What are the Odds?
Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.
If you choose to answer this question at random, what are the chances you will be correct?
A) 25%
B) 50%
C) 60%
D) 25%
HintWhat category is this question under?
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Answer
0%
If you were to choose 25%, that would be wrong, because there are two 25% answers, giving you a probability of 50%, which is also not possible, because the answer 50% is only offered once as an option. It's a probability paradox!
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Comments
kittycat
Nov 18, 2012
 First comment!
Great teaser, I got it simply because I read too many trick brain teasers.
I saw the name in the new teasers section and luckily glanced at the category before answering. I thought it was probability at first. 
ursulanq
Nov 20, 2012
 Nice one!! Of course me being me I said 25%. Aren't I amazing!!! 
dangerouspie101
Nov 23, 2012
 Awesome, cg! 
supernova12
Nov 24, 2012
 I love your teasers! They're all very creative and and perfect in every way! 
Quocalimar
Nov 24, 2012
 bwuuuuuuuuuuuh. I got it wrong and still don;t get it after reading the answer. That was extremely clever. 
Viper
Nov 25, 2012
 The correct answer is B.
The question is phrased "IF you choose to answer this question at random." 50%! 
kittycat
Nov 28, 2012
 But if the correct answer is B, then you DON'T have a 50% chance of getting it right. If the answer is 50%, then the answer is actually 25%, but then it would be 50, and it's an endless loop, a paradox. 
christiangrl
Nov 28, 2012
 Thank you kitty. 
Thekid4
Dec 05, 2012
 Okay, I see the paradox, but why is the answer 0%? Shouldn't it be "there is no answer" or "paradox"? Either way, great teaser. 
sarah12lizbeth
Dec 08, 2012
 I thought that as well, Viper. 50%. Hmmm... 
Obilio
Dec 11, 2012
 cool I think, lol 
sashomarine
Mar 22, 2013
 That's really smart 
JQPublic
Apr 19, 2013
 Thanks, my brain really hurts now. Great teaser. 
SaraGrace
Jul 31, 2013
 I liked this one 
kitykity1t
Aug 06, 2013
 this just scrambled my brain and served it with toast.Wheat toast. 
Babe
Jan 06, 2014
 I have no idea. Thi9s must be a young person's riddle.

Babe
Jan 06, 2014
 Oops! #9 does not belong in there. It just snuck in when I was not looking. 
HABS2933
Jan 06, 2014
 Pretty easy, but enjoyed it. 
FarFetched
Jan 06, 2014
 The correct answer should be among the options for answering. 
catmom
Jan 06, 2014
 huh? need...more....coffee 
dsjt
Jan 06, 2014
 I chose to not answer this question at random. 
jandjfrench
Jan 06, 2014
 It seems that if I choose to answer the question at random and do answer the odds that I've correctly answered are 100% (sure thing). Just sayin'! 
Zykezex
Jan 06, 2014
 Isn't the odds of choosing A or D 33.333...% (one out of three) 25%, 50%, 60%? 
Zykezex
Jan 06, 2014
 I mean 33.333% choosing A or D and being correct... 
spikethru4
Jan 07, 2014
 Zykezex: The probability of picking A or D is 2 out of 4, not 1 out of 3. Don't forget that "25%" is twice as likely as the other two options because it appears twice.
FarFetched: That's the trick. If the "correct answer" were an option, you'd still get a paradox, e.g.
What are the chances of picking the correct answer?
A) 25%
B) 50%
C) 60%
D) 25%
E) 0%
...but clearly you can pick E 20% of the time so it's no longer correct. 
Zykezex
Jan 07, 2014
 A thought: If I couldn't see the answers, A&D are 2/4. Having seen 25% twice, my choices narrowed to 1/3. (25%, 50% or 60%). The chances of being correct are still zero as 33.333% wasn't an answer for A or D. 
spikethru4
Jan 09, 2014
 That's a fair comment, but the point is you're answering at random, so the choices are (A, B, C, D), not (25%, 50%, 60%). 
ultimatecub
Nov 30, 2014
 Wow...that's a great teaser! I love paradoxes 
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