On 24 Oct, 13:56, (Doug Miller) wrote:

Without knowing what frame of reference is intended by the testmaker, it's not
possible to determine which answer is "correct".

The obvious frame of reference for a question would be that of the
overall question, i.e. "same" means that the fans rotate such that
they don't have a blade speed relative to each other. If we were a fan
shop, then we might well regard "same" differently, as meaning that
they're both clockwise when reading the maker's plate.

Unfortunately thhis common and sensible convention is then defeated by
the balloons question. That only makes sense if we regard each balloon
as being in a separate system.