### Brain Teasers

# What are the Odds?

Trick
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%

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!

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## 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.

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