podcasts, and YouTube channels There are many blogs and audio or video series devoted to recreational mathematics. Among the notable are the following: Cut-the-knot by Alexander Bogomolny Futility Closet by Greg Ross Numberphile by Brady Haran Mathologer by Burkard Polster 3Blue1Brown by Grant Sanderson The videos of Vi Hart Stand-Up Maths by Matt Parker Publications The journal Eureka published by the mathematical society of the University of Cambridge is one of the oldest publications in recreational mathematics. It has been published 60 times since 1939 and authors have included many famous mathematicians and scientists such as Martin Gardner, John Conway, Roger Penrose, Ian Stewart, Timothy Gowers, Stephen Hawking and Paul Dirac. The Journal of Recreational Mathematics was the largest publication on this topic from its founding in 1968 until 2014 when it ceased publication. Mathematical Games (1956 to 1981) was the title of a long-running Scientific American column on recreational mathematics by Martin Gardner. He inspired several generations of mathematicians and scientists through his interest in mathematical recreations. "Mathematical Games" was succeeded by 25 "Metamagical Themas" columns (1981-1983), a similarly distinguished, but shorter-running, column by Douglas Hofstadter, then by 78 "Mathematical Recreations" and "Computer Recreations" columns (1984 to 1991) by A. K. Dewdney, then by 96 "Mathematical Recreations" columns (1991 to 2001) by Ian Stewart, and most recently "Puzzling Adventures" by Dennis Shasha. The Recreational Mathematics Magazine, published by the Ludus Association, is electronic and semiannual, and focuses on results that provide amusing, witty but nonetheless original and scientifically profound mathematical nuggets. The issues are published in the exact moments of the equinox. People Prominent practitioners and advocates of recreational mathematics have included professional and amateur mathematicians: See also List of recreational number theory topics References Further reading W. W. Rouse Ball and H.S.M. Coxeter (1987). Mathematical Recreations and Essays, Thirteenth Edition, Dover. . Henry E. Dudeney (1967). 536 Puzzles and Curious Problems. Charles Scribner's sons. . Sam Loyd (1959. 2 Vols.). in Martin Gardner: The Mathematical Puzzles of Sam Loyd. Dover. . Raymond M. Smullyan (1991). The Lady or the Tiger? And Other Logic Puzzles. Oxford University Press. . External links Recreational Mathematics from MathWorld at Wolfram Research The Unreasonable Utility of Recreational Mathematics by David Singmaster