Description
A group of attentive children is told that some of them have muddy faces. Each child can see the faces of … 展开

Description
In Josephine's Kingdom every woman has to pass a logic exam before being allowed to marry. Every married woman knows about the fidelity of every … 展开

Description
A number of players are each wearing a hat, which may be of various specified colours. Players can see the colours of at least some other players' … 展开

Description
In this variant there are 3 prisoners and 3 hats. Each prisoner is assigned a random hat, either red or blue. Each person can see the hats of two others, but not their own. On a cue, they each have to guess their own hat color or … 展开

Description
The King called the three wisest men in the country to his court to decide who would become his new … 展开

Description
At the Secret Convention of Logicians, the Master Logician placed a band on each attendee's head, such that … 展开

Description
Four prisoners are arrested for a crime, but the judge offers to spare them from punishment if … 展开