| NOTHING _ BUT _ MATHS site by Charavee Bunyasiri |
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| Problem of the Week |
| Train Times In the holidays Karen likes to go north to the forrest, or south to the hills. She doesn't want to waste time so she takes the first train the arrives. There are the same number of trains going north and south, and they run regularly. Karen always arrives at a random time, so she thinks she should go north and south about the same number of times. >>>However, after 60 days(long holiday), she finds that she has gone south 50 times, and north only 10. |