Rules of Stostone: Shade exactly one stone, an orthogonally-connected group of cells, in each region. No two stones in different regions are adjacent. If a number is in a region, it tells the size of that region’s stone. If you let the stones all fall down, they must cover exactly the bottom hal...

Find what comes next in the following sequence: 0,1,4,9,7,7,9,13,10,9,1,? Bonus: What is the rule?

I wonder, if a zebra is white with black stripes or black with white stripes? It won't make it different but is there any answer?

Help! I have outlined a puzzle below, and provided two sources which provide answers. I am disputing that the answer provided in the sources is correct, and I am looking for others to validate or invalidate my reasoning that the sources are incorrect. Puzzle Three logicians (A,B and C) sit in a c...

This is a sequel to Gentrification in Chessshire. Due to the febrile state of the Chesster housing market you and your band of artists and scientists are forced to rent out half your flat to another group of sharers. Keeping every one happy was not easy before and will only become more tricky in ...