JODHA AKBAR FUN CLUB - BRAIN TEASERS & PUZZLES !!! - Page 9

Originally posted by: harrybird

Weekend Puzzle # 4

100 prisoners are stuck in the prison in solitary cells facing sentence till death. The warden of the prison got bored one day and offered them a challenge.

He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once".

If that happens to be true, all the prisoners will be set free.

If it is false, then all the prisoners will be executed.

The prisoners are given some time to discuss and figure out a solution.

After a long discussion, the prisoners accepted the challenge .

How do they ensure they all go free?

Note : No provision for marking on the wall !

Originally posted by: devkidmd

Hi Dev !

How are they going to discuss if they are in solitary cells? Or does the warden let them have a little meeting?😲

Yep ! Check the lines highlighted in blue...

They might just decide to kaam tamaam karofy the warden.😕😕

Good Idea But, they will be executed immediately for killing the warden ! 😆

Since this is the only way they will EVER get out of that prison, they accepted the challenge !

Devki

Originally posted by: harrybird

Deeps score - 10 out of 5 !

😲 😲 😲

Reaction to Deeps score !

Deeps, Tussi Great Ho ! 😆 😆 😆

Originally posted by: harrybird

PS : Ooh ! I forgot to say...Welcome Dear ! 😃

Originally posted by: harrybird

Weekend Puzzle # 4

100 prisoners are stuck in the prison in solitary cells facing sentence till death. The warden of the prison got bored one day and offered them a challenge.

He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once".

If that happens to be true, all the prisoners will be set free.

If it is false, then all the prisoners will be executed.

The prisoners are given some time to discuss and figure out a solution.

After a long discussion, the prisoners accepted the challenge .

How do they ensure they all go free?

Note : No provision for marking on the wall !

Originally posted by: Sandhya.A

One prisoner keeps check.

When each prisoner visits the cell,

If the bulb is on, he does nothing. Just leaves it on.

If the bulb is off, he switches it on JUST ONCE. If he visits the cell subsequently he leaves it off.

The checking prisoner will switch the light off it it is on. Else he does nothing.

When he has switched it off 99 times he will know that they have all visited atleast once.

But God knows how long it will take as the checking prisoner has to be selected once after every other prisoner. Since they are randomly selected, this may go on and on for years.

Hope i make some sense. This was the closest i could think of.😕

But i prefer Devki's method of kaam tamaaming the warden.😆