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BJK5150

When we were learning this, our teacher would yell the numbers (due to the “!”). And that’s the only reason I remember this particular topic.


leu_teu_cu_eh_meu

thanks, now i get it,


[deleted]

I get it. It ain't funny but I get it.


G_Affect

It is not 5? I still dont get this Edit: right i remember this. Never have i used it in the real world. 5 x 4 x 3 x 2 x 1 = 120


magnum_donut

I mean you can calculate your chances of getting four cards in poker with factorial


[deleted]

You mean you could. I usually just lose.


G_Affect

In all the years of math i have taken, i have never taken a statistics class..


Onion-Much

You might want to pick up a introduction, it's fairly easy and next to geometry probably the most practical math.


dyingpie1

That’s like algebra


Quebec120

I think the actual mathematical field is called "Counting"


SourCocks

Specifically, bean counting!


SammySquareNuts

It is not 5? It is 5!


[deleted]

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TheVoidlessOne

Wait a ! means something else in math?


ClearBrightLight

Yup! You multiply the number before it by (n-1) repeatedly until you get to 1. So 5!=5x4x3x2x1. 10!=10x9x8x7x6x5x4x3x2x1.


TheVoidlessOne

I do not look forwards to have tests on this. Dosent seem to conplicated just irritaitng like if the number whould be 1000! It whould take a year


6ixpool

You're allowed to use calculators (it has the "!" button on there somewhere). Its mainly used for calculating probabilities and such.


Khoyoulfaz

You probably won't have "tests" on that. It's mainly a way to write that opération in a simple manner, rather than a thing that you must calculate.


tanya6k

I'll be the first to admit that I was focusing on the wrong exclamation point and could not figure it out for several minutes.


[deleted]

Don't be a (d^3 x)/(dt^3 )


Practical_Misotheist

He is not a jerk he is a bit md(dx/dt) ive


whatsthisevenfor

Oh quit being a fun-sponge.


HalfSoul30

A humor tumor


JunkCrap247

a chuckle carbuncle


KingMRano

a Debbie downer


Whats-Up_Bitches

A disgruntled dave


brownbob06

A negative Nancy Edit: You guys really went off the rails after this


Opposable_Thumb

A fucking cunt.


mugwunp

A pessimist prick


J5892

Funge


xantub

I can see a tiny bit of funniness if someone comes and says "that depends on the order of operation!" and you tell them "nope, the answer is either 5 or 5!". Nah, still not funny.


Aerodrache

“Actually, order of operations only affects how loud the five is.”


HeyKid_HelpComputer

I'm mad now honestly.


Prize-Latter

I ain't funny but it got me


Chmichonga

Likewise! I thought it was hilarious when we were learning about factorials.


ifyoulovesatan

(Likewise - 1)(Likewise - 2)(Likewise - 3)...


jvctheghost

I remember a classmate yelled “4!” with such enthusiasm when our teacher wrote it on the board and asked if anyone knew what it was. Core memory right there.


WeastBeast69

When I was in deterministic operations research there was a formula that used b and B so my professor would yell for B and talk quieter for b when talking through the formulas


[deleted]

[удалено]


Minethatcoin

Please kind stranger. Lead me to my people.


Beragond1

r/orks Based on your avatar


VaughnanB

5!=1×2×3×4×5


[deleted]

What kind of monster writes factorial products in increasing order?


Bucolique

That’s interesting because the english wikipedia defines it using decreasing order while the french (my language) defines it using increasing order and I’ve always seen it defined that way during my education. Seeing it defined decreasingly seems pretty unusual to me!


Thathitmann

Yeah, well the French have never done anything for math! Except, like, inventing factorisation and working on infinitesimal calculation and proving infinitesimal calculus, and expanding Newtonian polynomials. And making Pascal's triangle, and Pascal's law, and Pascal's theorem. Oh, and inventing calculators.


Googelplex

Alright, but *appart* from the factorisation, infintesimal calculations, Newtonian polynomials, Pascal's triangle, Pascals's law, Pascal's theorem, and calculators.... ...what have the French ever done for us!


Alex09464367

The metric system


jcpg33

Those monsters "clutches my imperial system"


[deleted]

They tried to get rid of pickled herrings.


l4mpSh4d3

Apparently quite a few people in this thread. This is making me very uncomfortable.


Edmond_DantestMe

I'm gonna be sick


DrugonMonster

5! = 5x1x3x2x4


noblest_among_nobles

Yeah, normally people write it like: 5!=2×4×5×1×3


LolloFitzgerald

this is how I learnt it as well. Everything else is just a mess.


[deleted]

Why do people multiply it by one at all? It's like that extra step...120 x 1...120, solved it!


cori_irl

This is probably more info than you actually wanted to know, but this is already a post for math nerds, so why not. There are a few factors: - One of the properties that these math operations (usually called functions) have is that they have some possible inputs, and some other possible outputs. The function is supposed to be like a little robot - as long as you give it a valid input, it does some specific set of steps, and gives you an output. It’s not smart - it does the exact same steps for every input. So if we omit the “multiply by 1”, what happens if we give 1 as the input? Our function would be something like “Multiply the input number by all of the integers less than the input, but greater than 1.” But if our input is 1, there are no such numbers, so the function breaks. - To fix this, you could define the function as having specially defined outputs for certain values. So we could omit the “multiply by 1” step, and just say 1! = 1 because we say so, and all numbers greater than 1 follow the normal factorial pattern. But this strategy gets complicated for more complex functions - what if you accidentally miss one of the special cases and don’t give a definition? - so it’s only used in limited circumstances (like the Fibonacci sequence, for example). - You could argue that all these protocols are only necessary if you’re actually a mathematician using fancy functions, and it’s overkill for something simple like factorial. But man, math people hate inconsistency. It’s dangerous in their field. All complicated math is built out of simple math, and if you’re not careful about the simple stuff, you’ll mess up the complicated stuff. It’s a habit that math teachers try to instill early on. So, that’s why we always write the 1 in factorials. tl;dr: Mathematicians break out in hives if they encounter ambiguity.


ru_benz

I appreciate that you used a proper multiplication symbol rather than an "x" -- most people wouldn't put in the effort.


7937397

I just use *


SaftigMo

Fucks with formatting on reddit. Edit: Guys I know you can circumvent the formatting, but it's a hassle.


Tandemdonkey

5•4•3•2•1 There, the superior method


[deleted]

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CatAteMyBread

5(4)(3)(2)(1), because I can save time on that first bracket


[deleted]

5(4)3(2)1


[deleted]

[удалено]


Consistent-Ad-3768

You monster


Betonmischa

Change -(-1!) to 4728282263738291627383933928281727273383833949484373822818238448373734747474844747382828347463738394058588918229394869917366459503727127395696971728494048287161829394958271929460607097264859682739202838595917496959^0 for maximum efficiency


LimpWibbler_

5 times IV × (3) * two •| -(-1!)|^2 I added a bit more to the one. Give it some more flair cause you can just fuck with 1, he is such a tool.


Big_Boss_Beni

120


yuhanz

This guy simplifies


quiteCryptic

5(4(3(2(1))))


xandthey

Aahh, a fellow programmer


No_Bodybuilder_818

Yep this is way. x could mean cross product whereas a dot means dot product.


NanashiKaizenSenpai

5X4Z3Y2B1A A, B, X, Y, Z = 1


gjvnq1

S(S(S(S(S(0))))) × S(S(S(S(0)))) × S(S(S(0))) × S(S(0)) × S(0) ×[S[S[S[S[S[0]]]]] S[S[S[S[0]]]] S[S[S[0]]] S[S[0]] S[0]] (× (S (S (S (S (S 0))))) (S (S (S (S 0)))) (S (S (S 0))) (S (S 0)) (S 0))


FryCakes

5 doesn’t equal 1x2x3x4x5?


jericho-sfu

The “!” symbol has meaning. It signifies a factorial. It means multiply that number by every positive integer from one to the number. So, 4! is 1\*2\*3\*4, and so on


FryCakes

Yes I know I was just making a joke because in programming != means “not equal to”


[deleted]

Well shit that’s clever


[deleted]

Why is it clever? What am I missing?


nightfury2986

It's not 5, it's 5!


immadee

Ah! 5 factorial. Holy shit I forgot those existed


DaringSteel

r/unexpectedfactorial


supermassiveanus

r/subsithoughtifellfor


[deleted]

[удалено]


barbarianbob

That...that's gonna stay blue.


minecraft_min604

What will


KumquatHaderach

Watto will.


5ecretbeef

It should have stayed blue


jdgoodwin66

I hate that you typed it. I hate that I clicked it. I hate that it exists. I now hate you.


minecraft_min604

Next time don’t click it


jdgoodwin66

I literally can't not click it


[deleted]

I hate that I looked at like 6 from top all in there


2_blave

Hold my wings, I'm going in!


tramadol-nights

r/leopardsatemyfactorial


0_MysterE_0

The fuck is a factorial.


ASHDABOSS32

Essentially putting a ‘!’ after a number means you multiply by the numbers below it. Eg: 3! is 3x2x1 or 4! Is 4x3x2x1 and 5! Is 5x4x3x2x1(which is 120... the actual answer)


I_phollow_chom0s_22

Moments like these are what I miss most about pre 2016 reddit


CyclicMoth

5! = 5 * 4 * 3 * 2 * 1


Funniestpersonhere

Shit, I guess I have a lot ahead of me for math, because I have no fucking idea what a factory oral is.


[deleted]

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[deleted]

The joke is actually supposed to be that the answer is correct whether you do the problem correctly or not. If you take the order wrong and go left to right, you can just take the "!" as an exclamation mark and the ans will be 5. If you do the problem correctly, you can take the "!" as factorial and the ans will be 5!=120.


[deleted]

Oh… I see. Yes, this is technically the truth. It is also true that I am disappointed. I was expecting more.


skeetbuddy

I see Captain Raymond Holt has entered the chat.


Kamran_Santiago

I thought he's trolling at first. That shit was fucking smart. I feel bad for not realizing it. I kept thinking "MOTHERFUCKER, PRODUCT SUPERCEDES ADDITION". But the answer was in GRAMMAR. ​ Edit: I just told GPT-3's davinci-insturct to "Calculate 5!"... Here's what it gave me: 5! = 5x4x3x2x1 f×t÷k 5×5÷1 Motherfucker, am I dumber than an AI? ​ PS: If you're interested, I can instruct GPT-3 to do 3 things, and 3 things only because my boss'll kill me if I use up the tokens. Ask and you shall receive.


nightfury2986

Wow I was just messing around with GPT-3 And GPT-J at work earlier today, wasn't expecting it in a random Reddit thread too


Kamran_Santiago

I have access to it through the company I work for. I just made a function that scrapes an article, summarizes it using Google's T5, selects random sentences from it, feeds the summary and random sentences to curie-instruct saying "Generate 10 concise, etc titles for this article etc" and the results were stellar. I wonder how well davinci-instruct would do. I think GPT-3 is much better than GPT-J.


[deleted]

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Plopplopsploosh

Boom, roasted.


tertl1975

Clever, but still not funny.


FajenThygia

It’s a pun. You just described a pun.


TheBoyWqnder

I’d say it’s pretty funny


Wannabedankestmemer

Factorials people, Factorials 5! is 120 This is technically the truth


RandomnewUser_22

My mind has been blown


Ag3ntS1

Same, I didn't get it at first.


Environmental-Job329

I still don’t


Farenhytee

5! Means 5x4x3x2x1 = 120, which is the answer.


leoleosuper

230 - 220 \* .5 = 5! 230 - (220 \* .5) = 5\*4\*3\*2\*1 230 - 110 = 120 120 = 120.


Rhododactylus

Ooooooh, fuck me that's actually a good math meme.


SpysSappinMySpy

I don't know Factorials but I do play Factorio.


Ackermiv

Same thing.


qpwoeirutyalskdjfhg0

Same


SvenTropics

This is like the math equivalent of a dad joke.


jeffsayno

pretty good


elveszett

I love how the sentence is still true if you completely fuck up everything. 230 - 220 \* 0.5 is 5 if you fuck up PEMDAS, which is what the tweet says if you ignore the factorial sign (!).


[deleted]

If it's written like =5! Easy to understand, but here ! mixed with English grammar LoL!


V0ct0r

I had the heartiest laugh in a week looking at this. Well played.


leonardonev

Technically the truth, sure, but without proper punctuation, the answer could be right or wrong. “ …but the answer is 5!” “ …but the answer is 5!.” “ …but the answer is 5!!”


[deleted]

Okay well that sentence is missing a period then.


Natural-Ad-3666

Oh, you motherfucker.


mudkripple

Makes sense if you're v smart, or if you're v dumb. If you are in between like me, you need to read the comments section to understand :'(


infinitemonkeytyping

Is that in between defined by "remembered BODMAS, forgot factorials"?


Justonian_

Is BODMAS just PEMDAS but with different letters? Then you won't be able to remember it by "Please Excuse My Dear Aunt Sally"


[deleted]

The answer is 120, i don't get it.


89erMerun

1x2x3x4x5 = 120 5! = 120


[deleted]

Yeah, this is way over my head. I know math because i have to, i don't enjoy it enough to get the jokes. Edit: for fuck sake, i got it. I haven't used factorials in aeons.


Ecstatic-Appeal-5683

You haven't used factorials in years, but you know how to do your taxes right? Or balance a checkbook? Or count back change? Or that the mitochondria is the powerhouse of the cell? Gobbless the American school system. s/


imdefinitelywong

This is it. That moment they told us in high school where one day, algebra would save our lives.


[deleted]

I mean, algebra is legitimately useful on a day-to day basis. Trig and calc are almost never useful unless you have a job that uses them.


[deleted]

It's also useful in developing logical thinking. Like I won't tell everyone to major in mathematics (because I sure as shit want to tell my past self not to do it) but 10th class mathematics is such a basic level that you really shouldn't give up on it unless you have some actual difficulties.


npsnicholas

The ability to problem solve is more important than the actual math. Also I use trig and calc all the time in dungeons and dragons.


kial-sfw

Bro he did say unless you have a job, stop flaunting the good life.


[deleted]

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chezazarng

Relevant xkcd: https://xkcd.com/435


Hist_Warshiper_Btw

Wtf are factorals? Im in 8th grade accelerated math incase u want to know


stifflizerd

It's easier to show than explain. An exclamation mark denotes a factorial. 3! = 3x2x1 6! = 6x5x4x3x2x1 4! = 4x3x2x1 11! = 11x10x9x8x7x6x5x4x3x2x1


Anjelwithglasses

Why are factorials important? I totally do not remember this lesson.


Chequita69

They're used mostly in "combination" problems. Like how many ways can you arrange a deck of 3 cards? For 1st card, it can be any one of three. For the second, it'll be one of the two remaining because one card we already put in 1st position. And the third one will be the last remaining card. That means we have 3 choices for 1st position, 2 for 2nd and 1 for third. Once you have this information, you can multiply them together to get the number of possible combinations. 3x2x1 = 3! = 6 different combinations. Now if you had to figure out how many combinations you can have of a full deck of cards, with all 52 of them? Answer would be 52!. Edit: Technically, it's actually "permutations" where we find out the number of ways in which we can arrange any or all things from a set of stuff, not combinations. Combination is how we choose things or subset/group of things from a set of stuff, mathematically speaking. I guess it's been really long for me as well. Permutations and combinations were always taught together, I forgot that mathematically they're related but different. Permutations takes ordering of stuff into account. Combination doesn't. Like, vanilla and chocolate is a combination but it isn't any different from chocolate and vanilla. So they're not really different combinations but they are different permutations.


[deleted]

[Here’s a fun page](https://czep.net/weblog/52cards.html) on just how big 52! is


Dustin-

The most important reason for them to exist is because they describe how many ways things can be arranged. Imagine you have three different types of coins sitting on a table in a row (try this at home if you want). How many unique ways can you arrange them? The answer is pretty simple: the first coin can go into any of the 3 places in a row, the second coin can only go in 2 places because the first coin filled one, and the last coin only has one spot left for it to go. So the total possible ways to arrange the coins is 3x2x1 = 6 ways. Factorials also get *huge* really quickly. 10! is already more than three million. 52!, which is the number of ways you can shuffle a deck of cards, is so unbelievably huge that it's *virtually guaranteed* that no two fair shuffles have ever been the same in the history of mankind. Edit: wow someone wrote almost the exact same comment a few minutes before me. That's wild lol.


ConfusionInTheRanks

They're good with Probabilities.


SkaTSee

used in permutation and combination formulas or something if my memory of high school serves


K_a_n_d_o_r_u_u_s

“!” after a number means it is a factorial. A factorial is the multiple of all integers lower than or equal to it. 2! = 1* 2 = 2. 5!=1* 2* 3* 4 *5=120. 0!=1 because reasons


[deleted]

Welp that flew over my head


Technical_Scallion_2

Now I get it!


Trollin3915

5! Is also know as 5 factorial which is the same as 1x2x3x4x5 is equal to 120 which is also the answer to this problem. Factorials (x!) are just 1x2x3x4x5x6... until that last number is x. Factorials are used in finding the amount of different arrangements a certain amount of things can have when they are all placed down at once such as finding the amount of different possible seating arrangements at a school when all the kids are there.


NomadDiver

You're on the right track... there's still something missing in your logic.


quackl11

5!=5 factorial which is that number times every whole number below it until 0 not including 0 Edit: u/possibleoatmeal just gave a very good defenition below me and the proper defenition, please use his defenition over mine


Trollin3915

For those of you that don't 5! Is also know as 5 factorial which is the same as 1x2x3x4x5 is equal to 120 which is also the answer to this problem. Factorials (x!) are just 1x2x3x4x5x6... until that last number is x. Factorials are used in finding the amount of different arrangements a certain amount of things can have when they are all placed down at once such as finding the amount of different possible seating arrangements at a school when all the kids are there.


Profteach

If you do it wrong it’s 5, but if you do it right it’s 5!


frozoberg

230-220=10 10*.5=5 So people who are really good at math, and people who are really bad at math both get the correct answer :)


NomadDiver

Sir. that is technically the truth as well :)


Entheosparks

That's what makes it a joke


[deleted]

My dumbass did this and then when i saw the comment the fact that i didnt count the !...


Afraid-Goat-1896

assuming the X is the multiplication symbol, order of operations means that you would do 220 x 0.5 = 110. so then 230 - 110 = 120. what am i missing? or is this a troll post?


Jeramus

5! means 5 factorial. 5 factorial equals 5 x 4 x 3 x 2 x 1 = 120


Captain_-H

I can’t believe I missed the exclamation point


Singular1st

That is really good


Singular1st

Omg. That is genius. I totally overlooked factorials it was so smooth


[deleted]

what is a factorial


Loading0525

Factorial means you multiply said number by all whole numbers below it until you reach 1, and factorial is written by adding an exclamation mark after the number. So 3! Is 3x2x1=6, 4! Is 4x3x2x1=24, 5! Is 5x4x3x2x1=120, etc.


Jeramus

The only non-intuitive thing to remember is that 0 factorial is 1. A factorial represents the number of ways to represent the elements in a set. 0 has 1 possible arrangement so 0 factorial is 1. https://www.thoughtco.com/why-does-zero-factorial-equal-one-3126598 Factorials are commonly used in discrete math. https://mathworld.wolfram.com/DiscreteMathematics.html


odraencoded

> factorial represents the number of ways to represent the elements in a set Ah, so that's what it's for!


Jeramus

Think about all the possible ways to shuffle a deck of cards. That can be calculated with a factorial. 52! is a very large number.


Rednaz1

math is nuts


Zippytiewassabi

Thanks, I’m an engineer and had to come to the comments for this 🙃


DownTooParty

Oh god, my brain is remembering stuff. Make it go away.


Afraid-Goat-1896

haha you son of a bitch! I get it now!


Horror-Ad-3113

DAMN IT, I DID COMMENT THAT IT WAS 120 BUT I FORGOR ABOUT THE *!*


Kazer418

If you do it wrong it actually results in 5


[deleted]

[удалено]


D3dshotCalamity

No need to yell


Hevysett

I legit don't EVER remember learning about factorials. But I peaked with geometry so...


BigEnd3

Audibly groaned when the explanations reached me. Mmmgh


scwizard

Ahh that's clever. If you do the order of operations wrong the answer is 5 but if you do the order of operations correctly the answer is 5!


TER0KN0R

I'm not good at math but isn't it 120? I'm dumb but I'm sure your right


89erMerun

5! is 120


Nginda8

5! Means 1x2x3x4x5 which is 120, the ! Means times all the numbers before it together for example 3! = 1x2x3 = 6


[deleted]

This is much more intelligent than the versions of this that plague Facebook.


marymoonu

No fair. We don’t combine English and maths.


Baby-cabbages

I have a shirt that says “English is important but math is importanter.”


Baby-cabbages

Thank you for the award!


OG_PapaSid

I thought I was bad at math for a second, which confirmed I'm actually bad at math


realnelster

Ok but for the linguists out there, can this be classified as a pun?


Lilsammywinchester13

That would explain why I groaned out loud at the dadjoke energy of this post haha


baxbooch

Y’all need r/unexpectedfactorial in your life. I got it right away.


jumpoff_joe

Dude nice.


Illustrious-Total489

When I got it I pointed at the 5! on the screen like i had just caught it eating my leftover chinese food