A great site

Another puzzle

Two prisoners are held in a dungeon. One night a mysterious visitor appears in their cell and offers them a chance to escape. It is only a chance because they … Continue reading

March 16, 2014 · Leave a comment

The puzzle

Imagine that four prisoners have been buried up to their necks in desert sand. Each man can see only what is in front of him, and the wall completely blocks … Continue reading

March 8, 2014 · Leave a comment

Silvia Rettaroli