What are the chances of solving this problem.

41% isn't an option....
This site makes me hate math.

What are the chances that the people that came up with that website don't understand Mathematics?

There seems to be a NodeBB bug, I'm TL3 and can't move this to Sidebar WTF where it belongs.

Actually it's correct. Despite the fact that we write it 100%, the actual value is 1.0. And...
sqrt(1) == 1

@CoyneTheDup If the question were
sqrt(100%) = ?
, then yes it's correct.But look at the top.
What are the chances of solving this problem?
[image]
sqrt(100%)Seriously?
Like, chances as a society? That's 100%, because we solved it.
Chances that any individual? Not enough information.
Chances that any individual that's visited the site and attempted the problem at this site? 41%.So the correct answer, is
Insufficient Information

@xaade said in What are the chances of solving this problem.:
@CoyneTheDup If the question were
sqrt(100%) = ?
, then yes it's correct.But look at the top.
What are the chances of solving this problem?
[image]
sqrt(100%)Seriously?
Chances that any individual that's visited the site and attempted the problem at this site? 41%.
So the correct answer, is
Insufficient Information
Oh. Okay, I accept a .

I had a teacher that would pull this kind of bullshit:
What is the fourth word of this sentence:
When it is midnight in New York, what time is it in Los Angeles?A) 9 PM
B) midnight
C) 3 AMMost people wouldn't read the question at the top and just answer the question at the bottom.

@NedFodder Of course the real answer is
false
because "what" isn't the fourth word of that sentence.

@xaade Is the image somehow relevant? Or is the problem just the square root of 1?

@NedFodder Wouldn't the answer be "fourth"

@xaade said in What are the chances of solving this problem.:
Wouldn't the answer be "fourth"
No, because there’s a colon at the end of “What is the fourth word of this sentence:” and that means the word “this” in it refers to what comes after the colon. Had there been any other punctuation instead, you’d be correct.

@Gurth @xaade This was in junior high school, over 25 years ago FFS! I don't remember the exact punctuation or even the real question.

@xaade ...not sure I get what the issue is here.
sqrt(100%)
is 100%. Is the issue that only 41% of people got it correct? Because I can definitely see how a lot of people would've thought it was 10%.@xaade said in What are the chances of solving this problem.:
But look at the top.
What are the chances of solving this problem?
...ohhhhhhhhhh. You're reading it as one of those bullshit trick questions. Well, it's not. It's just a math problem. And the question at the top was speculating that a lot of people will get it wrong. It was a rhetorical question; that means you aren't supposed to answer it.

Can't the result of a square root be +/? So 100% is an answer, but it's not the answer.
Insufficient Information
could also be valid.PS  yes, i got the joke.

This is why bullshit questions are bullshit.
The number of interpretations make the questions ambiguous.

@Bort said in What are the chances of solving this problem.:
Can't the result of a square root be +/? So 100% is an answer, but it's not the answer.
Insufficient Information
could also be valid.PS  yes, i got the joke.
I think probability cannot be negative?

@Bort said in What are the chances of solving this problem.:
Can't the result of a square root be +/? So 100% is an answer, but it's not the answer.
Insufficient Information
could also be valid.PS  yes, i got the joke.
...percents are always positive. I mean, what would it even mean if you had 10% of something?

@powerlord said in What are the chances of solving this problem.:
...percents are always positive. I mean, what would it even mean if you had 10% of something?
What would it mean if you had negative dollars? If you can grasp that concept, it should be fairly easy to understand negative percentages...

@powerlord said in What are the chances of solving this problem.:
...percents are always positive.
No. If you're talking about the percentage increase of some quantity yet the value actually decreased, a negative percentage is entirely cromulent.

@xaade said in What are the chances of solving this problem.:
The number of interpretations make the questions ambiguous.
And that’s why fun for all can be had with them!

@powerlord said in What are the chances of solving this problem.:
...percents are always positive. I mean, what would it even mean if you had 10% of something?
That you owed someone 10% of what would be that something.

@dkf Since when did the phrase 'entirely cromulent' emerge, I thought it was always 'perfectly cromulent' around here?

@powerlord said in What are the chances of solving this problem.:
@Bort said in What are the chances of solving this problem.:
Can't the result of a square root be +/? So 100% is an answer, but it's not the answer.
Insufficient Information
could also be valid.PS  yes, i got the joke.
...percents are always positive. I mean, what would it even mean if you had 10% of something?
I'm not sure what the application would be, but the math makes sense: $100 x 10% = $10.
Let's see, "This item is 20% off," means you pay 20% more. ($100  $100 x .2)
"Your bank account earns an APR of 0.3%," would be a bank fee, but a mortgate "at 0.3% APR" would be a good thing (let that sucker partpay itself off). A credit card at "APR of 30%" I would max out immediately.
Stupid applications only, I guess.

@CoyneTheDup said in What are the chances of solving this problem.:
I'm not sure what the application would be,
Revenue for 201503 = 120,516
Revenue for 201603 = 112,103
This yr vs last : (8,413) = (6.98) %

@Arantor said in What are the chances of solving this problem.:
@dkf Since when did the phrase 'entirely cromulent' emerge, I thought it was always 'perfectly cromulent' around here?
"Entirely" is a perfectly cromulant modifier for cromulent.

You extended the cromulant class?

@CoyneTheDup
The European Central Bank has had a negative interest rate for a couple of years now.
They want to make people spend more money by making it cheaper to take out a loan and more expensive to keep money in a bank.

@julmu said in What are the chances of solving this problem.:
a negative interest rate
as in "you'd make more money by keeping the cash in your mattress"? That's pretty dumb for a bank.

@CoyneTheDup "off" already implies a negative. "20% off" means 20%. So there's your practical application.
If you make it into a double negative, though, then it makes about as much sense as any other double negative.

@ben_lubar said in What are the chances of solving this problem.:
That's pretty dumb for a bank.
It's governments trying to get you to spend your money instead of saving it.

@julmu Apparently, in the past certain Dutch banks have sold mortgages at the interbankary interest rate, plus 0.7 percent, and even that went negative. And the judge ruled that yes, this does mean the bank has to pay those people money.

@Bort said in What are the chances of solving this problem.:
Can't the result of a square root be +/? So 100% is an answer, but it's not the answer.
No. By definition, the square root is positive. The answer to x² = a (for a > 0) is x = ±√a, but √a itself is positive.
Things are different when you're working in the complex numbers (which can't usefully be divided into positive, negative, and zero) but that is not the domain in question.

@Scarlet_Manuka said in What are the chances of solving this problem.:
The answer to x² = a (for a > 0) is x = ±√a, but √a itself is positive.
In that case, you can't actually tell. Flipping the sign would result in exactly the same equation being true. Using the positive root is just convention, nothing more.

@dkf Mathematics rely on a lot of conventions. One of them is that √a is the principal (nonnegative) square root of a (for any real nonnegative a).
@Scarlet_Manuka The field of complex numbers is algebraically closed, so any polynomial over it can be factored into a product of 1stdegree polynomials (so it has a number of roots equal to its degree, if you account for root multiplicity). So x² = a has 2 solutions for any complex a (if a = 0, the root is a double one).

@Khudzlin Strictly, all quadratic equations have two roots though the roots might be coincident and might only be in the complex plain and not on the real number line. This generalises.

@dkf Like I said, it generalises to all polynomials with complex coefficients (which does include all polynomials with real coefficients, since real numbers are a subset of complex numbers). But polynomials with real coefficients do not always have a number of real roots equal to their degree, since polynomials of the form x² + a where a > 0 are not factorable over the reals.

@dkf said in What are the chances of solving this problem.:
you can't actually tell. Flipping the sign would result in exactly the same equation being true. Using the positive root is just convention, nothing more.
No, it's part of the definition of the function denoted by √x. I suppose it's convention that the notation √x denotes the function it does, instead of a where a^{2}=x, but if you're going to insist on that then it's only convention that it refers to either of those and not 47x  ln(x+3), or something.