Brain Teasers
Odds Oddities
Fun: (2.1)
Difficulty: (1.31)
Puzzle ID: #18290
Submitted By: wizecracker55 Corrected By: Winner4600
Submitted By: wizecracker55 Corrected By: Winner4600
Probability
Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.Probability
You roll a die 24 times, and the results are as follows:
[1] 6 times
[2] 4 times
[3] 5 times
[4] 3 times
[5] 6 times
[6] 0 times
What are the odds of the twenty fifth die being a six?
[1] 6 times
[2] 4 times
[3] 5 times
[4] 3 times
[5] 6 times
[6] 0 times
What are the odds of the twenty fifth die being a six?
Answer
1:5(probability 1/6)
Dice have no memory, so previous rolls have no bearing on future rolls.
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Comments
What are the odds that it is a loaded die?
shouldn't this be trick?
As the comments show, there's no trick. It's just very elementary Mathematics.
Sorry..I meant you can tell from the ratings..!
How can you roll a 0 on a die?
Please do NOT misuse the word odds to mean probability. They are two different things. Look at the previous comment I made on another odds question to see why.
Odds are p/1-p. Thus, the odds are 1:5. (1/6)/(5/6) = 1/5 or 1:5 odds
Odds are p/1-p. Thus, the odds are 1:5. (1/6)/(5/6) = 1/5 or 1:5 odds
Poker, it's meant that the die never landed on 6.
What?
Dec 11, 2004
there is only six sides and not one of them has a zero or no dots on it so the sixth number is totally wrong the numbers can only go from 1-6 no other number is available!!!!
BlackCat - didn't you read rose_rox's comment? For clarification, the question means that out of the 24 rolls of the die, a [1] was rolled 6 times, a [2] was rolled 4 times, a [3] was rolled 5 times, a [4] was rolled 3 times, a [5] was rolled 6 times and a [6] was never rolled.
finaly one i got right HAHaha
The Zero is the number of times he rolled a 6 in the first 24 rolls, not a number on the dice
i didn't think hard enough
May 04, 2005
I....hate......math.....
jecrwin dear, trying to act smart aye? we all know it's 1:6 not 1:5 .LOL
Sssoooooo easy I'm 12 and I got it
Actually, jecrwin was right.
Since it's a ratio, the ODDS (not the same thing as probability) would be 5:1. However, the PROBABILITY (not the same thing as odds) would be 1/6.
It's kind of like saying, for every 5, there is then 1.... when altogether, there are 6.
Since it's a ratio, the ODDS (not the same thing as probability) would be 5:1. However, the PROBABILITY (not the same thing as odds) would be 1/6.
It's kind of like saying, for every 5, there is then 1.... when altogether, there are 6.
A more interesting question would be what are the odds that a 6 is rolled on the twenty-fifth roll given the previous 24 rolls? For each roll the chance that it ISN'T a 6 is 5/6, so the chance of no 6's rolled in 25 tries is 1-((5/6)^25)=.98952, or nearly a 99% chance that the 25th roll will be a 6.
Good one, thanks for teaser
The answer is incorrect. Odds are the comparison of favorable outcomes to unfavorable outcomes. There is one 6 and five are not 6. So the answer is 1:5.
This was WAY to easy. I don't see how all these people are having problems with it.
Super-easy. But fun.
If it's a fair die, then of course 1/6. However, a very lopsided run suggests it may not be. Baynesian probability can give you an adjusted figure on the basis of previous events but it's much too advanced for me to try to calculate.
There is another puzzle on the Braingle site, very similar, but with excess 5 and no 6, with the answer Zero, on the basis that the die has two 5s. Zero is of course an exaggeration as we are not sure of this analysis, it could be a random result.
There is another puzzle on the Braingle site, very similar, but with excess 5 and no 6, with the answer Zero, on the basis that the die has two 5s. Zero is of course an exaggeration as we are not sure of this analysis, it could be a random result.
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