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
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