Squigly Squigly's Brain Teasers

Question:

What are the next two numbers in this series: 2, 9, 16, 23, ...

Answer:

30, 37 (Add 7.)

Try another Brain Teaser:

Two trains are on the same railroad track; one is headed east the other west, they both leave the station at 1:00 and are travelling at the same speed. Yet they didn't crash into each other. How can this be?