PREFACE v
ARITHMETICAL AND ALGEBRAICAL PROBLEMS 1
Money Puzzles 1
Age and Kinship Puzzles 6
Clock Puzzles 9
Locomotion and Speed Puzzles 11
Digital Puzzles 13
Various Arithmetical and Algebraical Problems 17
GEOMETRICAL PROBLEMS 27
Dissection Puzzles 27
Greek Cross Puzzles 28
Various Dissection Puzzles 35
Patchwork Puzzles 46
Various Geometrical Puzzles 49
POINTS AND LINES PROBLEMS 56
MOVING COUNTER PROBLEMS 58
UNICURSAL AND ROUTE PROBLEMS 68
COMBINATION AND GROUP PROBLEMS 76
CHESSBOARD PROBLEMS 85
The Chessboard 85
Statical Chess Puzzles 88
The Guarded Chessboard 95
Dynamical Chess Puzzles 96
Various Chess Puzzles 105
MEASURING, WEIGHING, AND PACKING PUZZLES 109
CROSSING RIVER PROBLEMS 112
PROBLEMS CONCERNING GAMES 114
PUZZLE GAMES 117
MAGIC SQUARE PROBLEMS 119
Subtracting, Multiplying, and Dividing Magics 124
Magic Squares of Primes 125
MAZES AND HOW TO THREAD THEM 127
THE PARADOX PARTY 137
UNCLASSIFIED PROBLEMS 142
SOLUTIONS 148
INDEX 253