An IQ test here for you all




John is in a big mansion and he needs to match out the three switches located on the top floor for the three light bulbs located at the ground floor (not visible from top floor) but he can only get down once to check out the bulbs. No other devices were used, only hands.

More details:
There are 3 switches on the top floor - switch A, switch B and switch C and they were used to switch on the 3 light bulbs located at the ground floor. John needs to find out the switch for each of the bulbs but he can only get to the ground floor once to check the bulbs.

- Nothing tricky.
- Nothing to do with the wiring.
- John is alone in the mansion.
- No other devices were used for the checking.
- The switches are normal type which can only be on/off.


HERE GOES THE QUESTION

How John managed to know which switch goes to which light bulb by getting down once only. It is a test from a friend. Do you guys know the answer? Comment please.

4 Comments:

  1. Scud said...
    Is that John's mansion? If it is then he would probably knew it already right?
    C said...
    john switches on switch A say, for 10minutes. next he switches on switch B, for the same amount of time as switch A. next, he has to switch on switch C for 10 minutes too.

    he then heads down to the bulbs, feeling the temperature of every bulb. by feeling the temperature of individual bulbs determines which switch goes with the light bulb.

    i hope i'm right on this.
    Robin said...
    yeong got the right answer. How long it takes for you to figure that out? I gave up for this test actually hahaha.

    scud:nice try :)
    Unknown said...

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