OMM 1991 Problem 3
Four balls of radius are placed in space so that each of them touches the other three. What is the radius of the smallest sphere containing all of them?
Dataset text AI-MO AoPS. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
Similar problems
These problems have the most words in common with this statement.