## Task 2 - 250522

From the Mathcity train station, a bus departs at every full quarter hour and arrives in Knobelhausen after 2 hours.

From there, buses also depart every quarter hour on the same road to Mathcity, where they arrive after 2 hours of travel.

In the morning, the first bus from Mathcity departs at 5:00 AM and the first bus from Knobelhausen departs at 7:10 AM. The bus drivers nod to each other every time they meet on the road.

How many oncoming colleagues does bus driver Franz Freundlich greet on a trip from Mathcity to Knobelhausen, if this trip starts at 10:00 AM?
First, Franz Freundlich greets the colleague who leaves Knobelhausen first after 8:00 AM; last, the colleague who leaves Knobelhausen last before 12:00 PM. Therefore, he greets all those colleagues who leave Knobelhausen at one of the following times:

8:10 AM, 8:25 AM, 8:40 AM, 8:55 AM, 9:10 AM, 9:25 AM, 9:40 AM, 9:55 AM, 10:10 AM, $10:25 \mathrm{AM}$, 10:40 AM, 10:55 AM, 11:10 AM, 11:25 AM, 11:40 AM, 11:55 AM.

These are a total of 16 colleagues.