Save Big on Coursera Plus. 7,000+ courses at $160 off. Limited Time Only! Grab it Explore a fascinating 26-minute mathematical video that unravels the secrets behind an seemingly impossible card trick where a magician correctly identifies an unseen card after their assistant reveals just four others from five cards randomly selected by audience members. Delve into combinatorial mathematics and matching theory to understand the mathematical principles that make this trick possible, complete with a systematic method that anyone can learn to perform. Through careful mathematical analysis, discover how concepts from graph theory and Hall's Theorem contribute to solving this magical puzzle, progressing from initial skepticism to a full understanding of the trick's mechanics. Learn the step-by-step explanation of how to execute this impressive feat of mathematical magic, concluding with practical examples that demonstrate the method in action.