POW: 12-18-2017

POW: 12-04-2017

POW: 11-27-2017

POW: 11-20-2017

POW: 11-13-2017

POW: 10-23-2017

POW: 10-16-2017

POW: 10-09-2017

POW: 10-02-2017

POW: 09-25-2017

Riddle:

Answer:

If the girls had been on a standing train, the first girl's calculations would have been correct, but their train was moving. It took 5 minutes to meet a second train, but then it took the second train 5 more minutes to reach where the girls met the first train. So the time between trains is 10 minutes, not 5, and only 6 trains per hour arrive in the city.