Popular mathematics is mathematical

Mathematics

Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...

 literature aimed at a general audience.
Sometimes this is in the form of books which require no mathematical background and in other cases it is in the form of expository articles written by professional mathematicians to reach out to others working in different areas.

See the main popular science

Popular science

Popular science, sometimes called literature of science, is interpretation of science intended for a general audience. While science journalism focuses on recent scientific developments, popular science is broad-ranging, often written by scientists as well as journalists, and is presented in many...

 page for more elaboration of this definition.

See also Recreational mathematics

Recreational mathematics

Recreational mathematics is an umbrella term, referring to mathematical puzzles and mathematical games.Not all problems in this field require a knowledge of advanced mathematics, and thus, recreational mathematics often attracts the curiosity of non-mathematicians, and inspires their further study...

Books

Some of the most prolific popularizer's of mathematics include Keith Devlin

Keith Devlin

Keith J. Devlin is a British mathematician and popular science writer. He has lived in the USA since 1987 and has dual American-British citizenship.- Biography :...

, Martin Gardner

Martin Gardner

Martin Gardner was an American mathematics and science writer specializing in recreational mathematics, but with interests encompassing micromagic, stage magic, literature , philosophy, scientific skepticism, and religion...

 and Ian Stewart

Ian Stewart (mathematician)

Ian Nicholas Stewart FRS is a professor of mathematics at the University of Warwick, England, and a widely known popular-science and science-fiction writer. He is the first recipient of the , awarded jointly by the LMS and the IMA for his work on promoting mathematics.-Biography:Stewart was born...

. Titles by these 3 authors can be found on their respective pages.

Magazines and journals

• Popular science magazines such as New Scientist
  New Scientist
  New Scientist is a weekly non-peer-reviewed English-language international science magazine, which since 1996 has also run a website, covering recent developments in science and technology for a general audience. Founded in 1956, it is published by Reed Business Information Ltd, a subsidiary of...
  
   and Scientific American
  Scientific American
  Scientific American is a popular science magazine. It is notable for its long history of presenting science monthly to an educated but not necessarily scientific public, through its careful attention to the clarity of its text as well as the quality of its specially commissioned color graphics...
  
   sometimes carry articles on mathematics.
• Plus magazine
  Plus Magazine
  Plus is an online popular-mathematics magazine run under the Millennium Mathematics Project at the University of Cambridge.Plus contains:* feature articles, which describe applications of mathematics to real-world problems;...
  
   is a free online magazine run under the Millennium Mathematics Project
  Millennium Mathematics Project
  The Millennium Mathematics Project was set up within the University of Cambridge in 1999 as a joint project between the Faculties of Mathematics and Education...
  
   at the University of Cambridge
  University of Cambridge
  The University of Cambridge is a public research university located in Cambridge, United Kingdom. It is the second-oldest university in both the United Kingdom and the English-speaking world , and the seventh-oldest globally...
  
  .

The journals listed below can usually be found at your local university library.

• American Mathematical Monthly
  American Mathematical Monthly
  The American Mathematical Monthly is a mathematical journal founded by Benjamin Finkel in 1894. It is currently published 10 times each year by the Mathematical Association of America....
  
   is designed to be accessible to a wide audience.

• The Mathematical Gazette contains letters, book reviews and expositions of attractive areas of mathematics.

• Mathematics Magazine
  Mathematics Magazine
  Mathematics Magazine is a refereed bimonthly publication of the Mathematical Association of America. Its intended audience is teachers of collegiate mathematics, especially at the junior/senior level, and their students. It is explicitly a journal of mathematics rather than pedagogy...
  
   offers lively, readable, and appealing exposition on a wide range of mathematical topics.

• The Mathematical Intelligencer is a mathematical journal that aims at a conversational and scholarly tone.

• Notices of the AMS - Each issue contains one or two expository articles that describe current developments in mathematical research, written by professional mathematicians. The Notices also carries articles on the history of mathematics, mathematics education, and professional issues facing mathematicians, as well as reviews of books, plays, movies, and other artistic and cultural works involving mathematics.

Audio and video

• Simon Singh's Fermat's Last Theorem is available in audio and there is also a Horizon television program.