Lines

Five bus lines run at intervals 3, 6, 9, 12, 15 minutes. In the morning, it suddenly starts at 4:00. After how many minutes do the bus lines meet again?

Correct answer:

x =  180 min

Step-by-step explanation:

3=3 6=23 9=33 12=223 15=35  x=322251=180 min



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