Trains

A train leaves Los Angels for New York every hour on the hour. A train leaves New York for Los Angels every hour on the half hour. The trip takes five hours each way.
As you ride from Los Angels to New York, how many of the trains bound from New York to Los Angels would you pass?

SOLUTiON :

You would pass the first train returning to Los Angels fifteen minutes after you start(you are fifteen minutes out of Los Angels and the other train is due in Los Angels fifteen minutes later) and one each half hour there after.
You will pass ten trains bound for Los angels. -QED-