CONTENTS
ACKNOWLEDGMENTS vii
Introduction 1
The Riddle of the Sphinx 5
Alcuin’s River-Crossing Puzzle 27
Fibonacci’s Rabbit Puzzle 47
Euler’s Königsberg Bridges Puzzle 67
Guthrie’s Four-Color Problem 85
Lucas’s Towers of Hanoi Puzzle 105
Loyd’s Get Off the Earth Puzzle 125
Epimenides’ Liar Paradox 141
The Lo Shu Magic Square 159
The Cretan Labyrinth 177
ANSWERS AND EXPLANATIONS 191
GLOSSARY 237
INDEX 243
ACKNOWLEDGMENTS
I wish to thank the many people who have helped me, influenced me, and
critiqued me over the years. First and foremost, I must thank all of the students
I have had the privilege of teaching at the University of Toronto. They
were a constant source of intellectual animation and enrichment. I must
also thank Professor Frank Nuessel of the University of Louisville, for his
unflagging help over many years. I am, of course, grateful to the editors at
John Wiley for encouraging me to submit this manuscript to a publishing
house that is renowned for its interest in mathematics education. It is my
second book for Wiley. I am particularly grateful to Stephen Power, Jeff
Golick, and Michael Thompson for their expert advice, and to Kimberly
Monroe-Hill and Patricia Waldygo for superbly editing my manuscript,
greatly enhancing its readability. Needless to say, any infelicities that this
book may contain are my sole responsibility.
Finally, a heartfelt thanks goes out to my family, which includes Lucy
(my wife), Alexander and Sarah (my grandchildren), Danila (my daughter),
Chris (my son-in-law), and Danilo (my father), for the patience they have
shown me during the research and the writing of this book. I truly must beg
their forgiveness for my having been so cantankerous and heedless of family
duties.
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