Henry Ernest Dudeney - 536 Puzzles and Curious Problems.pdf

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536 PUZZLES &
CURIOUS PROBLEMS
BY
Henry Ernest Dudeney
EDITED BY MARTIN GARDNER, EDITOR OF
THE MATHEMATICAL GAMES DEPARTMENT,
Scientific American
Charles Scribner's Sons· New York
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COPYRiGHT © 1967 CHARLES SCRIBNER'S SONS
This book published simultaneously in the
United States of Amenca and in Canada-
Copynght under the Berne Convention
All nghts reserved No part of this book may
be reproduced in any form without the per-
mission of Charles Scnbner's Sons
Printed in the United States of Amenca
LIbrary ofCongress Catalog Card Number 67-15488
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Contents
INTRODUCTION
vii
ARITHMETICAL AND ALGEBRAICAL PROBLEMS
Money Puzzles
Age Puzzles
Clock Puzzles
Speed and Distance Puzzles
Weight Puzzles
Digital Puzzles
Skeleton Puzzles
Cryptarithm Puzzles
Miscellaneous Puzzles
3
II
14
16
30
32
43
47
50
GEOMETRICAL PROBLEMS
81
Triangle, Square, and other Polygon Puzzles
Circle Puzzles
Dividing-the-Plane Puzzles
Plane Geometry Puzzles
IOI
104
v
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vi
Contents
Solid Geometry Puzzles
106
Dissection Puzzles
112
Paper Folding Puzzles
127
Moving Counter Puzzles
130
COMBINATORIAL AND TOPOLOGICAL PROBLEMS
139
Magic Square Puzzles
141
Magic Star Puzzles
145
Liquid Pouring Puzzles
149
Route and Network Puzzles
152
Point Alignment Puzzles
164
Map Coloring Puzzles
169
Miscellaneous Combinatorial Puzzles
170
GAME PUZZLES
183
DOMINO PUZZLES
189
MATCH PUZZLES
199
UNCLASSIFIED PUZZLES
209
ANSWERS
223
INDEX
417
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