I solved this puzzle!! I got the answer right too! And it took me about an hour. I used to do logic problems all the time. They were my favorite in elementary school. I used to be in 'Enrichment' where every Friday a few other students and myself would get to miss the last half of class and sit around and do logic puzzles and stuff like that.. I. LOVED. IT. It was my favorite part of the whole week... anyway
A little bit about said puzzle:
This brainteaser, reportedly written by Einstein is difficult and Einstein said that 98% of the people in the world could not figure it out. Which percentage are you in?