[BigV]

25000 miles = 2*3.14*r ~=
12500 miles = 3.14*r ~=
6000 miles ~= r

sorry, I almost always do the math. I don't keep the radius stored next to the route to the bowling alley because I use it much more infrequently than I do the circumference, and I remember the calculation because it has a permanently reserved spot in my memory as a tool.

Sorry I don't rate Geek Overlord. That's probably because I'm half Nerd on my Father's side.

Pie:

1 -- Congratulations.

2 -- Quick (like a bunny), what point on the earth's surface is furthest from the center of the earth? **spoiler** Chimborazo in the Andes