4 ms·

Why is the heat thing even necessary? Turn on one switch, walk down, see which light is on, process of elimination for the other one. Am I missing something?

• lucas_ 4y ago
  I remember this version of the riddle: - 1 light bulb and 3 switches outside. Determine which switch powers the bulb while only entering the room once.
  • Izkata 4y ago
    There's also one with 3 switches and 3 bulbs; the solution is the same except you leave the third one on.