Mathematics, 21.07.2020 14:01 justicejesusfreak

Ardem has two lights one flashes every 15 seconds the other flashes every 42 seconds. They start flashing at the same time. After how many seconds will they next flash at the same time??

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Ardem has two lights one flashes every 15 seconds the other flashes every 42 seconds. They start fla...

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