Some interview questions are notoriously difficult. This particular logic problem has made its appearance at various consulting, investment banking and tech firms (including McKinsey and Microsoft). Will you be prepared if your interviewer springs upon you the knotty "12 ball" dilemma? Thanks to Vault, you can answer in safety!
Here's the question:
You have 12 balls. All of them are identical except one, which is either heavier or lighter than the rest - it is either hollow while the rest are solid, or solid while the rest are hollow. You have a simple two-armed scale, and are permitted three weighings. Can you identify the odd ball, and determine whether it is hollow or solid?
No comments:
Post a Comment