Mathematical Excursions: Side trips along paths not generally traveled in elementary courses in mathematics

Table of Contents:

Introduction
I. On Dividing 1
II. Different Ways Of Writing Numbers 13
III. Multiplying Without The Multiplication Table 23
IV. Mostly On Squares 32
V. The Charm Of Decimals 44
VI. Is This Formula True 62
VII. Magic Squares 67
VIII. A Few Remarks On Measuring And On Incommensurable Numbers 77
IX. Some Facts About Pi 82
X. Geometrical Arithmetic 92
XI. Oddities Of Numbers 108
XII. Equations With Many Answers 119
XIII. Drawing A Straight Line Without A Ruler 128
XIV. The Impossible In Mathematics 137
Answers To Some Of The Problems 144