SOLUTION: THERE ARE Three traffic signal on a road first signal turns red after 5 minutes while the second and the third turn red after 7 and 10 minutes respectively. if they turn red togeth

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Question 956342: THERE ARE Three traffic signal on a road first signal turns red after 5 minutes while the second and the third turn red after 7 and 10 minutes respectively. if they turn red together at 8:00 am when will they next turn red together.
Answer by Alan3354(69443) About Me  (Show Source):
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THERE ARE Three traffic signal on a road first signal turns red after 5 minutes while the second and the third turn red after 7 and 10 minutes respectively. if they turn red together at 8:00 am when will they next turn red together.
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It's the LCM (Least Common Multiple) of the 3 times, 5, 7 & 10
--> 70 minutes.
8:00 + 70 = 9:10