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Sam Loyd (1841-1911) was America's greatest originator of puzzles. For more than 50 years, his ingenious posers, appearing in innumerable newspaper and magazine articles, stumped …
Choice puzzles by one of America's most ingenious creators of mathematical entertainments, ranging from simple exercises in arithmetic to complex calculus problems
In this unique fusion of logical thought and inimitable whimsy, Over 350 ingenious problems involve classical logic: logic is expressed in terms of symbols; syllogisms and the …
"The classic work on recreational math in English."--Martin Gardner For nearly a century, this sparkling classic has provided stimulating hours of entertainment to the …
Traditional magic squares are squares of numbers in which the rows, columns, and diagonals all add up to the same total. With a voluminous literature going back some 2,500 years, …