Question 885926
The LCM of 2 and 4 is 4


The LCM of 4 and 6 is 12


The LCM of 12 and 8 is 24


The LCM of 24 and 10 is 120


The LCM of 120 and 12 is 120


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This all shows that the LCM of 2, 4, 6,8 10,12 is 120


It will take <font color="red">120 minutes</font> for the 6 devices to beep together once again. They will beep together every 120 minutes.