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If a red light flashes every 3 seconds, a blue light flashes every 4 seconds and a blue light flashes every 5 seconds and they all flashed together at midnight when would be the next time they all flash together?
9 years ago

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Ms. Sue
What is the least common multiple of 3, 4, and 5?

9 years ago
Anonymous
In an hour
9 years ago

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