Book:David Wells/Curious and Interesting Puzzles

Contents

 * Acknowledgements
 * Introduction


 * The Puzzles


 * The Solutions


 * Bibliography
 * Index



Rational Number Expressible as Sum of Reciprocals of Distinct Squares
The Puzzles: Egyptian Fractions

Think of a Number: Rhind Papyrus $28$
The Puzzles: Think of a Number

Division of Triangular Field
The Puzzles: Dividing a Field: $12$

Greek Anthology Book $\text {XIV}$: $7$
The Puzzles: Light Reflected off a Mirror: $19$

Workman Example
The Puzzles: Light Reflected off a Mirror: $20$

Inscribing Equilateral Triangle inside Square with a Coincident Vertex
The Puzzles: Abul Wafa : $38$

Dissection of 2 Regular Hexagons into One
The Puzzles: Abul Wafa : $41$

Note on Xugu Zhaiqi Suanfa
The Puzzles: Sun Tsu Suan-Ching

Josephus Problem: Turks and Christians Variant
The Puzzles: The Josephus Problem: $99$

Proper Integer Heronian Triangle whose Area is $24$
The Puzzles: Bachet: $111$

Arrange 3 Knives to Rest on Tips of Handles: Variant
The Puzzles: Henry van Etten: $112$

Balance a Stick on its End on a Finger
The Puzzles: Henry van Etten: $113$

Trefoil Knot in Paper forms Pentagon
The Puzzles: Henry van Etten: $126$

Relative Likelihood of n Sixes on 6n Dice
The Puzzles: Prince Rupert's Cube: $129$

Number of Derangements on Finite Set
The Puzzles: The misaddressed letters: $130$

Source work progress
* : The misaddressed letters