Sep 1, 2022 11:41 PM
dickblack12
229718
2327
83
CasualObserver5
Dang! I guessed fried chicken.
iotaprime
Heh, that is pretty good.
daliamonra
FUCK! I teach algebra and it took me WAY TOO FUCKING LONG to get this!
TheJuiceLoosener
But technically, Shannon didn't write anything that isn't true. It isn't 5. It's 5!
Recursiv3
drnanc8888
This is so good!!!
DesmondHawkins
The answer is ambiguous due to intentional lack of signifies. The answer is truly 5 OR 5!
icbkr
This is why we can’t have nice things.
IsolatedAsshole
Oh that's clever.
ezekiel9247
While I am normally a fan of clever math jokes, this one doesn't strike me as clever at all. Abuse of notation is a real problem in math.
FailureFactory
I agree, it's purposefully formulated unclearly to point the thinger at people unlucky enough to fall for the grammatically correct reading.
ChallengerDeep
Context is key. "Is the exclamation point punctuation? Or is it a mathematical operator?"
Thorbane
With no subsequent punctuation terminating the sentence, default is punctuation.
ReverseSyzygy
"... the answer is 5!."
theyar
But then it wouldn't be funny.
Pchopsammiches
EvilKez
jeffoisdubois3000
Screenshots of instagram posts are not memes.
Epicenity
A meme is a meme no matter where you put it.....
SlightlyDodgy
When the ad's are on point
TheHengeProphet
The original poster's inclusion of proper punctuation in the rest of the post negates ! being factorial as it then defaults to a grammatical
feature. Don't mix math and grammar, folks.
everlasting1
Then his sentence is missing punctuation. He legit could have said “5!!” or to make it more obvious, “5!.” I suppose. Still, I snorted.
Zhreca
Sadly 5!! is still a valid mathematical operation 5!! = 15. So it really should be 5!. or some other delineation of meaning.
But then it wouldn't be a joke.
getthismanabeer
TIL... what a weird operator. I assumed that 5!! would evaluate like (5!)! and so had to look up why you said 15.
APuffOfAirTicklingYourNose
iN ThE UsA, FaCtOrIaLs ArE TaUgHt In 7Th gRaDe mAtHeMaTiCs
LlamaThrusts
It's like nobody was taught pemdas. Jesus fucking christ.
GoatMittens
BEDMAS
Frederf
it's the same thing
NZSheeps
#Team BEDMAS
Voric13
He's correct it is 5!
paragraph
CaptainHyperbole
Well shit. I was never taught factorials.
zephyrbell
And then there's me, not understanding any of it.
factotumjack
5! = 5 x 4 x 3 x 2 x 1
Thank you! I mean maybe we were taught it but o have no memory of it, I mean this is literally the first time I’ve ever come across it.
It's useful for combinatorics problems like "how many different 5 card poker hands are there" (Answer: 52! / (47! x 5!))
Is there a ! Button on the TI84? Or do you have to type in 52 x 51 x 50 x 49 x 48 x 47 x 46 x 45 x 44 x 43 x 42 x 41 x 40 x 39 x 38 x 37 1/
x 36 x 35 x 34 x 33 x 32 x 31 x 30 x 29 x 28 x 27 x 26 x 25 x 24 x 23 x 22 x 21 x 20 x 19 x 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 2/
it gets weird when you're asked (3.87)!
ImOPsMom
It's not weird but it gets more complicated (calculus and indefinite integration)
woozle
Hellbat666
Yup... ??♂️
StudioDerpster
"5!" (five factorial) is a shorthand for 5x4x3x2x1
Siq101
I'm in this picture and I don't like it.
Mumalot
it's so obvious... 230-220x0.5 = 230-220x0.5... duh
TsubakiTragic
There are 10 type of people on this planet, those who understand binary....
TheStreetForce
Instructions unclear. Dick caught in ceiling fan. Please advise.
Synaps4
Meanwhile the grammar club is seriously disappointed at your lack of a period after 5!.
Zombieemperor
This requires knowing what a factorial is, seeing as ive only ever run into the term twice in my life i honestly understand not knowing it
Fishkeeper
I have a migraine, so I still don't know what's going on.
ChareAndFlaff
I have a degree in math, use factorials all the time, and I had to come to the comments to figure out what the hell the joke was.
DukeSamuelVimes
I calculated it properly and got the answer straightaway, but took a few seconds to realise the amusement that it would still seem right if
someone didn't understand bidmass or factorials.
Factorials are useful somewhere? kinda shocking ngl
Sarah1987
Mathematician here. I’m going to share this on my Facebook page so I can pull a fast one on my nerdy friends. It’s a knee slapper for sure!
aloysiuscentauri
I’m going to send it to a friend via fax.
I sent it to mine using smoke signals. I’ll let you know when get a response.
e! = 4.26...
RetrogradeLlama
Actually, you need to use parenthesis, so regardless of the order, people do it correctly and don't crash a $1B lander on Mars.
Paranemec
It crashed because of rounding errors in floating point numbers, not incorrect order of operations.
RedAppleSoda
Thank you! Order of operations is an imperfect solution that isn’t intuitive and leads to needless miscommunication.
aCtUaLlY, yOu nEeD To rEaLiZe tHaT MuLtIpLiCaTiOn aLwAyS CoMeS BeFoRe sUbTrAcTiOn
SkinnerTBD
I thought that was a unit conversion issue. meters to feet and what have you.
It was... just an example of what goes wrong when math goes wrong.
Quasime
No, order of operations the answer is 120 or 5!
FiveShiftOne
You do not need to use parentheses, no.
This is an interesting article on the value of parenthesis: https://jaredantrobus.com/misc/pemdas/
FoxyEllie
As a programmer, I use paranthesis excessively because I'm otherwise going to end up confusing myself when I come back later.
"wait, does java do this operation first or this one? Fuck it, I'm enforcing this one."
Bro of course they are important. Just not in THIS case.
In THIS case, the joke actually relies on the fact that we all know “order of operations” is going to trip people up. That’s how bad it is.
That's not bad, that's the entire crux of the joke. It's what makes it clever.
having value isn't strictly necessary.
AnotherFailedAttemptAtHumor
Anybody else get 120 or am I missing something ???
adrianenspired
5!
VolcanoHerder
I also missed it the first time I saw it and I have an MS in a STEM field and have Engineer in my job title. Don't be too hard on yourself.
hipifreq
It's funny, because he means 5-factorial, which is written as "5!'. 5! = 5*4*3*2*1 = 120
UncleBuckFutter
mattbl
"Funny"
Selekta
There are 10 types of people, those understand binary and those that dont-better joke
There are 2 types of people: those that can extrapolate from incomplete data
Imalwaysready
You're right AND you're missing something.
rkymtnthunder
"5!" Means 5 factorial. Which means 5 x 4 x 3 x 2 x 1. Which equals 120.
Quizz25S
I don't even bother with shit like this. "87% of people get this wrong! Will you!?" Fuck right the hell off.
That's not really what this is.
"you probably won't believe it" That's EXACTLY what this is.
Then you didn't get it.
AnythingMuchShorter
5! = 1*2*3*4*5 but since he wrote that as a sentence, if ! is a symbol there should be a punctuation after it.
Yeah but since it's a joke and it even declares it as such, the point is to look past the literal and find the trick.
iamAWAKEincaseyouwerewondering
My thought exactly! If you’re going to make punctuation marks important in your meme, then you should be using them correctly.
So to use his format properly, if I write 5! that's 120, but not if I write 5! Written like that it's just 5.
RyanHYK
Please Excuse My Dear Aunt Sally.
GerardEngelage
Mijnheer van Dale wacht op antwoord
nat300Lord
Same
thricebakedxyz
Yes, no.
notanoldbitterbetty
I mean, I got at least 12
ThatTransformersDude
Wait, how did you get a number? I got əª
AtmaDarkwolf
er he SHOULD have ended his statement with 'is 5!.' not 'is 5!' cuz the exclamation point (in context of a forum) is end of sentence.
DigiT00l
5! Is different from 5, 5!=5×4×3×2×1=120
MrWigglees
The question is 10 x .5 = 5
MOMOnica97
I got West Dakota as an answer
simonsaysabunchofstuff
I copied this guy
Cranbananarama
West? Oh, my answer was way off.
Camwhoisit
This deserves way more thumbs up ? ? ? ?
HommeDeFeu
Soooo much better than east Nebraska, am I right
ItHappenedInThe20thCentury
I got my dick stuck in something, but it wasn't West Dakota :(
dontfloatmygoat
A mountain momma?
JustJoe2047
madjo
120 is what I got too
yep, exactly! 5!
(Which is 5!)
PineappleIsDeliciousOnPizzaFightMe
I don’t know what this factorial malarkey is, but 220*0.5=110 and 230-110 does, indeed, equal 120.
WashOutPfaffenbach
omg, thanks. I couldn't see "x" as "times"...
MadCat221
"5!" means Five Factorial, which means take that number and every integer under it down to 1 and multiply them in sequence.
bilborrax
I thought he was yelling 5
In essence, 5*4*3*2*1... which is indeed 120.
CeterumCenseo
Fun fact: 0! = 1
Ah. I didn't see that. so 5x4x3x2 = 120.
Zreen
Technically also x1 but that's redundant so
zanaria
The problem is that ! is called an exclamation mark and is used to indicate something important. Most people that arent into math wont /1
understand that it goes with the 5. Now if there were words after the 5! then people might figure it out easier. /2
GingerLaird
So what's the point of factorials?
VaudevillianVeteranCastVicariouslyAsBothVictimAndVillain
Mostly in statistics but looks like it's probably common in other math subjects as well.
Kills a week in middle school math class
Chromentor
Making math jokes.
zerovanity59
The number of way to arrange list a number of n unique items is n!
eemger
Calculating possible combinations.
tavinjer
Oh. Thank you. That actually makes sense.
mbrauen
Plenty of applications, e.g., combinatorics, probability, stats. Mathematicians are lazy so we invent symbols and notation to abbreviate.
dohcohv
5! Is 5 factorial, which is 5x4x3x2x1, which is 120. It's not very common notation.
LilCookieMonster
It's like the only notation I know. I'm european though
theguywiththevoice
I always hated it, though, for co-opting a symbol that is already in use. I didn't learn it at all in high school, but I skipped class lots
Rogerwilco1974
Well ..it's absolutely standard notation, but it's not a very well known one outside of mathsy folk that use it!
SoPoSassquatch
You don't stats much do you
theworldcouldbeflat
Stats use chi square distributions not really combinations and permutations.
5! (five factorial) = 1 x 2 x 3 x 4 x 5 = 120
Five factorial Is not in the equation.
tlvolga
This is just 120 with extra steps ?
Peepsmith
Thank you for explaining it
blumpk1npie
I didn't learn this in school. Or I did and forgot it
whothehellelseusesTingjidasausername
Ooooooooohhhhhhhhhh.... damn it
GribCake
I’m an engineer and I still think that’s bs lol
skumocomics
ty bb
feryooday
Wow it’s been way too long since maths classes. I’m old and dumb now
Dammit!! I forgot about that.
Me too - learned that at night school Algebra class.
Flexcalibur
take your damn upvote
LaughingInTheFaceOfDanger
The problem with this is while 5! Is correct people who did the math wrong but got the right answer will carry it forward. Sounds familiar..
Grimmrog
so he just was bad at writing because the anwers sentence is missing the "."
Purposefully.
SealOnLand
Never thought I'd learn math in Imgur. Gotta browse more and hope to get a degree now.
geekykeycap
You absolutely won't learn math on here lol. And most the imgurians saying theyre good at math are just talking about arithmetic.
ManByTechnicality
Are you equal parts pedantic and creative? If so a degree in math may be right for you?!
DaveTheScientist
Oh goddamnit
jimmyman999000
UprootedGrunt
Gets me every time.
MikeTheScientist
Cmon @DaveTheScientist you let’s us men of science down…
I did, and I'm not afraid to admit it. That was smooth
LuminoZero
Don't worry, I'm a STEM guy and I missed that.
Haha me too. The delivery was smooth
Theory89
I have no idea what any of you are talking about
Dumfk
That's backwards! It's 5 × 4 × 3 × 2 × 1
LordofSadFace
Honest question: would that make a difference in a multiplication ooeration?
maincarrot
Neigh. 5x2 = 10. 2x5=10. Times both by 3? Both are 30. It's all being multiplied by the same amount, the order doesn't matter.
kragnus
No, it's called the commutative property (a+b=b+a). + and × are commutative, - and ÷ are not.
AJMansfield
Factorials are only defined on Unique Factorization Domains though, meaning the multiplication is always commutative and any order is valid.
NullNameAvailable
But it's easiest to program recursively starting at n and moving down to the base-case 1
erwinmahatma
IronicDancing
WHY IS EVERYBODY MULTIPLYING BY 1?
GatDangHippies
You have to or it doesn't count.
FUCK YOU, SIMPLIFICATION IS ALWAYS PREFERABLE.
HasteTheFool
To be fair, if you DO do it, it doesn't matter.
sweetnaivety
why don't you include 0 too then, that would make solving factorials soooo much easier!
IPKOB
Also incomplete if we want to follow it to a T, 5x4x3x2x1x1
stealthgunner385
Why would you have to ×1 twice in total? Nevermind ×1 is an identity property, it should appear only once in a factorial expansion.
Its because the mathematical definition of a factorial is 0! = 1 and N! = N x (N-1)! [note including either of the 1s is pointless]
tirohtar
I think it's to represent that 0! = 1.
mIsSeD SeVeNtH GrAdE MaTh
This is the kind of thing that is, at least historicall, quickly introduced and then dropped for years.
GarrickWhaley
In my Podunk ass high school we never covered factorials.
NothingPrince
It's only done in AUS with the top 5% so most people never see it.
PectorialMuscles
This is not seventh grade math.
saldrSleepTaker
Depends what country and what type of school. I was taught factoris, combinations and permutations in grade 7
I learned them in 7th as well, but most of my counterparts later on learned them in 9th or 10th. I was in a special kids school
NauseousPanda
The poster missed 1st grade litterature. The sentence ends at '!', so what he wrote is that the answer is '5' which is false.
Alfonze423
That was 11th grade for me and I focused on math & science.
welltechnicallyimnotarobot
Hey now I've gone all the way up to multivariable calculus and it still took my dumb ass reading the comments to get the joke.
no he literally missed the point.
Slayer0026
You changed the math problem by adding the parenthesis. PEMDAS isn’t a rule, it’s a guide. The MDAS is not done in any discernible order. 1
The only rules is. Parenthesis and then exponents. If you want a particular answer or for it to be solved a certain way, then you use the 2
Parenthesis to indicate the order. Exceptions are when you have a variable and an internet together, such as 5x. That multiplication will 3
Be done before any other MDAS operations. 4/4
Integer* not internet
CasualObserver5
Dang! I guessed fried chicken.
iotaprime
Heh, that is pretty good.
daliamonra
FUCK! I teach algebra and it took me WAY TOO FUCKING LONG to get this!
TheJuiceLoosener
But technically, Shannon didn't write anything that isn't true. It isn't 5. It's 5!
Recursiv3
drnanc8888
This is so good!!!
DesmondHawkins
The answer is ambiguous due to intentional lack of signifies. The answer is truly 5 OR 5!
icbkr
This is why we can’t have nice things.
IsolatedAsshole
Oh that's clever.
ezekiel9247
While I am normally a fan of clever math jokes, this one doesn't strike me as clever at all. Abuse of notation is a real problem in math.
FailureFactory
I agree, it's purposefully formulated unclearly to point the thinger at people unlucky enough to fall for the grammatically correct reading.
ChallengerDeep
Context is key. "Is the exclamation point punctuation? Or is it a mathematical operator?"
Thorbane
With no subsequent punctuation terminating the sentence, default is punctuation.
ReverseSyzygy
"... the answer is 5!."
theyar
But then it wouldn't be funny.
Pchopsammiches
EvilKez
jeffoisdubois3000
Screenshots of instagram posts are not memes.
Epicenity
A meme is a meme no matter where you put it.....
SlightlyDodgy
When the ad's are on point
TheHengeProphet
The original poster's inclusion of proper punctuation in the rest of the post negates ! being factorial as it then defaults to a grammatical
TheHengeProphet
feature. Don't mix math and grammar, folks.
everlasting1
Then his sentence is missing punctuation. He legit could have said “5!!” or to make it more obvious, “5!.” I suppose. Still, I snorted.
Zhreca
Sadly 5!! is still a valid mathematical operation 5!! = 15. So it really should be 5!. or some other delineation of meaning.
theyar
But then it wouldn't be a joke.
getthismanabeer
TIL... what a weird operator. I assumed that 5!! would evaluate like (5!)! and so had to look up why you said 15.
APuffOfAirTicklingYourNose
iN ThE UsA, FaCtOrIaLs ArE TaUgHt In 7Th gRaDe mAtHeMaTiCs
LlamaThrusts
It's like nobody was taught pemdas. Jesus fucking christ.
GoatMittens
BEDMAS
Frederf
it's the same thing
NZSheeps
#Team BEDMAS
Voric13
He's correct it is 5!
paragraph
CaptainHyperbole
Well shit. I was never taught factorials.
zephyrbell
And then there's me, not understanding any of it.
factotumjack
5! = 5 x 4 x 3 x 2 x 1
CaptainHyperbole
Thank you! I mean maybe we were taught it but o have no memory of it, I mean this is literally the first time I’ve ever come across it.
factotumjack
It's useful for combinatorics problems like "how many different 5 card poker hands are there" (Answer: 52! / (47! x 5!))
CaptainHyperbole
Is there a ! Button on the TI84? Or do you have to type in 52 x 51 x 50 x 49 x 48 x 47 x 46 x 45 x 44 x 43 x 42 x 41 x 40 x 39 x 38 x 37 1/
CaptainHyperbole
x 36 x 35 x 34 x 33 x 32 x 31 x 30 x 29 x 28 x 27 x 26 x 25 x 24 x 23 x 22 x 21 x 20 x 19 x 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 2/
Frederf
it gets weird when you're asked (3.87)!
ImOPsMom
It's not weird but it gets more complicated (calculus and indefinite integration)
woozle
Hellbat666
Yup... ??♂️
StudioDerpster
"5!" (five factorial) is a shorthand for 5x4x3x2x1
Siq101
I'm in this picture and I don't like it.
Mumalot
it's so obvious... 230-220x0.5 = 230-220x0.5... duh
TsubakiTragic
There are 10 type of people on this planet, those who understand binary....
TheStreetForce
Instructions unclear. Dick caught in ceiling fan. Please advise.
Synaps4
Meanwhile the grammar club is seriously disappointed at your lack of a period after 5!.
Zombieemperor
This requires knowing what a factorial is, seeing as ive only ever run into the term twice in my life i honestly understand not knowing it
Fishkeeper
I have a migraine, so I still don't know what's going on.
ChareAndFlaff
I have a degree in math, use factorials all the time, and I had to come to the comments to figure out what the hell the joke was.
DukeSamuelVimes
I calculated it properly and got the answer straightaway, but took a few seconds to realise the amusement that it would still seem right if
DukeSamuelVimes
someone didn't understand bidmass or factorials.
Zombieemperor
Factorials are useful somewhere? kinda shocking ngl
Sarah1987
Mathematician here. I’m going to share this on my Facebook page so I can pull a fast one on my nerdy friends. It’s a knee slapper for sure!
aloysiuscentauri
I’m going to send it to a friend via fax.
Sarah1987
I sent it to mine using smoke signals. I’ll let you know when get a response.
Frederf
e! = 4.26...
RetrogradeLlama
Actually, you need to use parenthesis, so regardless of the order, people do it correctly and don't crash a $1B lander on Mars.
Paranemec
It crashed because of rounding errors in floating point numbers, not incorrect order of operations.
RedAppleSoda
Thank you! Order of operations is an imperfect solution that isn’t intuitive and leads to needless miscommunication.
APuffOfAirTicklingYourNose
aCtUaLlY, yOu nEeD To rEaLiZe tHaT MuLtIpLiCaTiOn aLwAyS CoMeS BeFoRe sUbTrAcTiOn
SkinnerTBD
I thought that was a unit conversion issue. meters to feet and what have you.
RetrogradeLlama
It was... just an example of what goes wrong when math goes wrong.
Quasime
No, order of operations the answer is 120 or 5!
FiveShiftOne
You do not need to use parentheses, no.
RedAppleSoda
This is an interesting article on the value of parenthesis: https://jaredantrobus.com/misc/pemdas/
FoxyEllie
As a programmer, I use paranthesis excessively because I'm otherwise going to end up confusing myself when I come back later.
FoxyEllie
"wait, does java do this operation first or this one? Fuck it, I'm enforcing this one."
FiveShiftOne
Bro of course they are important. Just not in THIS case.
RedAppleSoda
In THIS case, the joke actually relies on the fact that we all know “order of operations” is going to trip people up. That’s how bad it is.
FiveShiftOne
That's not bad, that's the entire crux of the joke. It's what makes it clever.
Frederf
having value isn't strictly necessary.
RedAppleSoda
AnotherFailedAttemptAtHumor
Anybody else get 120 or am I missing something ???
adrianenspired
5!
VolcanoHerder
I also missed it the first time I saw it and I have an MS in a STEM field and have Engineer in my job title. Don't be too hard on yourself.
hipifreq
It's funny, because he means 5-factorial, which is written as "5!'. 5! = 5*4*3*2*1 = 120
UncleBuckFutter
mattbl
"Funny"
Selekta
There are 10 types of people, those understand binary and those that dont-better joke
hipifreq
There are 2 types of people: those that can extrapolate from incomplete data
Imalwaysready
You're right AND you're missing something.
rkymtnthunder
"5!" Means 5 factorial. Which means 5 x 4 x 3 x 2 x 1. Which equals 120.
Quizz25S
I don't even bother with shit like this. "87% of people get this wrong! Will you!?" Fuck right the hell off.
theyar
That's not really what this is.
Quizz25S
"you probably won't believe it" That's EXACTLY what this is.
theyar
Then you didn't get it.
AnythingMuchShorter
5! = 1*2*3*4*5 but since he wrote that as a sentence, if ! is a symbol there should be a punctuation after it.
theyar
Yeah but since it's a joke and it even declares it as such, the point is to look past the literal and find the trick.
iamAWAKEincaseyouwerewondering
My thought exactly! If you’re going to make punctuation marks important in your meme, then you should be using them correctly.
AnythingMuchShorter
So to use his format properly, if I write 5! that's 120, but not if I write 5! Written like that it's just 5.
RyanHYK
Please Excuse My Dear Aunt Sally.
GerardEngelage
Mijnheer van Dale wacht op antwoord
nat300Lord
Same
thricebakedxyz
Yes, no.
notanoldbitterbetty
I mean, I got at least 12
ThatTransformersDude
Wait, how did you get a number? I got əª
AtmaDarkwolf
er he SHOULD have ended his statement with 'is 5!.' not 'is 5!' cuz the exclamation point (in context of a forum) is end of sentence.
DigiT00l
5! Is different from 5, 5!=5×4×3×2×1=120
MrWigglees
The question is 10 x .5 = 5
MOMOnica97
I got West Dakota as an answer
simonsaysabunchofstuff
I copied this guy
Cranbananarama
West? Oh, my answer was way off.
Camwhoisit
This deserves way more thumbs up ? ? ? ?
HommeDeFeu
Soooo much better than east Nebraska, am I right
ItHappenedInThe20thCentury
I got my dick stuck in something, but it wasn't West Dakota :(
dontfloatmygoat
A mountain momma?
JustJoe2047
Same
madjo
120 is what I got too
adrianenspired
yep, exactly! 5!
madjo
(Which is 5!)
PineappleIsDeliciousOnPizzaFightMe
I don’t know what this factorial malarkey is, but 220*0.5=110 and 230-110 does, indeed, equal 120.
WashOutPfaffenbach
omg, thanks. I couldn't see "x" as "times"...
MadCat221
"5!" means Five Factorial, which means take that number and every integer under it down to 1 and multiply them in sequence.
bilborrax
I thought he was yelling 5
MadCat221
In essence, 5*4*3*2*1... which is indeed 120.
CeterumCenseo
Fun fact: 0! = 1
AnotherFailedAttemptAtHumor
Ah. I didn't see that. so 5x4x3x2 = 120.
Zreen
Technically also x1 but that's redundant so
zanaria
The problem is that ! is called an exclamation mark and is used to indicate something important. Most people that arent into math wont /1
zanaria
understand that it goes with the 5. Now if there were words after the 5! then people might figure it out easier. /2
GingerLaird
So what's the point of factorials?
VaudevillianVeteranCastVicariouslyAsBothVictimAndVillain
Mostly in statistics but looks like it's probably common in other math subjects as well.
bilborrax
Kills a week in middle school math class
Chromentor
Making math jokes.
zerovanity59
The number of way to arrange list a number of n unique items is n!
eemger
Calculating possible combinations.
tavinjer
Oh. Thank you. That actually makes sense.
mbrauen
Plenty of applications, e.g., combinatorics, probability, stats. Mathematicians are lazy so we invent symbols and notation to abbreviate.
dohcohv
5! Is 5 factorial, which is 5x4x3x2x1, which is 120. It's not very common notation.
LilCookieMonster
It's like the only notation I know. I'm european though
theguywiththevoice
I always hated it, though, for co-opting a symbol that is already in use. I didn't learn it at all in high school, but I skipped class lots
Rogerwilco1974
Well ..it's absolutely standard notation, but it's not a very well known one outside of mathsy folk that use it!
SoPoSassquatch
You don't stats much do you
theworldcouldbeflat
Stats use chi square distributions not really combinations and permutations.
dickblack12
5! (five factorial) = 1 x 2 x 3 x 4 x 5 = 120
MrWigglees
Five factorial Is not in the equation.
tlvolga
This is just 120 with extra steps ?
Peepsmith
Thank you for explaining it
blumpk1npie
I didn't learn this in school. Or I did and forgot it
whothehellelseusesTingjidasausername
Ooooooooohhhhhhhhhh.... damn it
GribCake
I’m an engineer and I still think that’s bs lol
skumocomics
ty bb
feryooday
Wow it’s been way too long since maths classes. I’m old and dumb now
nat300Lord
Dammit!! I forgot about that.
thricebakedxyz
Me too - learned that at night school Algebra class.
Flexcalibur
Flexcalibur
take your damn upvote
LaughingInTheFaceOfDanger
The problem with this is while 5! Is correct people who did the math wrong but got the right answer will carry it forward. Sounds familiar..
Grimmrog
so he just was bad at writing because the anwers sentence is missing the "."
FailureFactory
Purposefully.
SealOnLand
Never thought I'd learn math in Imgur. Gotta browse more and hope to get a degree now.
geekykeycap
You absolutely won't learn math on here lol. And most the imgurians saying theyre good at math are just talking about arithmetic.
ManByTechnicality
Are you equal parts pedantic and creative? If so a degree in math may be right for you?!
DaveTheScientist
Oh goddamnit
jimmyman999000
UprootedGrunt
Gets me every time.
MikeTheScientist
Cmon @DaveTheScientist you let’s us men of science down…
DaveTheScientist
I did, and I'm not afraid to admit it. That was smooth
LuminoZero
Don't worry, I'm a STEM guy and I missed that.
DaveTheScientist
Haha me too. The delivery was smooth
Theory89
I have no idea what any of you are talking about
Dumfk
That's backwards! It's 5 × 4 × 3 × 2 × 1
LordofSadFace
Honest question: would that make a difference in a multiplication ooeration?
maincarrot
Neigh. 5x2 = 10. 2x5=10. Times both by 3? Both are 30. It's all being multiplied by the same amount, the order doesn't matter.
kragnus
No, it's called the commutative property (a+b=b+a). + and × are commutative, - and ÷ are not.
AJMansfield
Factorials are only defined on Unique Factorization Domains though, meaning the multiplication is always commutative and any order is valid.
NullNameAvailable
But it's easiest to program recursively starting at n and moving down to the base-case 1
erwinmahatma
IronicDancing
WHY IS EVERYBODY MULTIPLYING BY 1?
GatDangHippies
You have to or it doesn't count.
IronicDancing
FUCK YOU, SIMPLIFICATION IS ALWAYS PREFERABLE.
HasteTheFool
To be fair, if you DO do it, it doesn't matter.
sweetnaivety
why don't you include 0 too then, that would make solving factorials soooo much easier!
IPKOB
Also incomplete if we want to follow it to a T, 5x4x3x2x1x1
stealthgunner385
Why would you have to ×1 twice in total? Nevermind ×1 is an identity property, it should appear only once in a factorial expansion.
IPKOB
Its because the mathematical definition of a factorial is 0! = 1 and N! = N x (N-1)! [note including either of the 1s is pointless]
tirohtar
I think it's to represent that 0! = 1.
APuffOfAirTicklingYourNose
zerovanity59
This is the kind of thing that is, at least historicall, quickly introduced and then dropped for years.
GarrickWhaley
In my Podunk ass high school we never covered factorials.
NothingPrince
It's only done in AUS with the top 5% so most people never see it.
PectorialMuscles
This is not seventh grade math.
saldrSleepTaker
Depends what country and what type of school. I was taught factoris, combinations and permutations in grade 7
PectorialMuscles
I learned them in 7th as well, but most of my counterparts later on learned them in 9th or 10th. I was in a special kids school
NauseousPanda
The poster missed 1st grade litterature. The sentence ends at '!', so what he wrote is that the answer is '5' which is false.
Alfonze423
That was 11th grade for me and I focused on math & science.
welltechnicallyimnotarobot
Hey now I've gone all the way up to multivariable calculus and it still took my dumb ass reading the comments to get the joke.
Grimmrog
no he literally missed the point.
Slayer0026
You changed the math problem by adding the parenthesis. PEMDAS isn’t a rule, it’s a guide. The MDAS is not done in any discernible order. 1
Slayer0026
The only rules is. Parenthesis and then exponents. If you want a particular answer or for it to be solved a certain way, then you use the 2
Slayer0026
Parenthesis to indicate the order. Exceptions are when you have a variable and an internet together, such as 5x. That multiplication will 3
Slayer0026
Be done before any other MDAS operations. 4/4
Slayer0026
Integer* not internet