Question: A smart landscaper is given the task of placing 4 trees so that they are all the same distant away from each other.
How does he do this?
Answer: He puts three trees into a triangle then one on a hill in the middle (this forms a tetrahedron).
Question: A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's weight limit is exactly 10,000 pounds, any more will break the bridge. After going about 80 miles down the bridge a small bird lands on the truck.
Answer: Nothing, after traveling 80 miles the truck will have surely burnt enough fuel to allow the bird to land on the truck without breaking the bridge.