This is a collection of original card magic by Jack McCoy that uses a mathematical principle or process inside them. This makes these tricks easy, very easy, and sometimes almost completely self-working. Jack has baffled even magicians with many of these.
Note: These are beyond the self-workers we learned as kids and can be performed to the most sophisticated spectator(s). They are top level, professional class card magic. Some sleight of hand may be required but none difficult and can be learned from various video and magic sites. Some require no sleight of hand. These tricks will have you not only liking their presentations but will have you wondering how they work in the first place.