A train leave Moscow, crosses Siberia to Vladivostok at noon every day.?

Question

Another trains leaves also daily fromVladivostok to Moscow, in opposit direction at the same time, A train is entering at the same time.in both oposite stations. The trip lasts 10 days, the question is: If you are in a train, how many trains will you enconter going the opposite way? Counting the train that is coming in as you leave and finnish your trip.

Answer 1

Assuming the trains also arrive at noon in each city, 21.

Answer 2

10