Enigma 1595: All mapped out
17 January 2012
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From New Scientist #2760, 15th May 2010 [link]
My house appears on each of three overlapping local maps. Each map is half a metre square and all are to the same scale. To ease map handling, I have produced a composite version by pasting them on top of one another to form a single sheet which correctly aligns all the roads and other features. I have now trimmed off those parts of the map which I do not need, thereby creating a complete square composite map, almost exactly a whole number of millimetres along each side. As it happens, I could not have produced a larger square even if, instead, the maps had been entirely blank sheets of paper.
To the nearest millimetre, what is the length of the side of the composite map?