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🧠 The Three Light Switches (The Upstairs Mystery)

You are in a basement with 3 on/off switches. Only one controls a light bulb on the top floor (which you cannot see from the basement). You can only make ONE trip upstairs. How can you determine with 100% certainty which switch controls the bulb?

💬 Did you solve this before reading the solution? Be honest in the replies! (Solution in first comment 👇)

#brain #riddle #lateralthinking #physics #logicpuzzle
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