Puzzles

12 marble pieces and an old style weighing scale

18 or 20 Trees and 2 isolated prisoners

100 greedy pirates and division of treasure

Sharing chocolate and avoid having a rotten piece

Escaping from a hungry dog at periphery of circular field

Surrounded, men decided to kill themselves but one want to live

1000 wine bottles with one having poison and 10 mouses

100 bulb in one room and 100 switches in another room