Asked by Celena

One caution sign flashes ever 4 seconds, and another caution sign flashes every 10 seconds. At a certain instant, the 2 signs flash at the same time. How many seconds elapse until the 2 signs next flash at the same time?
A. 6
B. 7
C.14
D. 20
E. 40

5 years ago

Answered by oobleck

LCM(4,10) = 20

5 years ago

Answered by Aryan

noob

4 years ago

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Asked by Celena

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