Wow, I haven’t felt this dumb in a long time. It took me forever to get it, and I still wonder if my method was some convoluted coincidence that just happened to work. Was it more obvious to you? What’s the logic?
I couldn’t answer any of the number-questions (gave up as i didn’t get any answer after a few minutes), but the shapes where pretty easy, if I understood the result correctly. Depends on how the brain is wired, I guess.