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Easy · Brainteasers · Quant Trader interview question · logic, brainteaser, problem-solving
You are standing in a room with three light switches. Each switch controls one of three light bulbs in a room upstairs. You may manipulate the switches however you like, but once you open the door to the upstairs room, you cannot touch the switches again. You need to determine which switch controls which light bulb. What is the correct strategy to map each switch to its corresponding light bulb?