/sci/ - Science & Math

[Anonymous No.4760512]

Prove your national identity with your answer

Disregard the facebook reference

[Anonymous No.4760514]

Americans will say 1
Europeans will say 9

[Anonymous No.4760522]

<span class="math">6\div2(1+2)=288[/spoiler]

[Anonymous No.4760523]

START = 6/2(1+2)
RESOLVE (1+2) = 6/2(3)
RESOLVE 6/2 = 3(3)
RESOLVE 3(3) = 9

There is no other rational interpretation.

[Anonymous No.4760525]

>>4760523
Aaaand I was just about to ask how the fuck you could have possibly gotten 9...

Feels nice not to be dumb enough to actually find a way to fuck a simple equation up so badly.

[Anonymous No.4760531]

>>4760523
your third line should be 3*(1/3)

>europeans

[Anonymous No.4760530]

Order of operations. Seriously? The answer is 1 obviously.

[Anonymous No.4760532]

>mfw I'm from Europe and I got 1.

[Anonymous No.4760533]

Americans will say 9
Europeans will say 1

[Anonymous No.4760535]

<span class="math">6\div2(1+2)=?[/spoiler]
<span class="math">(1+2)(6\div2(1+2))=?(1+2)[/spoiler]
<span class="math">6\div2=?+2?[/spoiler]
<span class="math">(2)6\div2=(?+2?)(2)[/spoiler]
<span class="math">6=?2+4?[/spoiler]
<span class="math">6=6?[/spoiler]
<span class="math">6\div6=6?\div6[/spoiler]
<span class="math">1=?[/spoiler]
<span class="math">\bf{problem?}[/spoiler]

[Anonymous No.4760537]

One is the most logical answer, Americans need to get with it.

[Anonymous No.4760538]

Not that I care about shitty arithmetic notations, but...

>>4760530
>Order of operations.
Brackets: 6/2(3)
Left to right: 3(3)=9
Multiplication does not get preferential treatment above division, faggot.

[Anonymous No.4760540]

Multiplication and division are on the same rank of order of operations, and so it goes left to right in performing them.

9.

[Anonymous No.4760542]

http://www.physicsforums.com/showthread.php?t=494061
pf has spoken.
/thread

[Anonymous No.4760543]

>>4760538
>>4760540
PEMDAS begs to differ, niggers

[Anonymous No.4760544]

>>4760512
obvious troll thread. Trolls answer 1 because trolls and people will get mad

[Anonymous No.4760547]

6÷2(1+2)=6÷2+4=3+4=7

[Anonymous No.4760548]

>>4760542
Why would you link a PHYSICS forum for a MATH problem? You're just proving that physicists are dumb. See the first answer here:

http://math.stackexchange.com/questions/33215/what-is-48293

[Anonymous No.4760549]

http://www.wolframalpha.com/input/?i=6%2F2%281%2B2%29

Anyone who disagree is obviously OP trying to prolong his shitty thread.

/thread

[Anonymous No.4760552]

>>4760549
Cosmic AC has spoken.
/thread indeed.

[Anonymous No.4760553]

>>4760538
But that's wrong you fucking retard.

OP's pic = 6/[2(1+2)]

[Anonymous No.4760554]

>>4760549
wrong

http://www.wolframalpha.com/input/?i=6%2F%282%281%2B2%29%29

[Anonymous No.4760555]

>>4760553
Getting a bit desperate are we?

[Anonymous No.4760556]

Strictly speaking, the answer is 9.

HOWEVER

If a mathematician wrote this equation out seriously, there's a good chance he would, off the top of his head, be expecting 1 as the answer, because breaking up an implicit multiplication by order of operations is just... poor form.

If you write out an equation with an implicit multiplication that gets broken up by order of operations, you're a clown.

Pic very related.

[Anonymous No.4760557]

PEMDAS is actually PEMA. PEMDAS is a dangerous way to teach it because of this. You need to consider division to be the same as multiplying a fraction. You need to consider subtraction to be the same as adding a negative. You niggas got trolled by the education system.

PEMA 5EVA

The answer is 9.

[Anonymous No.4760558]

>>4760514
American (regrettably) here, it's clearly 9 how could anyone say otherwise.

[Anonymous No.4760561]

>>4760553
>>4760554

>adding brackets where there were none

shit nigger what are you doing to the maths

[Anonymous No.4760562]

6/2(1+2)=?
6/2=?/(1+2)
6=[?/(1+2)]*2

[Anonymous No.4760563]

This fucking sign
The ultimate internet troll in maths

[Anonymous No.4760564]

>>4760556
To follow up to myself, I teach computer science. For some reason, CS undergrads love problems like these. I periodically get asked to answer one to solve some debate or such.

The correct answer?

*Ahem*

"Stop wasting everyone's time and use more parentheses."

[Anonymous No.4760565]

>>4760555

Nope. Why should I when I'm right?

[Anonymous No.4760569]

>>4760561
everything to the right of the division sign is the denominator

[Anonymous No.4760570]

>>4760569

There is no indication of that so assuming so is flawed

[Anonymous No.4760571]

>>4760561
There are brackets but they are just omitted faggot.
Observe faggot : (+6) = 6
Faggot.

[Anonymous No.4760573]

>>4760571
+6 is not used in mathematics. There is only 6 and -6

[Anonymous No.4760574]

>>4760570

So instead you assume there are brackets around (6/2)(1 + 2)? Because that's the only way you can end up with 9.

you fail at logic

[Anonymous No.4760575]

>>4760571

>There are brackets but they are just omitted

THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS THIS IS NOT HOW MATH WORKS

[Anonymous No.4760577]

>>4760574

No, I do so because a linear problem with arabic numerals is handled in a left-to-right manner.

[Anonymous No.4760581]

>>4760573
http://www.wolframalpha.com/input/?i=+%28%2B6%29

http://www.wolframalpha.com/input/?i=6

[Anonymous No.4760584]

6/2(1+2)

6/(2+4)

6/6

why is this so hard to understand?

[Anonymous No.4760585]

>>4760512
ITT: People think arithmetic is math and is worth arguing over.

[Anonymous No.4760586]

>>4760574
This. And goddamn, this is a fucking troll thread people.

[Anonymous No.4760588]

>>4760543
PEMDAS is a shitty mnemonic, since the M and D and the A and S are interchangeable.

And the fact that you even need it to remember the order proves how bad you are at math, and how you shouldn't be on here

[Anonymous No.4760589]

>>4760575

Yes it is. Just put both i.e. (+6) and 6 into Wolphram.

[Anonymous No.4760591]

>>4760584

>6/2(1+2)
>6/(2+4)

This is what you're doing wrong, the 6/2 takes priority over 2*3. Division and multiplication are on the same rung of order of operations and handled left-to-right.

[Anonymous No.4760592]

>>4760577
Then you should agree with my original point that everything to the left of the division operator is the numerator and everything to the right is the denominator. Because that's sort of how division works. Answer is 1 and only 1.

[Anonymous No.4760595]

>>4760589
Wolfram is an advanced programming language, it is not math.

Everyone who insists on an answer is wrong. Order of operations is learned with explicit (not implicit) multiplication, and noone uses that divide sign past elementary school.

[Anonymous No.4760593]

>>4760571
>>4760589

They are equivalent values but you are still not proving your original claim that there are "omitted brackets" anywhere. That's not how math works, and stating an equivalent value in brackets does not mean the other value is "omitting brackets".

[Anonymous No.4760596]

>>4760591

except it's not 6/2 it's 6/2(3)

which is 3/3 = 1

[Anonymous No.4760606]

>>4760596

The brackets do not make the second function take priority over the first function, the brackets dissolve after their first-priority function complete. It becomes "6/2*3", which is resolved as 9.

[Anonymous No.4760612]

>>4760595
Wrong. For instance, in programming you use the "/" symbol to indicate a division, NOT the ":" symbol.

[Anonymous No.4760613]

6/2(1=2) = x

solve for x

solution:

divide throughout by 2

3/(1+2) = x/2

3/3 = x/2

1 = x/2

=> x = 2

you are all wrong

[Anonymous No.4760619]

>>4760613

>1=2

[Anonymous No.4760620]

Last time I checked, this was the Science and Math board, not the Grade School Arithmetic board.

[Anonymous No.4760623]

>>4760595

>Wolfram is an advanced programming language, it is not math.

[Anonymous No.4760621]

>>4760619
should read
>6/2(1+2) = x

my bad

rest is correct

[Anonymous No.4760635]

>>4760612
In programming you use whichever symbol the programming language lets you use, dumbass.

>>4760623
Explain how that's wrong.
Protip: + is not defined as a unary operation on a field.

[Anonymous No.4760640]

>>4760635

>In programming you use whichever symbol the programming language lets you use, dumbass.
In which programming language have you seen ":" used to indicate a division instead of "/" ?

>Explain how that's wrong.
Wolphram isn't possible without mathematics you dumb fuck. It is entirely math.

[Anonymous No.4760653]

>>4760640
>In which programming language have you seen ":" used to indicate a division instead of "/" ?
Are you really that stupid? A programming language isn't defined by using a specific set of symbols.

Wolfram performs mathematical operations, yes, but it takes input as a programming language. Calculators are not "math" either, they are tools.

[Anonymous No.4760663]

>>4760653
>Are you really that stupid? A programming language isn't defined by using a specific set of symbols.

What the actual fuck are you talking about? I never said anything regarding the definition of a programming language. I'll stay focused : In every fucking programming language, to my knowledge, "/" is fucking used to indicate a division, you mentally challenged faggot.

[Anonymous No.4760665]

>>4760663
You are implying that it is not a programming language because it does not use "/" for division, are you not? In that case, my argument applies, and you are indeed a fucking retard. Otherwise, you are just speaking nonsense, and therefore are a fucking retard.

There are esoteric languages that don't use any of the normal constructs. Go try some brainfuck or something.

[Anonymous No.4760666]

>>4760663
That just makes wolfram a retarded language, but doesn't refute that it is one.

[Anonymous No.4760669]

saged

[Anonymous No.4760672]

Correct answer as taught in America is 9

If you don't get nine you skipped classes.
Ultimately it is really irrelevant

[Anonymous No.4760674]

>>4760543
Not It doesn't.

by that logic its 9.

[Anonymous No.4760694]

>>4760538
>implying left gets any preferential treatment above right
>implying multiplication is not comutative

[Anonymous No.4760732]

6/2(1+2)=?
6/2+4=?
3+4=?
7=?

[Anonymous No.4760738]

>>4760694
>implying division is commutative

[Anonymous No.4760742]

6/2(1+2)
6/2(3)
6/6
=1

order of operations....i thought this was /sci/
o and American you fucking hypocritical peon

[Anonymous No.4760746]

Division and multiplication are evaluated left to right with equal precedence, so 9.

[Anonymous No.4760748]

>>4760732
thought this but you can work in the parentheses before distributing

[Anonymous No.4760747]

>>4760738
>implying it isn't

[Anonymous No.4760751]

>>4760746
your retarded....post your IQ

[Anonymous No.4760754]

>>4760751
My IQ is 90 but we all know that IQ is meaningless bullshit. All my friends can confirm that I'm highly intelligent.

[Anonymous No.4760756]

>>4760751
Is this form of /sci/ troll?

[Anonymous No.4760761]

>>4760754
IQ is meaningless [sotto voce]if you are black or australian aboriginal[/sotto voce]

[Anonymous No.4760766]

>>4760761
Or if you're studying biology.

[Anonymous No.4760770]

Either I'm being trolled or I immensely overestimated how smart you people on here really are. The answer is 9 and if you disagree you know nothing about simple math basics.

[Anonymous No.4760775]

>>4760770
lel

[Anonymous No.4760886]

>>4760770
I want to believe it's just an influx of trolls from /b/, but because of the shit-tier youth generation that the new world order and Justin Biebler have bred, it would leave me not particularly surprised.

[Anonymous No.4760889]

>>4760512
It's summer, and most Highschools are out

[Anonymous No.4761275]

Feeling smart because of ambiguous notatiion.
Oh /sci/....

[ohhhlawdy No.4761755]

answer is 1. Inside parenthesis first, multiply, then divide. PEMDAS my friends, PEMDAS.

[Anonymous No.4761773]

>>4760512
1
I am from South America,

[Anonymous No.4761776]

>>4760770
>>4760886
See >>4760548
It is you who are retarded.

[Anonymous No.4761781]

>>4760514
Americans are taught to use PEMDAS or whatever form from
>left
>to
>right

[Anonymous No.4761792]

>>4760512
I'm american and I say 9.

parenthesis shouldn't have special treatment it's just a multiplication of (something), it's the same as asking what is:
6/2x
where x=1+2
this is still 9,
it would have to be 6/(2x) to be 1.

[Anonymous No.4761829]

>OP using shitty notation to troll /sci/
>73 responses later

[Anonymous No.4762055]

<span class="math"> [/spoiler]

[Anonymous No.4762070]

It's actually 4.

[Anonymous No.4762073]

>>4760556
I understand the comic...

[Anonymous No.4762094]

all this proves is that there ought to be a better way to write mathematical equations

[Anonymous No.4762145]

>>4762094

There is

http://en.wikipedia.org/wiki/Reverse_Polish_notation

[Anonymous No.4762174]

6 6 6
_____ = _____ = _ = 1
2(1+2) (2+4) 6

[Anonymous No.4762231]

*sighs* Another American here. And when in school, I remember hearing about PEMDAS, but I also remember my teacher saying to throw it out; there are only 4 steps to remember. This has been stated, but since some people are still trying to use PEMDAS for wrong answers, I'll break things out:

CORRECT-
1. Start with parenthesis. In this case, we get 6/2(3).
2. Evaluate exponents. This equation has none, so we can skip this step.
3. Evaluate multiplication AND division, left to right. Looking at the equation again, 6/2(3), there is an implied * between the 2 and 3, which makes that equal 6/2*3. Now, in order, we get 6/2=3, then 3*3=9. 9 is thus the correct answer.
4. Addition and subtraction would be applied now, but the equation is complete.

So, where is the mistake? Well, several are being made. Prioritizing multiplication over division is wrong; both increase and decrease numbers in a similar fashion. (I don't really know how to word this well.) Factoring seems to be where the other error lies. While 2(x+y) does equal 2x+2y, this is a case of working with a multiple- a case of multiplication, and thus, should be done with that phase. Doing such first violates the order of actually evaluating the parenthesis first. To get the answer of 1, an additional set of parenthesis would be needed to encompass the (2*(1+2)) clause.

This also shows why fractions are more commonly used:

6
---------
2(1+2)

does NOT equal

6
-- (1+2)
2

[Anonymous No.4762240]

BODMAS MOTHER FUCKERS

9

[Anonymous No.4762247]

9 I'm from California. Europeans won't say anything because they're afraid to offend fans of number 1

[Anonymous No.4762290]

I though science was smart... Probably dumb due the americans

The correct answer is 9.

6/2*3
3*3
9

[Anonymous No.4762408]

ITT people who don't know shit about OoO

It's P=E>M=D>A=S. Here, I'll put it into a tier list for you fucking niggers.

Goes First Tier From Left to Right: Parentheses, Exponents

Goes Second Tier From Left to Right: Multiplication, Division

Goes Third Tier From Left to Right: Addition, Subtraction

American btw, I'm just not taught by incompetent harpies.

[Anonymous No.4762410]

>>4762408
>parentheses in same tier with exponents
If you're going to show off in a troll thread, at least get it right.

[Anonymous No.4762411]

>>4762408
>parentheses in same tier with exponents
If you're going to show off trivial crap in a troll thread, at least get it right.

[Anonymous No.4762416]

I'm European and I refuse to answer poorly formed questions. Come back when you have removed the ambiguity from your question.

[Anonymous No.4762423]

I am going to make you ALL mad.

6 / 2(1+2) = ?
6 / 2(3) = ?
6 / 6 = ?
6 / ? = 6
? = 6 / 6
? / 6 = 1 / 6
? / (6 * 1) = 1 / 6
6? / (6 * 1) = 1
6? = 1(6 * 1)
? = 1(6 * 1) / 6
? = (6 * 1) (1 / 6)
? = 6(0.16666666666666666...)
? = 0.999999999999...

I'll leave you to quibble from there.

[Anonymous No.4762436]

>>4762423
0.999999999999... = 1
If you don't understand this you're retarded.

[Anonymous No.4762438]

Californian here, the answer is 1, the left to right priority only comes into play when deciding between two equal group one priorities, group one being Pemdas

6/2(1+2)

thus Parentheses have to be done first
6/2(3)

this is where it gets tricky but I believe this isn't a fraction but a division of two whole numbers
its not 6 over three but it is 6 divided by 3

therefore 3 x 3 = 6
and then it becomes 6/6 aka 6 divided by six

end result being 1

[Anonymous No.4762441]

>>4762423
Order of operations. Addition doesn't precede multiplication.

[Anonymous No.4762444]

>>4762438


Californian also here.

You are a disgrace to our state.

The answer is 8.5 and ½

[Anonymous No.4762454]

>>4762444
Im pretty sure after arnold as governor and hollywood alone our state has no grace

[Anonymous No.4762459]

Not reading the thread but just saying that "ordinary" multiplication on the set of real number forms an abelian group, so 6/2(1+2) or 6/2*3 should be the same as 6/3*2. At least this was my thinking at first but division doesn't form such a group. This idea of precedence of some operations over others when they appear in an expression simultaneously doesn't sound very mathematical. You can't form neat algebraic structures with multiple operations (like rings) without first defining this precedence. Not too elegant. Where do binary transcendental operations such as log of a with respect to base b fall? There's also a left-precedence in the everyday arithmetic system. Did/do Arabian or Japanese mathematicians emphasize a right-precedence? Is our current system of arithmetic the only one which produces intuitively correct calculations?

[Anonymous No.4762475]

1.

[Anonymous No.4762485]

The answer is .999 repeating, but that's not an option.

[Anonymous No.4762530]

/thread

[EK !EKFnQG0UBo No.4762555]

wow, this still gets posted?
this is really old.
<<<

http://knowyourmeme.com/memes/48293

[Anonymous No.4762563]

1
>HURRR BEMDAS
I don't care, write a more clear equation, who gives a fuck what the answer is, just write an equation that is not open to misinterpretation.

[Anonymous No.4762565]

compusci here.
Parenth first, then left to right for all things of equal priority.
6/2(1+2)
6/2*3
3*3
9

[EK !EKFnQG0UBo No.4762567]

>>4762563
>'Part of a series on Trolling.'

it's written misleadingly on purpose.
maths is still universal, there's a right way and a wrong way to approach it.
PEMDAS, and always read left to right on equal priority.

[Anonymous No.4762574]

>>4762567
Maths is universal, PEMDAS is not. PEMDAS is just a convention that we've come up with, we could change it if we wanted to, it's not like calculus or trigonometry where changing the rules would make the whole area incorrect.

[EK !EKFnQG0UBo No.4762575]

>>4762574
well yeh, maths is made of axioms that are all decided by humans, but its like language; as long as we all stick to the same way, it works.

[Anonymous No.4762577]

>>4762575
When it becomes like a language it stops being universal. We should just replace PEMDAS with a better rule stating that if you don't use brackets to avoid confusion that the answer is always undefined.

[EK !EKFnQG0UBo No.4762580]

>>4762577
meh
the only people who would post it in a misleading way would be trolls anyway. anyone else will make it clear.

[Anonymous No.4762581]

>>4762530
>g
hurr

[Anonymous No.4762595]

>>4760751

[Anonymous No.4762604]

>>4762581
9.81

[Anonymous No.4762606]

>>4760512
It is ill defined. (1+2) obviously goes first, but if 2*3 goes before 6/2 is not given.

[Anonymous No.4762614]

>>4762606
>It is ill defined
No, it isn't. If you think it's ill defined it's a failure of your understanding of the order of operations.

[Anonymous No.4762615]

>>4762614
samefag here

change the "6 [divided by] 2" to "6 x 1/2" and the confusion completely disappears. you're just dumb.

[Anonymous No.4762630]

>>4762615
or even 6x0.5 if you think it's the presence of a number in fractional form that causes confusion. dumb dumb dumb.

[Anonymous No.4762633]

6/2(1 + 2)

6/2 + 4

3 + 4

7

[Anonymous No.4762636]

>>4760564
Like this

gota love computers

[Anonymous No.4762648]

>>4762636
>2012
>using java for maths

fucken lol.

python > all other languages. look at that shit getting it right first time.

[Anonymous No.4762650]

>>4762648
mistyped captcha forgot to upload picture fail

[Anonymous No.4762683]

>>4762648
>>4762650

>2012, using python
Stay poorfag.
Matlab master race reporting.

[Anonymous No.4762686]

>>4762648

really, you think i give two shits about what language I use to execute a few lines of code that I didn't save, maybe I should of used machine code, would that of made the coding gods happy.

[Anonymous No.4762690]

>>4762683
matlab's cool, it can stay.

[Anonymous No.4762694]

>>4762686
have, not of. also, if you're just executing "a few lines of code" you should familiarise yourself with an interactive language. far handier and much more capable than opening up an ide, producing a stub class and running inside some shit vm.

[Anonymous No.4762701]

>>4762694


I'm sorry my current programing environment is not up to your stringent standards. next time i will type it in punch cards if that's ok by you

[Anonymous No.4762804]

The denominator always has to be in parentheses.

That's also how pretty much all programming languages implement it, btw.

[Anonymous No.4762814]

>>4762804

That's also why division is not written like this in anything but elementary school.

[Anonymous No.4762988]

>>4760543
https://en.wikipedia.org/wiki/PEMDAS#Mnemonics