## Welcome to BrainDen.com - Brain Teasers Forum

 Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account. As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends. Of course, you can also enjoy our collection of amazing optical illusions and cool math games. If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top. If you have a website, we would appreciate a little link to BrainDen. Thanks and enjoy the Den :-)
Guest Message by DevFuse

# Russian roulette on steroids

5 replies to this topic

### #1 bonanova

bonanova

bonanova

• Moderator
• 5244 posts
• Gender:Male
• Location:New York

Posted 06 November 2007 - 10:13 AM

Russian roulette normally has a single bullet in one of 6 chambers.
The barrel is spun and players take turns pulling the trigger, passing the gun to the other player should they survive.
The game stops when one player dies.

Russian roulette on steroids has bullets in 3 consecutive chambers.
The barrel is spun only once.

You have the choice of being the first or second to shoot.
Which do you choose?

Spoiler for solution

• 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

### #2 hipowertech

hipowertech

Junior Member

• Members
• 65 posts

Posted 06 November 2007 - 03:57 PM

Second,
50/50 chance the other guy gets it and ends the game. 100% survival in that case.
If he hits a blank you have a better than 50/50 chance of hitting another. I dont have time before work to do the math on this one but it seems logical with three consecutive blank chambers and three consecutive full chambers. Once you hit a blank you can eliminate #2 and #3 bullets being next. You can also eliminate the chamber the other guy just used. So I guess you would by process of elimination have a 2/3 chance of another blank.

Just my 158gr worth.

Peace
• 0

### #3 cpotting

cpotting

• Members
• 110 posts

Posted 06 November 2007 - 08:19 PM

You want to be second, for two reasons:

Spoiler for solution

Spoiler for solution

• 0

### #4 bonanova

bonanova

bonanova

• Moderator
• 5244 posts
• Gender:Male
• Location:New York

Posted 06 November 2007 - 09:01 PM

You want to be second, for two reasons:

Spoiler for solution

Spoiler for solution

• 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

### #5 cpotting

cpotting

• Members
• 110 posts

Posted 06 November 2007 - 09:19 PM

It's 2/3 not 70% cuz player 1 surviving the first shot skews the likelihood of the other outcomes a little bit.

I didn't pay attention to the stated rules, and reverted to regular roulette (steroid-free). I also did not continue on after both players survive their first turns. My mistake - I was doing this while at work (shhhh!)

Did Russians have so little to do that this seemed like a sport?

No, it was a cleverly disguised form of eugenics designed to weed out those prone to gambling and the extremely gullible.
• 0

### #6 hipowertech

hipowertech

Junior Member

• Members
• 65 posts

Posted 20 November 2007 - 09:50 PM

Well Bonanova,

I realized recently that I never finished out the math, simple as it is, after the second pull of the trigger. See previous post to see where I am at this point.
player one survived first round.
player two survived first round.
we now know that 2 out of 3 empty chambers are no longer an option. (outta the equation.)
we also know that the second and third full chambers can't precede the first. (outta here)
player one on his second turn once again has a 50/50 chance of survival as there are only two chambers that could be next, one full, one empty.

option #1. If he hits the full chamber we know the game is over and player two wins (might need some new clothes though.)
option #2. If he hits the empty chamber by process of elimination we know that full chamber #1 HAS to be next. The weapon is handed to player #2 and he has three full chambers with which to fight his way out of the room.

in any scenario it seems best to be player #2 as foolish as the game may seem.

Gun control = maintaining your grip

Peace
• 0

#### 0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users