### Brain Teasers

# What are the Odds?

Trick
Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.Trick

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%

A) 25%

B) 50%

C) 60%

D) 25%

### Hint

What category is this question under?### 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!

Hide Hint Show Hint Hide Answer Show Answer

## What Next?

View a Similar Brain Teaser...

If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.

### Solve a Puzzle

## Comments

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.

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.

Nice one!! Of course me being me I said 25%. Aren't I amazing!!!

Awesome, cg!

I love your teasers! They're all very creative and and perfect in every way!

bwuuuuuuuuuuuh. I got it wrong and still don;t get it after reading the answer. That was extremely clever.

The correct answer is B.

The question is phrased "IF you choose to answer this question at random." 50%!

The question is phrased "IF you choose to answer this question at random." 50%!

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.

Thank you kitty.

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.

I thought that as well, Viper. 50%. Hmmm...

cool I think, lol

That's really smart

Thanks, my brain really hurts now. Great teaser.

I liked this one

this just scrambled my brain and served it with toast.Wheat toast.

I have no idea. Thi9s must be a young person's riddle.

Oops! #9 does not belong in there. It just snuck in when I was not looking.

Pretty easy, but enjoyed it.

The correct answer should be among the options for answering.

huh? need...more....coffee

I chose to not answer this question at random.

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'!

Isn't the odds of choosing A or D 33.333...% (one out of three) 25%, 50%, 60%?

I mean 33.333% choosing A or D and being correct...

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.

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.

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.

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%).

Wow...that's a great teaser! I love paradoxes

50% is the probability

On second thought, this belongs in the logic category.

Not really a simple trick, and as there was no specified question, I thought 0% possibility.

Should be in the LOGIC Category?

Should be in the LOGIC Category?

Random: A, B, C, or D. This a twisted version of Schrodinger's Cat. Being that the answer is random, the answer would be any of the four that is chosen. All are correct and all are not correct till A, B, C or D is randomly selected.

To post a comment, please create an account and sign in.

## Follow Braingle!