In a big town, there's a law that requires every coffee kiosk to be 1,000 yards (measured in a straight line, of course) from every other coffee kiosk in town.
What is the maximum number of coffee kiosks allowed under the law, and how would they be arranged?
Solution to the Problem:
Here is the solution:The maximum number of kiosks is four, arranged at the corners of a regular tetrahedron (triangular prism) having an edge 1,000 yards long.
For example, three kiosks could be arranged in an equilateral triangle and the fourth at the top of a tall building (or the bottom of a deep hole).
Correctly solved by:
| 1. Davit Banana | Istanbul, Turkey |
| 2. Dr. Hari Kishan |
D.N. College, Meerut, Uttar Pradesh, India |