LOL, I did one or 2 of those every week starting in the 3rd grade. I suppose probably hundreds over the years. Those don't fit in TES, I don't think. That's a kid level genius puzzle, right there. Lucky for me, I am a genius, so they're easy.
If you'd like to see some good ones, check out the MENSA website.
As for how hard Skyrim's hardest puzzles should be....I think none should be harder than the hardest ones from AC2 and ACB (Assassins Creed).
I agree that that "einstien puzzle" is pretty easy and rudimentary if you use a paper and pencil(like i said in my post, i solved it when i was a kid). I just remembered how it said only 2% of the pop could solve it (which is bogus).
But i think some kind of mystery type puzzle like that could fit into TES. It would require some thinking.
Those Tests on Mensa were basic IQ tests. I took the "Mensa Workout" and I got 28 out of 30 on it, and no paper or pencil needed. The "7 D of the W" type-Mensa-test i found on a mirror website i got 27 out of 32. And i didn't even have breakfast today.
I was in Gifted (meaning advanced not "special") when i was in grade school though. That barely means anything IMO however, because i knew some dumb people in Gifted. apparently I had to of received above a 130 on some standardized IQ test, but my parents never told me or my brothers my exact score (who all 3 were ALSO in gifted), so i guess I'll never know if I'm a genius or not...
A genius has to be like 160-200 if people had to get above a 130 to be in gifted. I know I'm no genius as well as most of the other people that were in there.
My point is, I would like something like that Einstein-Test-puzzle (if put into a different context, like a murder mystery) more than lame IQ-type-"which shape comes next"-puzzles.