Math

My watch is 1 second fast each hour and my friend's watch is 1.5 seconds slow each hour. Right now they show the same time. When will they show the same time again?

Who ever answers my ?, please tell me how.

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  1. DrWLS explained this answer in this post this afternoon.

    http://www.jiskha.com/display.cgi?id=1194714819

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    Ms. Sue

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