if two buses left the station at 9am and, one took 20 minutes and the other 24 minutes what time would they both next leave the station at the same time
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9 = 32, 15 = 3 · 5
The least common multiple (LCM) of 9 and 15 is 45.
The next time they both leave at the same time is 45 minutes after 1:25, or 2:10.
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