5294169
9780486454740
Well-known & much treasured among puzzle aficionados, Professor Hoffman's 1893 collection of puzzles features both old favourites & new brainteasers. Including both arithmetic problems & challenges involving words & letters, these perplexing highlights from the original edition abound in Victorian charm.Hoffmann, Louis is the author of 'Professor Hoffmann's Best Math and Logic Puzzles ', published 2007 under ISBN 9780486454740 and ISBN 0486454746.
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