those are impressive even without magical enchantment on it. tho it would be amusing if it's like "even when ppl can use anti magic, they never figure out how to solve cubes"
lol well a 'rubix cube' might look like a strange device in their world/hide stuff but maybe enchanting magic on it makes it harder to solve, or the author didn't wanna design a unique looking one (tho wonder how ppl do it colorblind. then again apparently there are some blindfolded vids of ppl solving it lol)
no. all the challenges given were within what the challenger could accomplish. they said so before the test started. thou, yea. how wude to solve it before he finished explaining it.