 
look up the author and cite it, I just have't yet. But I still wanted to make it clear that I did 
not invent this type of puzzle.)