Every hour, on the hour, a bus leaves town A and heads toward town B.
Every hour, on the hour, another bus leaves town B and heads toward town A.
The trip between the two towns takes exactly two hours.
If you’re on a bus traveling from point A to point B, how many busses will you pass?
Note: All buses are on time leaving and arriving.
June 6th, 2011 | Category: 
2. One at 1/4th distance and one at 3/4th distance after 30 mins and 90 mins respectively.
3. One arriving just as the bus you are on is leaving. One at precisely the 1 hour mark. One just as you arrive at the other city.
Nope and Nope.
Keep trying.
One (:
No, your bus is now heading in the wrong direction.
0. You don’t “pass” (as in overtake) any other buses. You do, however, meet a few going the opposite direction.
Five:
Let’s say you left at 3:00 from town A.
At 3:00, you pass a bus which left at 1:00 from town B to A, and just finished its two-hour travel.
At 3:30, you pass a bus which left at 2:00 from town B and is 3/4 its way to town A while you are 1/4 of your way to town B.
At 4:00, you pass a bus which left at 3:00 from town B to A and is halfway just like your bus.
At 4:30, you pass a bus which left at 4:00 from town B to A and is 1/4 its way to town A while you are 3/4 of your way to town B.
At 5:00, you pass a bus which is about to leave town B and traveled no distance while you just finished your trip.
All in all, you passed five buses
no matter what time you started 
Tiffy, you hit the nail on the head!
Five buses is correct, for the exact reasons you’ve stated.
You’re today’s winner.
You pass one bus