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17th century mathematician, Fermat, solved an old puzzle: that the square of a whole number could be split into 2 other squares of whole numbers - 5 squared equals 4 squared plus 3 squared - but it couldn't be done with cubes. His solution was lost but a Briton has now solved it and Aczel tells the story of this scientific mystery.
Short-listed for Rhone-Poulenc Science Books Prize 1998.