Monthly Archives: June 2011

Prisoners’ problem 6

Three prisoners meet a guard. The guard says: I have hats with me, two of which are black and the others are white. The prisoners ask: “How many hats there are all together?” He says: “It’s a secret!”. The guard … Continue reading

Posted in Combinatorics, Recreation, Wednesday Problem | Tagged | 2 Comments

I am back!

Now I can blog again: the ‘publish’ button returned to the user interface. Let me start the new era of Walks on Math by: * Changing the name of the blog into Walks on Mind * Posting an interview of … Continue reading

Posted in Education, Meta, Philosophy, Popular | Leave a comment