Professor Szekeres was responsible for starting Parabola in 1964 (before High School students of today were born!)
Issue 2
The Travelling Salesman Problem (TSP) is to find a tour of $n$ cities which minimizes the total cost of the tour.
Issue 3
I drive about an hour each way to work each day through heavy commuter traffic. Some days I can do the trip in under forty minutes whereas on other days it may be closer to two hours.