At the bus stop at 10 o'clock met buses No. 2 and No. 9. Bus number 2 runs at an interval of 4 minutes and bus number 9 at intervals of 9 minutes. How many times does the bus meet at 18:00 local time?

Correct answer:

n =  13

Step-by-step explanation:

4=22 9=33  LCM(4,9)=36  t=(1810)60=480 min n=t/36=480/36=13.3313

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