Question

Two bus services A and B arrive at a station. Service A has a frequency of arrival of 15

mins while Service B operates with a frequency of 20 mins. The first buses arrive at 8am.
When will they arrive at the station together the next time.

Answer 1

9:00am

Explanation:

Bus A:

8:00, 8:15, 8:30, 8:45, 9:00, 9:15, 9:30, 9:45, 10:00, 10:15, 10:30, 10:45, 11:00

Bus B:

8:00, 8:20, 8:40, 9:00, 9:20, 9:40, 10:00, 10:20, 10:40, 11:00

Bus A and Bus B will both arrive at the bus stop at 9:00