Medium
Insect Riddles
18 XP

The Three Switch Problem

3,207 solved 50% solve rate 50% fail rate
Three switches outside a room control three bulbs inside. You may flip switches as much as you want but enter only once. How do you identify each switch?
Only 50% solve this correctly
3,207 attempts
Earn +18 XP for solving
Quick Answer & Explanation
Turn switch 1 ON

The answer to this riddle is Turn switch 1 ON. Difficulty: Medium · Solved by 3,207 puzzle lovers.

Turn switch 1 ON for 10 minutes, then OFF. Turn switch 2 ON. Enter. The warm off bulb is switch 1. The on bulb is switch 2. The cold off bulb is switch 3.
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