For example, in the second puzzle, the arrangement of black-and-white shapes is the same on the left and right pages, but the right page is rotated relative to the left page. Is the question about the shapes as in an ordered collection? Or is the question about the pages in their entirety? These problems tend to be underspecified, and end up being more of a guessing exercise about the authors intentions than anything else.
It still may not be a bad exercise (like art students at a gallery copying a master's work), but you shouldn't get too far ahead of yourself claiming it's some sort of 'exercise in pure reason'.
I stress though, I'm a big fan of these things and the innovations they have enabled, but you still have to understand that they are an axiomatic underpinning. It's like Euclid's parallel postulate in a way: There is non-euclidean geometry out there.