Imagine a card trick where two people pick random cards from a deck, add up the numbers on the cards, and tell the mathemagician the total obtained. The mathemagician immediately names the two cards, values and suits! In this hangout you'll learn how to baffle your friends and relatives with this original creation of mathemagician Colm Mulcahy.
Suggested grade levels: Middle-High school students
Interested teachers, please sign up here: http://goo.gl/yjOhpl
Biography: Colm Mulcahy is a professor of mathematics at Spelman College, in Atlanta, where he has taught since 1988. He's currently visiting American University in Washington, D.C. Over the last decade, he has been at the forefront of publishing new mathemagical principles and effects for cards, particularly in his long-running bimonthly Card Colm column for the MAA. Some of his card effects have been featured in The New York Times Numberplay blog. His book Mathematical Card Magic: Fifty-Two New Effects was published by AK Peters/CRC Press in 2013.
Mulcahy’s interests are broad, ranging from algebra and number theory to geometry. He earned a B.Sc. and M.Sc. in mathematical science from University College Dublin in his native Ireland, and a Ph.D. from Cornell University for research in the algebraic theory of quadratic forms, under Alex F.T.W. Rosenberg.