Walked right into the white board interview...interview was for a very specific position and I found out quickly they were actually looking for a previous colleague. I was called back for a second interview for a more fitting but different position. That interview went well up to the point where they asked my these think-out-of-the-box questions...I agreed only if I could ask my own afterward. Theirs I nailed but none of them could answer my puzzle question...Oops!