A lighthouse blinks every 12 minutes.A second lighthouse blinks every 10 minutes.If they both blink

Discussion in 'Calculator Requests' started by math_celebrity, Apr 28, 2020.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    A lighthouse blinks every 12 minutes.A second lighthouse blinks every 10 minutes.If they both blink at 8:10 P.M., at what time will they next blink together?

    We want to know the least common multiple, so that 12 and 10 intervals meet again. We type in LCM(10,12) into our search engine and we get 60.

    60 minutes is 1 hour, so we add this to 8:10 to get 9:10
     
    math_celebrity, Apr 28, 2020
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