17 July, 20:00
Two neon lights are turned on at the same time one blinks every 5 seconds and the other blinks every 8 seconds when will both blink at the same time
17 July, 20:17
Answer: 40 seconds
They have that multiple in common
17 July, 21:42
Just find the lowest common multiple of 5 and 8.
LCM [5, 8] = 40
At 40 seconds, both lights will blink at the same time.
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