## 1 June 2017

### Eight

$8$ is a composite number.

$8$ is a perfect cube: $8=2^3$.

$8$ is a Fibonacci number: $8=3+5$.

$8$ is the base of the octal system, widely used in Computer Science.

An octagon is an $8$ sided polygon.

An octahedron is a polyhedron with $8$ faces.

A cube has $8$ vertices.