I like this mod very much - but I'm unable to solve any of these riddles with these 25 pressure plates

The hints given up to now aren't helpfull to me, maybe I'm too stupid...
Please give a direct solution!
Thanks a lot for this unexpected and very helpful hint!Dr.Disaster wrote:Type "25 pressure plates" in the "Search this topic..." box and hit enter ..
Find the Upper Catacombs' hidden exit.coreystinson wrote:Can someone give me a hint as to how to get into the Study in the Upper Catacombs?