Enigma 1728: Problem tackling
12 December 2012
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From New Scientist #2895, 15th December 2012 [link]
Joe was in his school’s rugby team. While practising tackling, Joe remembers standing on the goal line 25 feet from his friend Ken, who was by the corner flag. When the master blew his whistle, Ken ran along the touchline and Joe had to try to tackle him. Ken runs at half a mile an hour faster than Joe, who could only manage 12 miles an hour. So Joe never caught up with Ken.
What was the nearest Joe came to Ken?
It is pleasing that Enigma 1728 should be published on 12.12.12, as 1728 = 12³.