SOLUTION: the light from one lighthouse flashes every 8 seconds while the other light house flashes every 15 seconds. they flash together at midnight.what is the time when they next flash to

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Question 562410: the light from one lighthouse flashes every 8 seconds while the other light house flashes every 15 seconds. they flash together at midnight.what is the time when they next flash together?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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he light from one lighthouse flashes every 8 seconds while the other light house flashes every 15 seconds.
they flash together at midnight.what is the time when they next flash together?
:
Find the Least Common multiple of 8 and 15
Prime factor 8: 2,2,2
Prime factor 15: 3*5
LCM: 2*2*2*3*5 = 120 seconds, 2 minutes.
:
they will flash together at 12:02 AM