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15 July, 11:59

A red string of holiday lights blinks once every 3 seconds while a string of blue lights blinks once every 4 seconds. how many times will both sets of lights blink at the same time in one minute?

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  1. 15 July, 15:44
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    Ince at 12 seconds, 24 seconds, 36 seconds, 48 seconds and again at 60 seconds. For a total of 5 times
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