Art Benjamin jots down the first 60 decimal points of Pi at the 5th USA Science and Engineering Festival at the Walter E. Washington Convention Center in Washington D.C. on April 7, 2018. Benjamin is an American mathematician who specializes in combinatorics. Since 1989 he has been a professor of mathematics at Harvey Mudd College, where he is the Smallwood Family Professor of Mathematics. He is known for mental math capabilities and "Mathemagics" performances in front of live audiences. His mathematical abilities have been highlighted in newspaper and magazine articles, at TED Talks and on the Colbert Report. (Photo by Jeff Malet)

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