## Table of contents of Mathematics

- 81
- Always divisible by 271
- A hardly known factorization
- Children in a car
- Cos 18°
- Divide by zero
- e-i-pi-1-0
- Fickle sequences
- Exact gonio table
- Figures
- Infinite roots
- Integer intersections and tangents
- Parabolas
- Quantized angles in a regular polygon
- A harmonic repeting fraction
- What is math?
- Main table of contents