Comment Re:not circumnavigation, and not all straight line (Score 1, Funny) 496
The question doesn't say walking in a straight line, just walking west. A circle around the pole is the trajectory traveled when walking westward near either of the poles. The solution around the North Pole also requires walking a curved path. If you walk straight you either end up almost a mile away (if using Great Circles as your definition of "straight"), or exactly a mile away, hovering in the air (if using Euclidean "straight").