Paulo Ferro has an MS degree in Mathematics from the University of Coimbra, Portugal. He is a Mathematics teacher as well as an author, checker, and proofreader for several publishers. His puzzles have been published in the NCTM, Plus Magazine, The New York Times, The Guardian, American Scientist, and New Scientist. He also has a Math blog, called ENIGMATH, where he publishes, beyond his puzzles, games, magic tricks, and other posts about Math.
If you are interest in a collaboration with him, please fill the contact form.
