cocolover154 cocolover154

26-03-2018
Mathematics

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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

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JasonLai JasonLai

26-03-2018

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

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chasemanley25 chasemanley25

26-03-2018

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

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