### Brain Teasers

# Odds Oddities

Fun: (2.1)
Difficulty: (1.33)
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.

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.

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