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Posted (edited)

You have two switches: A and B. They can be on or off. They both start off.

The only rule is you can't switch the same switch twice.

You start by switching A on.

After 20 minutes your mom calls, and after the call you don't remember what you did last.

How will you know which switch to switch next?

Edited by QuantumT
Posted

Solution to those who don't want to bother solving it:

  Reveal hidden contents

 

Posted
  On 12/30/2018 at 7:00 PM, studiot said:

That only works if you specify more information at the beginning.

Expand  

You mean like this?

  On 12/29/2018 at 12:09 AM, QuantumT said:

You have two switches: A and B. They can be on or off. They both start off.

The only rule is you can't switch the same switch twice.

You start by switching A on.

Expand  

 

Posted
  On 12/30/2018 at 9:00 PM, QuantumT said:

I mean no disrespect, but I can't tell if you're being condescending, or if you missed the info at first glance?

Expand  

Oops you are right.

I didn't read it properly and missed the bit where you said both were off to begin with.

So the smiley was to say "yup that's one way to do it."

Let that be a lesson to those who are still condemned to take exams.

Read the Frigging Question.

My apologies. +1

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