Problem
The Problem
You have 12 balls, one of which is either heavier or lighter than the other 11 (you don't know which). You have a balance scale.
Find the defective ball AND determine whether it's heavier or lighter, using at most 3 weighings.
You have 12 balls, one of which is either heavier or lighter than the other 11 (you don't know which). You have a balance scale.
Find the defective ball AND determine whether it's heavier or lighter, using at most 3 weighings.