Mathematics
Mathematics, 01.03.2020 13:36, hector87

Two lighthouse
can be seen from the top of the hill the first flashes once every six seconds and the other flashes every once every 15 seconds is the flash how long is it until the first again at the same time

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Answers: 3

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Two lighthouse
can be seen from the top of the hill the first flashes once every six seconds...

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