/sci/ - Science & Math

[Anonymous No.12221497]

why humanities intelligent is plummeting by 50% every 10 years? is Flynn Effect a statistical pseudoscience?

[Anonymous No.12221502]

>>12221497
ok hoping I can be the first response
you need to stop looking into this stupid race Iq shit. humanities intelligence is not "plummeting." there's no evidence for this. there is no good way of measuring intelligence, since it depends on so many factors

if you put an iPad game in front of Archimedes, I think he would fucking fail it. would that make him a retard? no.

[Anonymous No.12221522]

>>12221502
archimedes cant use a computer what fucking retard lol.

[Anonymous No.12221525]

>>12221497
y(x) = 4x/2x2 = 4/2x = 2/x
y(2) = 1

[Anonymous No.12221528]

>>12221497
>2+2=4
>8/2=4
>4*4=16
Am I wrong here?

[Anonymous No.12221532]

>>12221522
they had computers back then, just no ipads

[Anonymous No.12221534]

>>12221528
2+2=4
8/2 = 4
4/4 = 1

[Anonymous No.12221550]

>>12221534
Why are you dividing 4 by 4? You should be multiplying it.

[Anonymous No.12221560]

>>12221497
>let's use ambiguous symbology
>why are people confused?

[Anonymous No.12221634]

Have you retards never heard of PEMDAS? Sad.

[Anonymous No.12221658]

>>12221560
I agree it's a retarded question and not actually about math at all, but why is this considered ambiguous? Basic order of operations should give you 16. After evaluating expression inside parenthesis you're left with multiplication and division which is evaluated left to right.

[Anonymous No.12221676]

>>12221658
implied multiplication is done before explicit multiplication, retard

[Anonymous No.12221704]

>>12221497
How do people not know how to do fucking PEMDAS. Just look at>>12221534. This guy>>12221528 is correct in the steps. Parenthesis, and then go from right to left with Multiplication/Division as they have the same weight.

[Anonymous No.12221721]

>>12221676

[Anonymous No.12221728]

I thought /sci/ was smart

[Anonymous No.12222019]

Even if you can't remember PEMDAS, Wolfram Alpha or any good quality calculator will know the order of operations. Laura's university should revoke her degrees.

[Anonymous No.12222049]

>>12221497
The truth is its ambiguous. PEMDAS and such are approximations for memorization's sake. They approximate the actual instructions of: parentheses, exponents, multiplication and division left to right and top to down. Addition and subtration left to right and top to down. But thats not an easy acronym

[Anonymous No.12222050]

>>12221497
The main problem here is that she clearly took pre-calc 3 times and is passing that off as multivariable calculus.

[Anonymous No.12222056]

>>12221704
Dumb is a contagious disease these days.

[Anonymous No.12222059]

>>12221497
Why is everybody suddenly pretending order of operations is a social construct to troll on the internet?
I see this EVERY DAY on /b/.

[Anonymous No.12222061]

>>12221532
Youre trying to defend Archimedes lol that stupid idiot who modern day experts predict he couldnt even operate an iPad he's so dumb

[Anonymous No.12222063]

>>12222019
>laura
found the problem

[Anonymous No.12222066]

>>12222059
We're dealing with a world where 2+2=5 is considered a brave and empowering statement.

[Anonymous No.12222079]

>>12221502
>ok hoping I can be the first response
you succeeded and im glad you did. fpbp

[Anonymous No.12222081]

damn its another implied multiplication pemdas shitpost thread, havent seen this one before

[Anonymous No.12222092]

>>12222059
It is literally a social construct. I am a Platonist but notation is what it is

[Anonymous No.12222097]

>>12222092
Did humans agree on the order of operations? Or did humans discover that order of operations can only work a certain way?

[Anonymous No.12222101]

>>12222097
Of course it can work in other ways. Notation doesn't even have to be infix.

[Anonymous No.12222106]

>>12221497
Imagine having two wasted degrees.

>>12221528
You are correct.

[Anonymous No.12222113]

>>12222101
>>12222101
>Of course it can work in other ways
using OP's pic, are you saying you can go against pemdas and still get the answer of 1?

[Anonymous No.12222131]

>>12221497
Laur thing explains current state of numbers science perfectly

[Anonymous No.12222159]

>>12222113
What I mean is that there are multiple possible orders of operations.

[Anonymous No.12222168]

>>12221502
JUST ACCEPT IT GOYIM

[Anonymous No.12222189]

>>12221528
no the definition of a%b*c = a/(b*c).

This is the reason nobody competent in mathematics ever uses the % symbol for division.

people who have to utter the acroynm "PEDMAS" are mathlets.

[Anonymous No.12222191]

>>12222019
except you didnt use the correct symbol

[Anonymous No.12222360]

>>12221550
>>12221704
worked

[Anonymous No.12222403]

>>12221502
>I think he would fucking fail it
he would struggle with language and arabic numerals, but touch controls are as intuitive as you can get

[Anonymous No.12222415]

>>12221704
>PEMDAS
ew who says it like that, are you an old man? Its BODMAS

[Anonymous No.12222457]

>>12221528
>>12221704
PEMDAS doesn't explicitly define a few common parts of notation, including the division sign (÷) versus the fraction bar and explicit multiplication (a × b) versus coefficient multiplication (ab). It makes no distinction between these four operations:

> a ÷ bc
> a ÷ b × c
> a / bc
> a / b × c

The second one has a clear answer (a ÷ b first) because it is defined in PEMDAS, but the third one has a different intuitive answer (bc first) because of how we typically work with coefficients. [x ÷ 2 × y] is not the same as [x / 2y] because you interpret the former as a division sign & multiplication sign, while you interpret the latter as a fraction bar over a coefficient.

Going by this same logic, we can construct these notations to suss out the "intuitive" answer to these in the absence of an explicit definition:

> 2y ÷ 2 × y
> 2 × y ÷ 2y

These two use the same operations in the same order, but if you do them, you get two different results: y2 and 1. This says that coefficient multiplication comes before explicit multiplication no matter where it is in the operation. Since explicit multiplication and the division sign are at the same priority in the order of operations, we can therefore deduce that coefficient multiplication comes before the division sign.
.
..
tl;dr: PEMDAS should instead denote the following:

> Functions (cos, log, sqrt, et cetera)
> Fraction operands &
> Parentheses
> Exponents
> Coefficient multiplication
> Multiplication (explicit) &
> Division
> Addition &
> Subtraction

[Anonymous No.12222484]

>>12221721
>Thinking mathematical syntax is actually well defined and not an ad hoc collection of shit people who wrote math out happened to come up with

[Anonymous No.12222497]

>>12221497
Why is this so difficult for people? Its like reading you always go left to right. 8:2=4. 4x(4)=16

[Anonymous No.12222526]

>>12222497
8 ÷ 2y

y is 4

[Anonymous No.12222528]

>>12221704
>PEMDAS
It's BEDMAS you eurotard

[Anonymous No.12222531]

>>12221658
because the order of operations is very easy to misremember, symmetric error

[Anonymous No.12222536]

PEMDAS with M and D being equivalent but it's calculatedf form left to right, it's 16.

[Anonymous No.12222541]

>>12221502
Said by the very people who live in almost exclusively white neighborhoods. The proof is in the pudding, anon. You either walk your talk without us having to needle you for lying or you look like you don't believe what you are saying. Also called a cope post.

[Anonymous No.12222567]

>>12221497
intelligence is the square of IQ

[Anonymous No.12222584]

>>12221497
vaccines, contaminants, heavy metals, pollution, socialism, indoctrination, technology addiction, no real reading, etc.

apparently when people were hunter gatherers millions of years ago their teeth was perfect, jaw, everything, they did not lose their teeth with old age, but physicians and dentists just ignire this even though 90% of the modern population will have cavities or gum disease in some point of time, yet science just ignores these facts, een when old scientists have done works on it already (like weston price and others)

[Anonymous No.12222941]

>>12222189
>>12222457
>Imagine being this retarded

[Anonymous No.12222987]

>>12221534
Retard. Just absolutely retarded.

[Anonymous No.12223020]

>>12221497
8/2*(2+2)
= 8/2*4 <- parentheses first
= 8*1/2*4 <- this time no parentheses so this should be calculated like this. Remember to be consistent
= 4*4
= 16
thanks for coming to my primary school math class

[Anonymous No.12223029]

>>12222191
Yes he did, dumb whore . Division is division, no matter what glyph you use to represent it.

[Anonymous No.12223035]

>>12222457
>PEMDAS doesn't explicitly define a few common parts of notation, including the division sign (÷) versus the fraction bar
PEDMAS defines the precedence of division. Division is division no matter what symbol you use to describe it.

Absolute retard, drink bleach.

[Anonymous No.12223103]

>>12221497
16
If the whole 2(2+2) part was the divisor they would've put parenthesis around it.

[Anonymous No.12223162]

>>12223103
Based.

[Anonymous No.12223199]

>>12221497
> Using some stupid arithmetic evaluation as a way to measure intelligence, literally only autists who remember symbolic manipulation rules by heart will get this right.

OP go fuck yourself.

[Anonymous No.12223351]

8/2(2*2)=1
8/2*(2*2)=16
/thread

[Anonymous No.12223360]

>>12223351
this is correct.
multiplication and division are basically the same operator so you work left to right .

[Anonymous No.12223398]

>>12222222

[Anonymous No.12223426]

>>12223035
>>the division sign (÷) versus the fraction bar
>Division is division no matter what symbol you use to describe it.

Riddle me this. Pic related; it's division and division.

>Absolute retard, drink bleach.

[Anonymous No.12223444]

>>12221497
has only 2 math degrees? what a pleb

[Anonymous No.12223447]

>>12223035
>PEDMAS defines the precedence of division.
no it doesnt
parentheses do
any other answer is wrong

[Anonymous No.12223560]

its diversity

[Anonymous No.12223596]

>>12223426
It's the same operation, mouth breathing retard.

[Anonymous No.12223600]

>>12223351
>implicit multiplication has a different precedence from explicit multiplication
No, retard.

[Anonymous No.12223636]

>>12221704
>right to left
>blm

[Anonymous No.12223661]

>>12221497
2 + 2 = 4
8 / 2 (4) = 8 / (2 * 2 * 2 * 2)
= 1/8

t. electrical engineering bachelors

[Anonymous No.12223880]

>>12223029
the integer needs to be divided by the outcome of 2(2+2).

[Anonymous No.12223887]

>>12223661
multiplication is in priority,t hen division.

[Anonymous No.12223939]

The division sign seems to turn normally sane individuals into insane ones
Someone who barely knows elementary algebra would tell you this equals 1

[Anonymous No.12223947]

8/2(2+2)
4(2+2)
6+2
8

[Anonymous No.12223962]

>>12223939
Your pic is 8/(2(2*2)) tho

[Anonymous No.12223973]

>>12221497
using the division sign in drawn out calculations like this is brainlet

[Anonymous No.12224051]

>>12221497
lack of eugenism

[Anonymous No.12224189]

>>12223103
Everyone knows that when you use % as a division symbol there are implied sets of parentheses to the left and right of it. It's basically a fraction bar.

[Anonymous No.12224218]

>>12223962

Exactly which means you've already answered the question
if those parenthesis make the answer 1 then the absence of them must make the answer to the OP equation 16

[Anonymous No.12226078]

>>12221528
You're correct

>2 math degrees and still can't follow simple rules

[Anonymous No.12226131]

>>12223596
you're the dumbest nigger i have ever seen, you've barely passed your highschool math and you come to lecture people on math notation? i really hope you're underage because otherwise you're the dumbest christcuck nigger i have ever seen

[Anonymous No.12226138]

Why the fuck do you brainlets unironically discuss such a stupid fucking question?

[Anonymous No.12226143]

>>12221497
>is Flynn Effect a statistical pseudoscience?
it's just that the average is increasing becase no more slaves and better global qol

[Anonymous No.12226172]

>>12221497
People are getting retarded. Some idiot declared copper toxic and copper deficiency causes mental retardation.

[Anonymous No.12226175]

The answer is 16, at least that is the answer for the modern method of solving that problem.

[Anonymous No.12226178]

>>12226175
you've never studied math

[Anonymous No.12226193]

>>12221497

[Anonymous No.12226195]

>>12221497
> 8/ 2*(2+2)
>8/ 2*(4)
>8/8
>1
how is this even up for debate lmao

[Anonymous No.12226198]

>>12226178
brackets first, then multiplication/division, then left to right.
If you work with the rule that not explicitly typing a multiplicator gives it priority (which i never heard to be used that way), you’re a cocksucker and should specify that. Otherwise just use a bracket to assign priorities.

[Anonymous No.12226210]

>>12226198
you've never studied math

[Anonymous No.12226229]

>>12226195
because 8/2*(2+2) =/= 8/(2*(2+2)))

[Hououin Kyouma No.12226255]

First do the parentheses, after that do the division or multiplication in the order in which they appear.

>8/2(2+2)
>8/2(4)
>4(4)
>16

[Anonymous No.12226493]

PEMDAS is for middle schoolers or computer science brainlets who can't do math. The division symbol and the parentheses clearly imply two terms (8 over 2[2+2]). Anyone who says otherwise should go back to eating crayons and writing their shitty python programs and fuck off to /po/ or /g/.

[Anonymous No.12226516]

>>12221525
>>12221534
How is /b/ smarter than /sci/? This is honestly pathetic you guys

[Anonymous No.12226519]

OMG just use SHUMBAS

[Anonymous No.12226524]

Human intelligence seems to be relatively stable throughout history. Sure, you are much more capable of abstraction than the ancient peoples but you'd be surprised at their ingenuity with the limited knowledge at their disposal.

[Anonymous No.12226555]

>>12222063
Fucking based

[Anonymous No.12226568]

>1820
>nothing to do but practice your skills

>1920
>get a news paper every couple of days

>1950+
>non stop stream of entertainment piped into every home through the TV

>2007+
>non stop entertainment you can pick pumped into every home

>2013+
>non stop entertainment assisted by neural networks to keep you watching pumped into every persons pocket

[Anonymous No.12226586]

>>12221497
8/2(2+2)
(2(8/2)+2(8/2))
8+8
16
4(4)
8/2(4)
8/2(2+2)

[Anonymous No.12226619]

>PEDMAS
>PEDMAS
>PEDMAS
>PEDMAS

You neckbeards are showing your lack of arithmetic knowledge.
There is more to it than OMG PEDMAS.
Before the order of operations, you need to apply mathematical properties first.
8/2(2+2)=?
Because the 2 before the (2+2) is multiplication, you have to apply the Distributive Property before even touching PEDMAS. 2(2+2) = (4+4).
That gives us 8/(4+4).
NOW you can use PEDMAS.

Much like (2+3)(4+5) isn't (5)(9) = 45.
You have to use the FOIL property before PEDMAS.
This is high school level shit, you idiots need to open a fucking book.

[Anonymous No.12226692]

Reminder that PEMDAS/PEDMAS etc only applies to basic bitch pleb arithmetic that's ambiguous. If you're doing anything serious with people who have more than three braincells, you won't be working with ambiguous statements.

[Anonymous No.12227082]

>>12226493
I never heard about PEDMAS and BODMAS before reading these threads

[Anonymous No.12227894]

A physicist writes down p^2/2m. Is it a momentum?

[Anonymous No.12227950]

>>12226619
>Much like (2+3)(4+5) isn't (5)(9) = 45.
>You have to use the FOIL property before PEDMAS.
Are you retarded? (2+3)(4+5) = 2(4+5) + 3(4+5) = 5(4+5) = 5*9 = 45

[Anonymous No.12228297]

>>12221497
is there an order of operations protocol or anything i can read?

[Anonymous No.12228486]

>>12221528
No. Division [math] \div [/math] is just multiplication by a multiplicative inverse. [math] \div [/math] is just shorthand notation. Multiplication is associative and commutative.
[math] 8 \div 2 (2+2) = 8 \times \frac{1}{2} (2+2) = 4 (2+2)= 4(4) =16 [/math]

[Anonymous No.12228878]

>>12226131
Not him but pemdas also says you need to do operations from left to right if they are the same.

[Anonymous No.12228888]

>>12221658
because proper math notation is not left for interpretation, just use more parentheses and nobody will bitch about it

[Anonymous No.12228897]

The real lesson of this is that parentheses are cheap, people. Use them.

[Anonymous No.12228925]

>>12226210
cause he was busy having sex

[Anonymous No.12228929]

>>12221704
>pemdas virgin
>not using the glorious chad BODMAS

It's 16 by the way you fucking middle schooler.

[Anonymous No.12228944]

>>12228897
Parentheses are overlooked as a fundamental part of writing an equation. They actually have a basis in math because they explicitly tell you which operation comes first.

Meanwhile PEMDAS has no real basis in math, Some people get the impression that it does because they've had it drilled into their minds at a young age that multiplication always comes before addition, and that's just the way it is. It's not the way it is though. All PEMDAS does is let us write fewer parentheses by saying that some of them are implied. There's no fundamental property of multiplication and addition that says how to go about solving 2 * 3 + 4. By convention we assume that this expression means (2 * 3) + 4 and not 2 * (3 + 4), but there's no real reason for us to do so than convention.

The real rule should just be P for parentheses. The EMDAS doesn't even matter.

[Anonymous No.12228949]

It's just a stupid divisive order-of-operations question. It's meant to generate conflict between people who follow the strict BEDMAS order and those who multiply things touching with brackets first. The usage of the division symbol rather than a fraction is at fault here, if you're ever doing anything where arithmetic expressions have to be unambigious just use a fraction for division.

[Anonymous No.12228960]

>>12228949
>>12228944

it's a syntax problem.

[Anonymous No.12228992]

Please ignore this faggot.

Damn the numbers seem too good, wonder who got it.
>>>12222222
>>12222222

[Anonymous No.12229028]

>>12223596
Use parentheses you mongoloid

[Anonymous No.12229933]

The answer is those two need to 69 on camera.

[Anonymous No.12229956]

>>12229933
They're both trannies

[Anonymous No.12230011]

>>12228878
>pemdas
i fucking hate you american retards, see:
>>12223596
>>12226131
the smaller fraction bar takes precedence over the bigger one, this is a common math notation if you've finished middleschool, you're a fucking retard. don't ever have an opinion in the matters of mathematics, especially since you've barely passed highschool, you fucking white nigger

[Anonymous No.12230046]

>>12226619
>you have to apply the Distributive Property before even touching PEDMAS
why are you people even on this board? you've never studied science nor math, you've barely passed highschool courses. why do you have to further embarrass yourselves?

[Anonymous No.12230921]

>>12223880
why? Isn't 8*1/2*(2+2)?

[Anonymous No.12231681]

>flynn

[Anonymous No.12232039]

g-guys?!??!1

[Anonymous No.12232043]

>>12232039
got this with wcalc though

[Anonymous No.12232065]

>>12221502
>there is no good way of measuring intelligence, since it depends on so many factors


Like literally everything that has to do with humans ever. COPE.

[Anonymous No.12234187]

>>12222528
its BIDMAS
t. eurotard

[Anonymous No.12234212]

>>12234187
Its PENIS

Parentheses
Expressions
Numbers
Indexes
Square

[Anonymous No.12234241]

>is IQ """"""""""""""""""""""approximation"""""""""""""""" a pseudoscience?
Yes.

[Anonymous No.12234357]

>>12221658
People don't realize that division and multiplication are the same operation. So they see peDMas and think "division HAS to occur before multiplication. They understand order of operations, but not that division and multiplication are performed in the order which they appear left to right.

[Anonymous No.12234606]

>>12221497
This is why letting women attend universities was a mistake.

[Anonymous No.12234824]

>>12221497
Always sage shitty notation like the divison sign, write it as a fraction or gtfo

[Anonymous No.12236142]

Parenthesis have priority. Hence the result is 1.

First rule I ever learned.
What the fuck have you learned?

[Anonymous No.12236186]

>>12221497
8/2 * (2+2)
8/2 * 4/1
32/2
16/1

This is the fool proof way of solving it

[Anonymous No.12236200]

>>12236142
It's 16.
Irrefutable.

[Anonymous No.12236205]

>>12221532
abbacus are not turing-complete

[Anonymous No.12236213]

>>12236205
I think you could make a Turing complete one though.
Interesting project idea.
Make an abacus that is Turing complete as if it could have been used during the Roman period or something

[Anonymous No.12236611]

With what I learned in school the answer is 16,
You do what is in brackets first, then go from left to right doing multiplication/division.

but I might have been taught incorrectly, so what is the actual answer?

[Anonymous No.12236625]

>>12221497
Can anyone tell me why they think multiplication has a higher value than division? Because they are the exact same thing just opposite of each other...

The answer is 16 you turds. Brackets - Multiplication/Division going from left to right.

[Anonymous No.12236708]

>>12236611
you're right it's 16 and everyone saying 1 is a brainlet but usually non-brainlets lurk more than post.

[Anonymous No.12236712]

Math isn't meant to be written in a single line, these problems are fucking retarded

[Anonymous No.12236727]

Since I know fractions I have never used the retarded ÷ sign.

[Anonymous No.12236746]

>>12221497
>has 2 degrees
>obviously hasn't taken abstract algebra
When expressions/variables are next to each other in a field, it is assumed to be the multiplication operation. That being said, the product becomes 8*2^-1*(2+2)=8*2^-1*4=4*4=16. Really basic stuff here, asshats.

[Anonymous No.12236762]

>>12226519
>big big SHUMBAS
>big SHUMBAS
>big SHUMBAS

[Anonymous No.12236791]

>>12222941
fucking nigger

[Anonymous No.12236980]

>>12221497
in what real life scenario would you write out an equation like this?

[Anonymous No.12238241]

>>12221497
>why humanities intelligent is plummeting by 50% every 10 years?
correlates with the male/female ratio

[Anonymous No.12238553]

>>12236980
When writing software though you'd use / for the division sign. Any decent programmer will end up using parenthesis frequently to ensure evaluation happens as intended.

[Anonymous No.12238565]

more and more blacks are being born every year /thread

[Anonymous No.12238654]

>>12236980
*click tongue*das rite nubah be dumb *click tongue* me no need no nubah *click tongue* odah o' operasho no care no need *click tongue* me hav' fingah me count good good fingah

[Anonymous No.12240352]

>>12234212
>indexes

[Anonymous No.12240369]

8/2*(2+2) = 8/2*(4) = 8/8 = 0.9999

you're welcome

[Anonymous No.12240476]

>>12222528
BEDMAS :DDDDD

[Based Negroid No.12240530]

>>12228486
Yeah, thats what he said

[Anonymous No.12240662]

This is basic PEMDAS 1st grade shit, you goddamn morons.

[Anonymous No.12240675]

>>12222415
>>12228929

Who ever says BODMAS is a fucking zoomer.

[Anonymous No.12240698]

>>12240662
>safe sex with dogs
>shadbase
hmmm yeah i'm thinking he's based

[Anonymous No.12240700]

>>12221497
8 / (2(2+2))
8 * (1/(2(2+2)) )
8 * 1/8
1
Simple as

[Anonymous No.12240715]

>>12240698
>>12240662
The only safe sex with dogs is letting them fuck you

[Anonymous No.12240716]

>>12240715
will a female dog bite you if you fuck her?

[Anonymous No.12240746]

>>12222049
the fuck are you talking about?
PEMA, division and subtraction aren't even actual things.
Multiplication is commutative with itself. Addition is commutative with itself.
There is no ambiguity.
8 /2 (2 + 2)
8 /2 (4)
4 (4)
16
/2 is just multiplication by the multiplicative inverse, so it must commute with multiplication.
8 /2 (4) = 8 (4) /2
16 = 32 / 2
16 = 16
it commutes, so it's perfectly well defined. There is no "approximation" here.
>>12222189
a%b*c can't mean a/(bc) because d % e % f would be ill defined if it were true. Division has one meaning in this simple arithmetic context, multiplicative inverse.

[Anonymous No.12240750]

It's 16 but the way it's wrote that's confusing. PEMDAS still applies multiplication and division is doesn't from left to right in the order in which they appear. This should help out a little:
8÷2*(2+2)

[Anonymous No.12241009]

8 / 2 * (2 + 2)
4 * 4
16

[Anonymous No.12241828]

>>12221497
Implicit multiplication takes precedence over division

[Anonymous No.12241830]

>>12241828

[Anonymous No.12242110]

>>12221497
guys i got 6

help

[Anonymous No.12242169]

>>12221502
>if you put an iPad game in front of Archimedes, I think he would fucking fail it.
you're the fucking retard. lowiq niglets pass those games

[Anonymous No.12242369]

>>12221497
Automatization of intellectual strugle, that is outsourced and then we forget how to use outsource providing machine, you gave an example.

[Anonymous No.12242408]

>>12221497
Is it 8?