Five original riddles to try out at home, in the classroom, or on the go
Are you sure you want the answers? Double sure?
Harder riddles for those who need a bit more of a challenge
Only check the answers when you really, really, really have to!
Professor Mo's favourite selection from Quicksmiths fans
Brain on fire? Try these nice soothing answers...
We all know Professor Mo loves a good riddle. If you have an original riddle to share, send it through using this form and he'll see if he can solve it.
The very best ones will get taught in his Quixology class, and added to a special Quicksmiths download compilation for puzzlehounds.