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3 years ago

14

A red blinking light blinks every 18 seconds, while a yellow blinking light blinks every 12 seconds. If both lights start at the

same time, after how many seconds will they next blink at the same time? A) 6 B) 18 C) 36 D) 54

2 answers:

Nikolay [14]3 years ago

5 0

Least common multiple because that's when the numbers meet....... so the answer is C.

Mice21 [21]3 years ago

4 0

Option C, 36, because it is the LCM (Least common multiple)

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