The Light Switches Brainteaser

Firms are going to use tricks like this to try to weed out people who freeze, but if you stop and think about it, most of the questions you are ever asked on an interview are pretty logical.  You just have to take a moment.  Take a deep breath.  Don’t be frozen because someone is sitting there and watching you.  Just use that brain of yours and figure it out. 

You’re going to enter a room.  There are 3 light switches.  You can only enter one time and which switch controls which bulb? 

Now, you cannot use the obvious dumb answer– turn on each switch and you’ll know which one does it.  You have to figure it out a little differently.

So, this is how the answer works.  You turn on two switches and leave them on for a while.  Then, what you do is turn off one switch.

Now, obviously, the bulb that still on is controlled by the switch that you turned on stayed on, right?  You, then, touch the other bulbs the ball that’s warm is controlled by the switch you turned off, right?

Then, the 3rd switch controls the 3rd bulb.  It’s very easy, isn’t it?

 

Ⓒ The Big Game Hunter, Inc., Asheville, NC 2020

 

ABOUT JEFF ALTMAN, THE BIG GAME HUNTER

Jeff Altman, The Big Game HunterJeff Altman, The Big Game Hunter is a coach who worked as a recruiter for what seems like one hundred years. His work involves career coaching, all as well as executive job search coaching, job coaching, and interview coaching. He is the host of “No BS Job Search Advice Radio,” the #1 podcast in iTunes for job search with more than 1800 episodes, and is a member of The Forbes Coaches Council.

Are you interested in 1:1 coaching, interview coaching, advice about networking more effectively, how to negotiate your offer or leadership coaching? Schedule a free Discovery call.

If you have a quick question for me, you can get it answered with a 3-5 minute video at https://www.wisio.com/TheBigGameHunter. Want to do it live?

JobSearchCoachingHQ.com offers great advice for job hunters—videos, my books and guides to job hunting, podcasts, articles, PLUS a community for you to ask questions of PLUS the ability to ask me questions where I function as your ally with no conflict of interest answering your questions.  

Jeff Altman, The Big Game Hunter
Jeff Altman, The Big Game Hunter

Connect with me on LinkedIn. Like me on Facebook.

Join and attend my classes on Skillshare. Become a premium member and get 2 months free.

Watch my videos on YouTube at JobSearchTV.com, the Job SearchTV app for FireTV, Roku or a firestick or BingeNetworks.tv for AppleTV and 90 smart tv platforms.

You can order a copy of “Diagnosing Your Job Search Problems” for Kindle on Amazon and receive free Kindle versions of “No BS Resume Advice” and “Interview Preparation.” If you are starting your search, order, “Get Ready for the Job Jungle.”

Would you like to talk through a salary negotiation or potential negotiation you’re involved with? Order and schedule time with me.

Do you have questions or would like advice about networking or any aspect of your search. Order and schedule time with me.

Would you like me to critique your resume? Order a critique from me

Jeff’s Kindle book, “You Can Fix Stupid: No BS Hiring Advice,” is available on Amazon.

 

About the author

Leave a Comment, Thought, Opinion. Speak like you're speaking with someone you love.