The problems posed here often involve fundamental mathematical methods and notions, but their chief appeal is their capacity to tease and delight. In these pages you will find scores of "recreations" to amuse you and to challenge your problem-solving faculties—often to the limit.Now in its 13th edition, Mathematical Recreations and Essays has been thoroughly revised and updated over the decades since its first publication in 1892. This latest edition retains all the remarkable character of the original, but the terminology and treatment of some problems have been updated and new material has been added.Among the challenges in store for you: Arithmetical and geometrical recreations; Polyhedra; Chess-board recreations; Magic squares; Map-coloring problems; Unicursal problems; Cryptography and cryptanalysis; Calculating prodigies; … and more.You'll even find problems which mathematical ingenuity can solve but the computer cannot. No knowledge of calculus or analytic geometry is necessary to enjoy these games and puzzles. With basic mathematical skills and the desire to meet a challenge you can put yourself to the test and win. "A must to add to your mathematics library."—The Mathematics Teacher

    In 1892's Mathematical Investigations in the Theory of Value and Prices and 1896's Appreciation and Interest, Fisher explores: . how the numbers of consumers and the numbers of available commodities are more mysterious than they seem at first glance . what happens when production and consumption are examined jointly . how commodities influence one another . the relationship between appreciation and debt . formulas for varying rates of interest and appreciation . the impacts of zero and negative interest . and much more. American economist IRVING FISHER (1867-1947) was professor of political economy at Yale University. Among his many books are The Rate of Interest (1907), Why Is the Dollar Shrinking? A Study in the High Cost of Living (1914), Booms and Depressions (1932), and The Purchasing Power of Money (1912).