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I saw this on Facebook and how it divided people. And i like to see everyone freak out over math problems here.
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I saw this on Facebook and how it divided people. And i like to see everyone freak out over math problems here.
It's 9 or 1. All depends on whether your 6/2 is a fraction before the bracket, or whether it's 6 divided by 2(2+1)
Unless it is specified that it is 6 all over 2(1+2) I think we are safe to assume the answer is 9.
I saw it on facebook and instantly accepted that 100% of the people who said 1 were idiots. Perhaps a bit harsh, in hindsight.
EDIT: I asked my nerdy maths friend that other infamous maths question we have around here. However that was almost immediately preceding me smashing my face into the ground so I don't remember her answer. I assume it was infuriating? :confused:
The way the problem is written is stupid. If written correctly, it should appear 6/2 * (2 + 1) to make it clear. The way it is written 6/2(2+1) almost makes it seem as if it should be
6
-----
2(2+1)
It's easy to understand those idiots.
It's 9, because 6/2 is a coefficient of (1+2), in the same way it would be if the equation read 6(1+2)/2. You have to treat the brackets as a single term, BEDMAS or otherwise.
6 / 2(1 + 2) = 6 / 2 * (1 + 2)
= 6 / 2 * (3)
= 3 * 3
= 9
To get an answer of one is to treat both 2s as part of the brackets.
So ner. :p
To be fair, the way it is written on Facebook it uses the divided by sign that is, to my knowledge, impossible to make on the keyboard.
http://upload.wikimedia.org/wikipedi...on_Sign(a).png instead of 6/2(1+2).
It's 9, nothing to see here, move along people.
9
PEMDAS is always done left to right. Q.E.D.
To be one is would have to be written as 6/(2(1+2)) :p
No math class that actually matters would ask that question. Any division that can be misunderstood should be done as a fraction. Period.
Ya basically. The division sign is too ambiguous. And if 6/2 is the coefficient why isn't it (6/2)? [I really don't know, I'm bad at math and I'm asking. :p]Quote:
Originally Posted by Goldenboko
But I have a ?.
Wouldn't 2(1+2) be the same as (2+4)? All I did was put the 2 into the parentheses. Unless of course 6/2 really is the coefficient. So then it could be solved when re written ((6/2)+(12/2)) :p Screw your PEDMAS
It is was just 2(1+2), then yes it would be the same as (2+4) but the (1+2) is multiplied by the 6/2 so in the end it would be (3+6), which is 9.
Also, BEDMAS > PEMDAS.
I think the whole point of these stupid smurfing questions is that it's arguable which one is "correct".
I've been seeing this for a week and it's pissing me off.
Quote:
Originally Posted by Bunny
÷ Is Alt and 246 on the numberpad for windows. :p
PEMDAS works because you must go from right to left. The Distributive Property is just a form of Multiplication, and you always go from left to right. In this example 6/2 is the coefficient. But before applying the distributive property it's best to see if you can combine like terms first, as well as simplify. You are just using a more roundabout way to simplify. :p It's like going at 2+2 by saying that it's really 2 + bi - (-2 + bi) where b is any real number. Making the problem more complicated than it really needs to be.Quote:
Originally Posted by JustyYa basically. The division sign is too ambiguous. And if 6/2 is the coefficient why isn't it (6/2)? [I really don't know, I'm bad at math and I'm asking. :p]Quote:
Originally Posted by Goldenboko
But I have a ?.
Wouldn't 2(1+2) be the same as (2+4)? All I did was put the 2 into the parentheses. Unless of course 6/2 really is the coefficient. So then it could be solved when re written ((6/2)+(12/2)) :p Screw your PEDMAS
You could say it's really 6(0.5 + 1) Note: I distributed the 1/2 and wrote all fractions as decimals. :p
What it all boils down to is division is really a form of multiplication, just like all subtraction is a form of addition. Also the fact that Arithmetic is very very easy. :p
Edit:
Parentheses are a type of Brackets. Also Please Excuse My dear Aunt Sally, :bigsmile:Quote:
Originally Posted by The Summoner of Leviathan
Quote:
Originally Posted by NorthernChaosGod
9 is the only correct answer. (assuming base 9 or higher of course :p)
I read something a couple of weeks ago (which I wish I could find again) where a number of people in academia are stating that multiplying a bracket to another number has priority over everything else. Which leads to the ridiculous conclusion that 2(1+2) is different from 2 * (1+2), despite the fact that no one has written like that in the history of ever. The article also conceded that all calculators and computer programs work differently.
It is 9.
I actually read something like this when I was arguing with my friend over these questions. Multiple sources state different things.Quote:
Originally Posted by Raistlin
We also found this one out when our calculators came up with different answers.Quote:
Originally Posted by Raistlin
Foiled again.Quote:
Originally Posted by qwertysaurQuote:
Originally Posted by Bunny
÷ Is Alt and 246 on the numberpad for windows. :p=
I find it laughable that you felt a need to use a calculator on this. :p People are making this far more complicated than it is. For some reason people see math and think it must all be Multivariable Calulus or something.
Around the 6/2 there is an invisible set of parentheses. It comes with the fact that it is a fraction.
Look at the problem written using the ÷ symbol, rewriting it as 6÷2(1+2). Now lets not follow proper PEMDAS to solve it. (You would first add the 1+2, then divide the 6÷2, then multiply the resulting 3*3) If you feel incomplete without them you can still write it as (6÷2)(1+2)
We can distribute the 2. But when we use the distributive property we must also distribute the sign. Usually this is where people make a mistake because they forget to do this because situation where you need to do this are very rare and usually avoidable. So 6÷2(1+2) becomes 6÷1 + 6÷2. From here we get to 6 + 3 (To Divide before Adding is an undisputed rule :p) which is 9.
If you're talking to me, my friend pulled his out for "proof" and then I went to make sure he didn't smurf with the input to get his desired answer.Quote:
Originally Posted by qwertysaur
Where all this is true, application of PEMDAS is a menial task that when doing things like triple integrals, I don't have time to give a smurf about. Which is why I liek me them fractions.Quote:
Originally Posted by qwertysaurPEMDAS works because you must go from right to left. The Distributive Property is just a form of Multiplication, and you always go from left to right. In this example 6/2 is the coefficient. But before applying the distributive property it's best to see if you can combine like terms first, as well as simplify. You are just using a more roundabout way to simplify. :p It's like going at 2+2 by saying that it's really 2 + bi - (-2 + bi) where b is any real number. Making the problem more complicated than it really needs to be.Quote:
Originally Posted by JustyYa basically. The division sign is too ambiguous. And if 6/2 is the coefficient why isn't it (6/2)? [I really don't know, I'm bad at math and I'm asking. :p]Quote:
Originally Posted by Goldenboko
But I have a ?.
Wouldn't 2(1+2) be the same as (2+4)? All I did was put the 2 into the parentheses. Unless of course 6/2 really is the coefficient. So then it could be solved when re written ((6/2)+(12/2)) :p Screw your PEDMAS
You could say it's really 6(0.5 + 1) Note: I distributed the 1/2 and wrote all fractions as decimals. :p
What it all boils down to is division is really a form of multiplication, just like all subtraction is a form of addition. Also the fact that Arithmetic is very very easy. :p
Quote:
Originally Posted by GoldenbokoWhere all this is true, application of PEMDAS is a menial task that when doing things like triple integrals, I don't have time to give a smurf about. Which is why I liek me them fractions.Quote:
Originally Posted by qwertysaurPEMDAS works because you must go from right to left. The Distributive Property is just a form of Multiplication, and you always go from left to right. In this example 6/2 is the coefficient. But before applying the distributive property it's best to see if you can combine like terms first, as well as simplify. You are just using a more roundabout way to simplify. :p It's like going at 2+2 by saying that it's really 2 + bi - (-2 + bi) where b is any real number. Making the problem more complicated than it really needs to be.Quote:
Originally Posted by JustyYa basically. The division sign is too ambiguous. And if 6/2 is the coefficient why isn't it (6/2)? [I really don't know, I'm bad at math and I'm asking. :p]Quote:
Originally Posted by Goldenboko
But I have a ?.
Wouldn't 2(1+2) be the same as (2+4)? All I did was put the 2 into the parentheses. Unless of course 6/2 really is the coefficient. So then it could be solved when re written ((6/2)+(12/2)) :p Screw your PEDMAS
You could say it's really 6(0.5 + 1) Note: I distributed the 1/2 and wrote all fractions as decimals. :p
What it all boils down to is division is really a form of multiplication, just like all subtraction is a form of addition. Also the fact that Arithmetic is very very easy. :p
You say that like Triple Integrals are difficult. :p
Also I don't think about PEMDAS either. I don't think about breathing or how to walk either. :p
Unfortunately I slept through Algebra One.
I saw this math problem come up a few days ago and it left me a little unsettled as I cannot recall being taught that order of operations has different levels that need to be done on a left to right basis. Instead, I recall the order of operations being an absolute order that needed to be adhered to at all times.Quote:
Originally Posted by qwertysaur
I learned about the left to right logic and figured that it was an easy math problem that was written in a slightly ambiguous way to make people more conscious of this issue, probably.
The one she saw on Facebook was 6÷2(1+2). No potential fraction, less confusing. No real excuse for people to be answering 1.
My cousin got in an argument with some girl about this yesterday. I said he was right and she implied I was either a liar or stupid (I said I was a math teacher and she said "I can claim math teacher" and "I've had a lot of stupid teachers"), and then called us rude when she figured out she really was wrong. And then she deleted all of her comments before I had a chance to screencap them for Failbook. Damn.
Anyway, it's 9.
To anyone that's unclear, multiplication/division and addition/subtraction are inverse operations, and therefore the order of them is interchangable. PEDMSA is just as valid as PEMDAS.
So you do what's in the parenthesis, which simplifies the problem to 6÷2(3). The 2(3) is multiplication. It's expressed with a parenthesis, but it is still just multiplication.
That said, you do the remainder of the problem left-to-right: six, divided by two, and then times three.
This is fifth grade math. Maybe fourth.Quote:
Originally Posted by Goldenboko
[q]xD yes Pikachu but I do it like the first example. but you do parenthesis first
6 / 2(3) = 3(3) = 9
6/2(3) = 6/6 = 1[/q]
So I am right. the answer is 9
9.
The answer is 7. Duh
1. nuff said
My australian school taught me BOMDAS and I just like saying it. BOMDAS. :bou::bou::bou::bou: yeah bitches.
I tried to work it out and ended up with 6÷2(1+2)= foa. WHAT DOES IT MEAN
Sorry guys I gotta say 1. It's the way my calculator thinks and it's the way I think. If it were 6:2 * (2+1) on the otherhand I'd say 9.
Because if the question was
6:2a
where a = 2 + 1
I would take that as 6/(2a) rather than (6/2)a
Now that i think about it
I DONT KNOW
Maybe its confusing to me because 2(2+1) looks like a function called 2 with input parameter 2 + 1
In fact screw it nothing says this is a math question and not a computer science question, for all i know it's terribly written pseudocode where someone decided to use 2 as a function name
So there is no answer unless someone gives me the subroutine for 2(float x) and if the subroutine for 2 was
return (x*2);
then my answer would be 1.
Math is badass. foa is badass. So math is foa?Quote:
Originally Posted by Azar
What does the O signify Jiro? Over?
Brackets Of Multiplication Division Addition Subtraction
You're still in high school. DO MATH RIGHT.Quote:
Originally Posted by Hypoallergenic Cactuar
It's 9. In case of: x / y * z, where you have equal importance, you go from left to right.
It can be Over or Of, I think Of makes more sense because (Powers) Of y'know?
I just saw one of my friends make his status the equation. One girl got on there and was all "It's 1, everyone who says 9 has a common mind. This isn't an insult, I was one too once, but now I have made the changes and I'm not a common mind any more."
What a bitch :hahaha: She then used an equation she dreamed up to prove why her version of following BOMDAS/PEMDAS etc was superior and smurfed that one up hardcore.
Moral of the story is: Don't act like a high and mighty superior bastard and your fall from grace won't be as spectacular.
Calculus BC thank you very muchQuote:
Originally Posted by ShlupQuackYou're still in high school. DO MATH RIGHT.Quote:
Originally Posted by Hypoallergenic Cactuar
How are you with Taylor Series? And I hope you mastered finding the volume of an object from a rotation of a function. Those topics are favorites to add to the exam. Also Parametric equations though those are really easy. And I hope you memorized all the inverse trig derivatives. You will need to use them. They make the questions based on BC exclusive content harder just because they can.Quote:
Originally Posted by Hypoallergenic CactuarCalculus BC thank you very muchQuote:
Originally Posted by ShlupQuackYou're still in high school. DO MATH RIGHT.Quote:
Originally Posted by Hypoallergenic Cactuar
And remember, you get no calculator for the multiple choice questions, and they expect you to be able to do something this simple without a thought.
On my Calc BC exam they asked for a 6th degree Taylor series as the final free response question. BC Calc was so much fun.
So I really don't know if anyone has answered my question yet of if six halves is the coefficient then why isn't it written as (6/2)(1+2)?
I'm a language major who is currently failing math. I am only asking questions! I just want answers. Why can't I have answers D:
No one's answered your question because it doesn't make sense.
If you're in calc then you should probably do fifth grade math right.Quote:
Originally Posted by Hypoallergenic CactuarCalculus BC thank you very muchQuote:
Originally Posted by ShlupQuackYou're still in high school. DO MATH RIGHT.Quote:
Originally Posted by Hypoallergenic Cactuar
Why not? If I divide 6 by 2 before I add the 1 and 2 in the parenthesis, I still get the same result.Quote:
Originally Posted by ShlupQuack
Because that's not the equation we're discussing. The actual equation is now in the title with less misleading notation. The 2 is multiplied by what's in the brackets, not 6/2 as a whole. Which is the whole source of this stupid debate.
I answered it here
http://forums.eyesonff.com/general-c...ml#post2977837
Man, this is like a stupid soda v. pop debate. :colbert:
When in doubt, use Wolfram Alpha.
No, it's not, because it has a right answer: 9. This is pretty basic smurfing math; there is no debate.Quote:
Originally Posted by NorthernChaosGod
I can see a couple of people maybe being a little confused because rubah originally posted the equation slightly different from the original one, but the answer would still be 9. Plug it into Google if it makes you feel better; the answer is smurfing 9.
Quote:
Originally Posted by Aerith's Knight
It's very polite. :bigsmile:
So in that sense it really is like the soda vs pop "debate."Quote:
Originally Posted by ShlupQuackNo, it's not, because it has a right answer: 9. This is pretty basic smurfing math; there is no debate.Quote:
Originally Posted by NorthernChaosGod
I was waiting for someone to say that, but I have to say that I'm a little disappointed that it was you.
Yes, only it's more painful to see people try and defend the incorrect answer. This is a 3rd grade level problem in NY.Quote:
Originally Posted by RaistlinSo in that sense it really is like the soda vs pop "debate."Quote:
Originally Posted by ShlupQuackNo, it's not, because it has a right answer: 9. This is pretty basic smurfing math; there is no debate.Quote:
Originally Posted by NorthernChaosGod
Yeah, I shouldn't've tried to read the comments on the original Facebook poll. So many of the people who answered 1 just say something like "its PEMDAS u dum bitchez".Quote:
Originally Posted by qwertysaur
I have been subjected to more stupidity in the last couple of days that I can handle. BJ's about to come home to a drunkass of a wife.
I always knew the O as "orders".... but imo BEDMAS (brackets, exponents, div, mul, add, sub) is the best. For no reason other than I learnt it as a kid. :DQuote:
Originally Posted by Jiro
The first pair of brackets aid the clarity of the equation but isn't technically necessary, thanks to BEDMAS. A coefficient is any number multiplied by another, and this equation is in the form of a/b*c; since division is actually a type of multiplication (a/b = a*(1/b) = a * b-1), the true form of the equation is actually a*b*c. Therefore:Quote:
Originally Posted by Justy
- a*b*c = 6*1/2*(1+2)
- 6/2 is a coefficient of (1+2)
- (1/2)(1+2) is a coefficient of 6
- 6(1+2) is a coefficient of 1/2 (or 2-1)
In any case, the brackets must be done first:
6/2(1+2) = 6/2(3)
Another way to write 2(3) is 2*3:
6/2(3) = 6/2*3
Therefore, by BEDMAS, you multiply and divide from left to right:
6/2*3 = 3*3 = 9
:D
Meh, slept then too.Quote:
Originally Posted by ShlupQuackThis is fifth grade math. Maybe fourth.Quote:
Originally Posted by Goldenboko
Quote:
Originally Posted by GoldenbokoMeh, slept then too.Quote:
Originally Posted by ShlupQuackThis is fifth grade math. Maybe fourth.Quote:
Originally Posted by Goldenboko
It should still be second nature though. I slept through Pre Calculus in High school occasionally because it was so easy. :p
Same here in my English schools. And for us, the O was either Of or Order I think? I kinda stopped paying attention to it after Year 9 and did it all automatically anyway.Quote:
Originally Posted by Jiro
Thank you for understanding what I was asking and explaining it. :heart:Quote:
Originally Posted by õ_ÔThe first pair of brackets aid the clarity of the equation but isn't technically necessary, thanks to BEDMAS. A coefficient is any number multiplied by another, and this equation is in the form of a/b*c; since division is actually a type of multiplication (a/b = a*(1/b) = a * b-1), the true form of the equation is actually a*b*c. Therefore:Quote:
Originally Posted by Justy
- a*b*c = 6*1/2*(1+2)
- 6/2 is a coefficient of (1+2)
- (1/2)(1+2) is a coefficient of 6
- 6(1+2) is a coefficient of 1/2 (or 2-1)
In any case, the brackets must be done first:
6/2(1+2) = 6/2(3)
Another way to write 2(3) is 2*3:
6/2(3) = 6/2*3
Therefore, by BEDMAS, you multiply and divide from left to right:
6/2*3 = 3*3 = 9
:D
I don't mind that it's you who explained it for me. :love:Quote:
Originally Posted by RaistlinSo in that sense it really is like the soda vs pop "debate."Quote:
Originally Posted by ShlupQuackNo, it's not, because it has a right answer: 9. This is pretty basic smurfing math; there is no debate.Quote:
Originally Posted by NorthernChaosGod
Sixth grade math was fractions FYIQuote:
Originally Posted by ShlupQuack
This is fifth grade math. Maybe fourth.Quote:
Originally Posted by Goldenboko
I would've said 1 but it's a moot point because as an engineer, I would be typing it into a computer or calculator anyway. (We never learned the PE part, just My Dear Aunt Sally, with no implicit direction. So, uh, it's great that you guys have such stellar math departments in your elementary schools!)
Thank you for explaining math education to me, for it is clearly something I have no knowledge of. xDQuote:
Originally Posted by rubahSixth grade math was fractions FYIQuote:
Originally Posted by ShlupQuack
This is fifth grade math. Maybe fourth.Quote:
Originally Posted by Goldenboko
Though it also depends on where you live, when you went to elementary school, and what properties of fractions you're talking about.
I had to look up the order of operations to determine the answer. In my defence it's been like nine years since I had a maths class. I got a 5 on the BC Calc exam in 10th grade so it's not like the subject of maths was ever difficult for me, but I haven't had anything for which I needed to use order of operations in ages. Or differentials.
Incidentally whoever started this doing the rounds must have copied it from the Wikipedia article on order of operations because it appears as an example in the article.
Just making sure you don't take your experiences for norms~Quote:
Originally Posted by ShlupQuack
everyone being all "if you think this then you're retarded" up in this thread is kinda pissing me off since it's effectively a nonissue, as gobo has demonstrated.
the basic gist is you're all falling subject to what amounts to a peegee troll
I resent that. I didn't say 1 I said 9.
link
another way to show the solution:
6/2(1+2) = x
you get a '1' if you distribute 2(1+2)
there's no other way to get a 1
6/2(1+2) = 6/(2+4) = 6/6 = 1
6/2(1+2) = 6/(2*3) = 6/6 = 1
but those brackets don't exist when you distribute. They disappear
6/2(1+2) = 6/2*3
6/2 = 3
3*3 = 9
QED
alternatively: 6/2*3 = (3* 6 ) / 2 not 6 / (2*3)
you can only move the multiplication symbol around in an equation, but not the division sign
3*5 = 5*3
3/5 != 5/3
edit again:
I've re-written the exact same question in a way that anybody can solve
http://i51.:bou::bou::bou::bou::bou:...u:/2j3l9uc.jpg
I see your handwriting has improved!
Yep it stands for Orders, as in Powers/Exponents/Indices etc.Quote:
Originally Posted by õ_ÔI always knew the O as "orders".... but imo BEDMAS (brackets, exponents, div, mul, add, sub) is the best. For no reason other than I learnt it as a kid. :DQuote:
Originally Posted by Jiro
I think primary schools need to make the fact that you do things left to right a little clearer. Though with some people, it'll always be a lost cause...