Enigma 1409: On target
27 July 2013
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From New Scientist #2569, 16th September 2006
At the initial stage the soldiers Ike, Jay and Kay were at three different points equidistant from their target. At that stage Ike was 4 kilometres from Jay and also 4 kilometres from Kay. Then Jay inched forward towards the target but stopped short at another point also 4 kilometres from Ike. At this second stage the distances between any two of Ike, Jay, Kay and the target were all whole numbers of kilometres.
At the second stage how far apart were Jay and Kay?