Braingle Lite



The Right Switch

Category:Logic
Submitted By:Noctus
Fun:*** (2.97)
Difficulty:** (2.09)



In front of you are three light switches. Only one does anything, and it turns on the light downstairs. From here you can't see the light, and it makes no sound. You must determine which switch operates the light, BUT you can only go check it once. How do you figure out which switch is for the light?

Hint:

Patience is a virtue.

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Comments on this teaser


Posted by Adamko10/08/02
Love this puzzle. Didn't take too long to answer but still great

Posted by Rowsdower12/24/03
Clever! 8)

Posted by boodler11/25/05
'fraid I'd no idea! excellent! :wink:

Posted by stephiesd12/15/05
wow. i was off.

Posted by choptlivva12/16/05
Cool!!! (pun intended) :lol:

Posted by musicmaker2111301/19/06
But... what if it's a fluorescent light bulb? :lol: Just kidding... great teaser! :D

Posted by magicumbreon02/06/06
That is really sneaky!

Posted by jntrcs03/27/06
I didnt know that was a possibiblity

Posted by Vigo9503/28/06
i liked this alot !!!

Posted by warmonkey31803/29/06
wow..i didnt get that one, it was really good! :D

Posted by Mellew03/30/06
this wasnt my first time doing this one but on my first time i actuaky got it rite :D :D :D

Posted by TehIgnored04/02/06
That's an electricians riddle my cousin told me....it took me about 10 minutes to get it when he told...but I finally did..... I'd heard it before, but I based the difficulty on that....not that I knew the answer.... WONDERFUL TEASER...i love this one

Posted by elshawno05/09/06
loved it... although I heard it a long time ago, I forgot...

Posted by McGee05/09/06
classic, already knew it in about 5 other styles.

Posted by Zealot08/01/06
awww, i had no idea. 'twas a good one

Posted by scallio08/01/06
Awesome teaser! Didn't get the answer, but it is a great teaser! :D :D :D :D

Posted by OldChinaHand08/01/06
Simple, flip a switch, send the wife down to check, flip another switch, send the wife down again until you find the right one; then you go down once to make sure, you know how wives are. Then you take your hammer and smash the other two extra switches to pieces...right? But really, this was a fun teaser to solve. 8)

Posted by marschie08/01/06
Very, very clever ...but what if it's an office building with a high ceiling?? All the "what-ifs" in the world won't change the cleverness of this teaser. Good job!

Posted by bluehawk08/01/06
:o OOOOOOKKKKKAAAAAYYYYY!!!!! Not real logical to me, but ,,,,,,,,,,, OOOOOKKKKKAAAAAYYYYY!!!!!!!!! :o :wink: 8)

Posted by utnative08/01/06
:oops: :oops: i'm not a logical thinker i guess. i wasn't even close. good teaser, poor solver :oops: :oops: :wink:

Posted by curious_george08/01/06
Darn... I was going to submit this exact riddle once I got enough points... Oh well :D

Posted by pating08/01/06
i like this teaser, even though i heard it before. :D you just know there's got to be a twist somewhere.

Posted by underherfeet08/01/06
To all, you are only checking once, flip first switch on then off, then flip second, then go down, warm, was first, on, is second, off, it's third, if none work, wrong set of switches?

Posted by bradon18200108/01/06
Interesting. I sure didn't come up with the right answer. :o

Posted by jkramer47008/01/06
You could always turn them all on and just not care witch one it is.

Posted by coachpisco08/01/06
I thought you could only flip the switches once. So if I checked and the light was on, fine. If not, I went back and flipped the last switch. I guess I mis-read the instructions. :( :-?

Posted by cyberstar515008/01/06
Flip 'em all. Teaser solved. :D :lol:

Posted by kcheer249308/01/06
That didn't even cross my mind! Very Creative. Thanks :D

Posted by Badger08/01/06
I think the logic is clever and flawless... Didn't get the answer, though! I had the wife & kids downstairs with walkie talkies... Had the switch dismantled with a volt/ohm meter at the ready(lol). I like the logic & situation probs. Broke my daily streak on this one. Good job! Too bad it sounds like an oldie. Thanks! :D :D :D

Posted by monkeygrl9908/01/06
I think that this one was really hard, because I wasn't even thinking about tthe answer!

Posted by FeaerFactorY66608/01/06
ahah!! verry nice!!! :D

Posted by enjaytee08/01/06
What does it matter if two of the switches don't work. Just turn them all on. It was a good teaser tho :wink:

Posted by Neek08/01/06
Great logic puzzle. Of course, I didn't get it. I'm pretty sure I haven't solved any of the logic puzzles at all. I'll keep trying.

Posted by Pizzazz2u08/01/06
Very cleverly thought out teaser! I did know the answer beforehand, which made it easy for me to know the outcome. :wink: But, to other individuals, it does make them think. Keep them coming! I have had some clever teachers during my years, including young kids and older kids. :wink:

Posted by iteachkids08/01/06
OldChinaHand, you are a STITCH! :lol: My only question is this - what if I can't reach the bulbs to touch them???? Hope there's a ladder in there!

Posted by speedqueenkmw08/01/06
I'd just wait for a helper downstairs. :roll:

Posted by heyman08/01/06
I agree with BeeneB. Because of the wording one would not have been able to give the same answer as the writer. I came to a different conclusion. My conclusion was based not on using the light to go downstairs but to know which switch turned the light on. My analysis is: Turn on any light. Go down stairs. If it is on then there you have it. If it is not, then turn on another, then go downstairs not for checking but to use the light. If it is off, then you know the last one was the right one!

Posted by unConfuseMe08/01/06
:-? i didn't care for this one...

Posted by wizkid08/01/06
I've solved this one before but a different way.

Posted by shawneeo08/01/06
I thought this was great! I never heard it before, and I didn't get it, but its perfect as far as I'm concerned. some of you, I don't think you have any idea what you're talking about! I mean... REALLLLLLY! Thanks aa lot, loved it, good-o! :D

Posted by kwelchans08/01/06
How do we know that the light is off to begin with?

Posted by c_rae08/01/06
Unfortunately I didn't get it. I really had to read the answer closely and reread the puzzle in order to understand it. :oops: I guess I need more coffee!! Good teaser! :D

Posted by kman61308/01/06
Excellent puzzle. It stumped me!

Posted by doka1308/01/06
interesting :)

Posted by AZTTT08/01/06
Nicely done! :D I had considered putting a glow-in-the-dark sticker nearby, then doing the same thing with the first two switches. Your hint cued me in on the heat thing. Great job!! keep em coming! :) :o :D

Posted by ItsJustWildman08/01/06
Grew impatient and cheated. :oops: But good teaser! :D

Posted by FulanitoGM08/01/06
It took 27 comments for someone to finally say the totally obvious answer: "turn them all on." If the other two don't do anything, like the teaser says, what does it matter if they're switched on? I think the solution makes life harder than it already is! I'm just sayin'... :D

Posted by somnambulist08/01/06
This was a good one!

Posted by labsmith08/01/06
That was a great teaser. I thought of checking the voltage meter, wondered if the switch could get warm, didn't think it was possible any other way. Darn,I didn't get it.

Posted by HScott1308/01/06
Clever! Didn't think of that.

Posted by syracuse94508/01/06
veryyy clevr... th@ idea nvr crossd my mind, of course... haha... it took me a cuple of reads 2 get the solution, but aftr, i was, lyk, "o my gosh, th@ makes sense! now i feel s2pid"... :wink: good job!

Posted by temisho08/01/06
i have a friend who always tell riddles like this one! so i've heard it before, but its cool.

Posted by jabdr08/01/06
I thought I was sooo clever. I picked the 'right' switch (not the left one or center on) because logic told me the Answer was in the title. The RIGHT switch. Yes, I feel pretty dumb now!! 8) :( :)

Posted by jcann08/01/06
How can "Turn them all on" be right? The question doesn't say that your job is to turn on the light, but to determine which switch controls the light. If you flip them all, of course the light will be on, but you still will not know which switch did it! :o

Posted by thimblenoggin08/01/06
:D If I could only switch on the light bulb over my head! :D

Posted by Musikman21208/01/06
That was kinda different. I liked it though.

Posted by naeem_ng08/02/06
Oooh, good one! :D

Posted by RRAMMOHAN08/04/06
Couldnt get the answer despite two days of sporadic thinking. Good teaser based on common knowledge. Made us all think:some with success, some without!

Posted by ragdol1308/07/06
wow i have no idea wtf that teaser meant...but cool..? i guess

Posted by ragdol1308/07/06
y not just turn them all on at the same time yo?

Posted by lmurray08/08/06
XIEXIE NI! THANK YOU! HEN HAO! VERY GOOD. I APPRECIATE THIS ONE, I REQUIRED A LITTLE THOUGHT. PLEASE KEEP THEM COMING. :) :) :P

Posted by vlerma08/08/06
:DHeavenly days, Imurray the light does shine for you. Great teaser, that I hadn't heard before so let's just say "I Saw the Light." :lol:

Posted by expertcoder08/12/06
That was funny.

Posted by luvdoritos70609/05/06
that is very smart....i probably would have never gotten that if i had to do that

Posted by Qrystal09/18/06
Ooo, I forgot I fave'd this one awhile back, and now I'm here to say how awesome I think this teaser is. Upon reading the comments, I have to agree that kwelchans has a good question. There is no way for us to know that the light was off to begin with, and the whole situation is thrown off if the light was on. (Then we'd HAVE to put up an uncharged glow-in-the-dark sticker in the room before heading up to the lightswitches...) I think we have to say that the light was off to begin with.

Posted by ciotog11/18/06
Besides to make this a teaser, why can you only check once? Surely if you can only check once, you don't have the luxury of time as suggested in the answer. Perhaps I just expect too much, but I can't help thinking that the world would be a better place if everyone had higher expectations.

Posted by Jimbo03/11/07
I'm glad I don't have to live wih some of these whinging pedants. I thought it was an excellent logic teaser. Simple explanation and clever. :P

Posted by jin10doh05/17/07
One of the best teasers I've ever done! Very creative! Kudos! :D

Posted by princesspt09/28/07
sweet! very very creative teaser! :D

Posted by biztycl12/25/07
The 3 switches is already written by someone else too. One more solution, turn first one on, second one off, and the third one flick it 1 million time (since there is no restriction on how many times you could flick it) and the 3rd bulb will guarantee to blow because it has limited life span to be turn on X number of times and there you have your 2nd solution - 1st on, 2nd off, 3rd BLOWN.




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