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oksano4ka [1.4K]
4 years ago
10

A green light blinks every 4 seconds and a yellow light blinks every 5 seconds. At how many seconds will the lights first blink

at the same time?
Mathematics
1 answer:
Nesterboy [21]4 years ago
4 0

Answer:

20 seconds

Step-by-step explanation:

The least common multiple of 4 and 5 is 20.  So the two lights will blink at the same time every 20 seconds.

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