Question : A city has a tyrant king. The king hates people with blue eyes. So one fine day, he commands all blue eyed people to commit suicide. The people are so loyal to him that the blue eyed ones desperately want to kill themselves. Unfortunately, there is no way a man can know the color of his own eyes. There are no mirrors etc. in the city. How many days will it take for all the blue eyed people to die? A given fact is that there is at least one blue eyed man in the city and another given fact is that all the people are really really intellegent.
Answer : Sorry guys, I don’t know the solution. If you know, please post as comment. I can update here.