Imagine you're in a room, and there are three light switches on the wall. These switches control three different light bulbs in another room. But there's a little problem: you don't know which switch turns on which light bulb, and you want to find out without going into the other room multiple times.

Here's a clever way to figure it out:

1. First, let's call the switches A, B, and C, and let's call the light bulbs 1, 2, and 3.

2. Turn on the first switch, which is A, and leave it on for a few minutes.

3. After a little while, turn off switch A and turn on switch B.

4. Now, go into the other room with the three light bulbs. You will see one bulb is shining, and the other two are not.

Now, let's understand what happened:

• If you see one light bulb is on, that's the bulb controlled by switch B.
• The bulb that's off but still warm is controlled by switch A.
• And the bulb that's off and not warm at all is controlled by switch C.

So, you've just figured out which switch controls each light bulb without going back and forth too many times. You used your smarts to solve the puzzle!

Great job! You're like a detective for light bulbs now!