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ahornsey

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ddon

mensa teaser

A 330-yard long train, travelling at 30 mph, enters a two-mile long tunnel. How long will elapse between the moment the front of the train enters the tunnel and the moment the end of the train clears...
12:52 Fri 15th Sep 20063 answers, last by ahornsey 10:03 Sat 14th May 2011

Only 1 question