5x12 pentomino tiling

Pentominoes

A pentomino is a polyomino composed of five congruent squares, connected along their edges (which sometimes is said to be an orthogonal connection).

There are twelve different free pentominoes. Ordinarily, the pentomino obtained by reflection or rotation of a pentomino does not count as a different pentomino.

I discovered pentominoes as a nerdy kid, probably when I read one of Martin Gardner's books based on his "Mathematical Games" columns in "Scientific American". Many of them are still available and I recommend them to anyone who has a mathematical mind (or whose children have).

The logo at the top of each of my pages is one example of a 5x12 tiling of free pentominoes and the the strip at the bottom is repeated copies of a 3x20 tiling.

Pentominoes tiled in various ways

The logo and strip are derived from the above work by a Wikipedia contributor and are used under a Creative Commons licence. See here for the gory details.

Wiblog:
The Whisky Advent Calendar

My Christmas present to me was a Masters of Malt whisky advent calendar. So this was 24 30ml bottles of whisky for £119.95 so that's 720ml or about a bottle of whisky in total and for that price it seemed pretty reasonable to try so different whiskies.  read more ...

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The Scottish Clearances: A History of the Dispossessed, 1600-1900 by T. M. Devine In Plain Sight by Marion Todd

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