We have all been, or will be, sweet 16 at some point and Tennessee Ernie Ford and Johnny Cash both sang about "16 Tons". It's a square number and was the 16 Gun Salute at the Jubliee celebrations in York, UK. It's also the number of ounces in a pound which must be quite mystifying to anyone brought up with the metric system, and it's the number of pieces on a chess team, black or white. It's also the almost incomprehensible:
The 16-cell is the finite regular four-dimensional cross polytope with Schläfli symbol .
It is also known as the hyperoctahedron (Buekenhout and Parker 1998) or hexadecachoron, and
its composed of 16 tetrahedra, with 4 to an edge. It has 8 vertices, 24 edges, and 32 faces. It is
one of the six regular polychora.
Sixteen is the age at which you can drive a car on the highway in most States and, under British Law, the age at which you can do all sorts of wonderful things as outlined on this really neat web-site at Today's Date.