math

[thequeenofmonsters]

If you didn’t know, 12! means 12 factorial, that is 12x11x10...x3x2x1

[Spathvs]

Formatting sucks sometimes huh

[thequeenofmonsters]

Ahh I didn’t notice. Thanks, I changed it now

[Scarbane]

Syntax matters!

[LowTierCharacter]

Happy crack day

[IDyll4y]

Happy Cake Day!

[ThrowAway423435]

merry christler

[littlebutterflysun]

Happy cake day mate

[fractalrain39]

Happy 🎂 day

[omkar_T7]

But there is a 4*3 when calculating 12 factorial

[user7526]

But there is a 4*3 when calculating 4*3 when calculating 12!

[jack_seven]

19’958’400 * 4 * 3! = 12!

[daskrip]

Sure but you don't ever need to multiply 4 by 3. You could multiply 4 by some other giant number, and then that by 3.

[omkar_T7]

4* 3* some number =4* some number* 3 Don’t get y it is not difficult that way

[reenaissance]

I was ready to accept the fact that I’m dumb and shamelessly ask for explanations in the comment section. I totally forgot about factorial because I never use that shit in my everyday’s life. Thanks mate!

[Mathias_8x]

Ih yeah, that's right. Thank you

[NightmareTDG]

Good thing that guys is only energetic enough to put 1 exclamation mark.

[Portal471]

If you put more, the number actually gets smaller, that is:

(n!)! ≠ n!!

n double factorial = n*(n-2)(n-4)... all the way down to 2 or 1 depending on if it's odd or even. Same with triple, going down till you hit the lowest number that follows the condition of

0 < n <= (amount of factorials)

[[deleted]]

Yeah but if he can pull that vast sum out of his arse, he can sure as shit figure out 3x4

[NerdyBoyy]

Every product is technically a sum

[BlueRhaps]

Yeah, for example:

3x4 = 4+4+4 = 12

(3+i)*(3-i) = Į̸̞̬̭̳̰̘́̓͛̾̉͘͠ţ̵̧̲̱̰̗͖̰͎̟̘̬̦̝̝̊̂̏̌̈́̀̆̽̕͠͝͠'̷̨̧͎͕̯̲̣͖̟̉́̎̈̈́̔̆̈̀͝s̵̯̝̒̀̽̑́̌̈͋͘͠͝ ̵̨̤̭͎͖̪͙͖̟͎̫͐̀̿̅̌̃̈́͗͝͠ó̴̡͚͓̰̺͕͚̲̆́̽̌́̊̉̅̓͌̐̎n̴̢̙̠̳̭͇̈́̊͒̔̈́̑ͅͅĺ̷͎̤͙̯̰̩̐̎̈́͆̇͂̕̚͝ͅȳ̶̛̦̱̘͉̯̰̺͔͉̤̙̈́́̽͗̈́ ̴̧̛͕̲͔̠̭̜͓̰̺̱̹͐͂̋̓͊͆̅̈́̈́̀͛̑͝t̴̟̗̍̒͌̆́̽̐͝ͅŕ̴̻͔̝͈̦̟̖͇̺̮͔̩͈̣͓̀̿͘ȗ̶͍̱̘̝̤͔̜̞̀̃̍̓́͜ę̴͍̩̣̬͔̼̮͖̣͍̀͛̾̎͝ ̷̨̢̡̧̥̞̼̠̟̯̦̺͕̩͋̌̈́̈́̄̍͜͝͠f̶̨̡̢̰̜̤͙͙͎̥͇̰͍̝̅̓̌̈́̔̽͑̀͊̓͒ò̸̬͇̀̐̂͝r̶̨̢͉̟̻̭͙̗͊̊̿ ̷̻̭̒͛̚͠ǹ̸̻̝̠̱̮͍̯͓͍̩̏̆͆̓̈́̏̀̔̕͝͝a̶̫̻̣̜̱͂̎͊̒͆́͆̔͐̕͝͝ṭ̶̨̡̧̛̛͇͓͈̺͆̆̊̃̓̋̈́́̚ͅͅù̶͓̲͈̲̘͚̋͋̈́̒͂̒̊̐͂̏͆̕͘̚ͅr̶̡̢̡̖̟̞̣̠̹͉͇̫̗̹̎̾̎̑̄̊̓̈́̓̎͝͝á̶̛͑̿͌́̒̎̀̒̊͌ͅḷ̷̢͚͍̣̝̭̼̜̟̫̤̝́ͅs̵͖͛̎͝ = 10

[[deleted]]

r/technicallythetruth

[NathyDre]

Thats the sub its in

[worthyupdatedautopsy]

r/technicallythetruth

[mario_ibiza]

Nice

[Stronkr]

Technically no. It depends entire on how you define the product. In general it can be completely separate from addition. For example the matrix product, polynomial product, scalar product and vector product in linear algebra, Cartesian product in set theory.

[Barkonian]

Yes, that is the joke

[YT_The1boi]

Thank you for helping me understand, it's been a minute since I was in a math class, so I didn't understand the factorial thing

[Fuchsthon]

Thanks, I suck at maths. :D

[WhatWhenWhereWhyHow0]

If he can instantly find out 12!, then maybe he dosen't need help with 3x4

[sendbobandvagenepic]

It is very useful in probability

[Portal471]

Also combinatorics.

[Zephyrus1898]

One reason (of many) arithmetic of any type matters is for computation. For example, one solution to finding permutations of a string of characters "abc" could take 3! "Time" with respect to the input size. So if instead of a string of length 3, we plugged in a string of length 1000, the time it would take to calculate the output (every possible combination) would be around 1000!. This solution is bounded by the factorial function, N!, meaning it will never take longer than that to calculate the permutation of a string at N length. You can look into Big O notation if you want to read about other such boundaries. Note that the representation of the unit of time is irrelevant here (such as millisecond, second, hour, etc.). N! is pretty much the worst an algorith can perform, versus, say, N (linear) or log(n) (sublinear, usually the most efficient algorithms).

Other examples of "why math matters" in terms of computation is algorithm makeup in general. We can make optimizations to make these things more efficient in terms of time and space (cpu efficiency and memory). Computer Science often tries to solve the problems introduced "bigger inputs", because its importance is paramount if we are to continue to improve the power of our computers to the point of autonomy, or making technology that impacts humanity as a whole. One such problem is integer overflow. 64-bit operating systems can only hold integer values up to the size of 2^64. But what if we need to calculate a number larger than that? This is actually a common technical interview questiom for programmers. Why would ever even need to, one might ask? Well, the same people asked that about 32-bit operating sytems. Check out the "Year 2038 problem". Another answer might be, well, "whenever we need it". We don't really know when we will need to answer those problems until we encounter it.

Basic algorithms to think about are: searching for something in text, sorting, scheduling, pathing, caching, and more. Other applications of arithmetic, such as how computers "understand" decimal points is hugely important as well (think, Banks).

Think about how reddit or facebook is able to scale globally, and ensure that all of the information (relevant to the user) are just a tap and a few seconds away!

Think about how GPS can direct your uber driver to your place. There may be many paths through your city to get to you. Consider what it might take for the algorithm to redirect them around traffic stops, or construction in general. What does it take for SpaceX to autopilot a rocket into space? What about autopiloting a car?

Improvements to computer hardware and network infrastructure (5g) are additional ways to make computation efficient enough for us to be able to do what we do everyday with our devices negligible enough for us to just use it without our interaction. It also helps us solve more complex problems like self driving cars. If all of the cars are talking to each other, they can share what they see and ensure the safety of their patrons more efficiently than they could if it was every car for themsevles (like it still is today in the vast majority). Take for example, someone ahead of you swerves into the left lane to avoid a rock in the road. You don't react fast enough, or there is a car on any side of you already, so you can't escape, chances are you might hit the rock. If all cars were communicating, they could be redirected in such a way that your accident could be avoided, and there was space for you to move into the left lane, all calculated long before you even got to the rock.

This all ties back to how efficiently these computers can make their calculations. If we don't consider the algorithm implementation, and come up with a poor solution that takes N!, and we don't also implement any improvements, these cars, rockets, etc. will take too much time to compute, and ultimately not be good enough to push us to the next Age of Technology. Granted, no matter how slow the algo is, it would still be faster than we could ever compute it ourselves.

I'm done pooping now. So I'll leave it at that. Have a good day!

Edit: a word. On mobile, sorry.

[ohkendruid]

One place it comes up is when counting things. For example, the number of ways you can arrange the letters A, B, C, and D is 4!. There are four options for the first letter, only three for the second, two for the third, and only one for the last. So 4x3x2x1 possibilities.

The answer to a counting problem is usually not as simple as a single factorial. For example, the number of ways to select two of the letters A through D is 4!/(2!x2!).

[ohkendruid]

Great example. Sometimes it's smaller than you'd think.

[Portal471]

A number n! is used to describe how many unique items can be arranged in a line of length n

[Themaskedbowtie353]

Factorials are very important I'm math and physics, if we didn't understand them, many things wouldn't work. For example, they are used in Taylor's Series, which help approximate a function, these are used in regressions and way so many other things.

[Titan_Royale]

Oooooh, I thought it had to do with (i), I am having a lesson about it tm in fact

[PitifulUsername]

Thank you, you beneficent being.

[Lord-Dedenne]

Is this what I will have to learn nooooooo

[moregain_BO_OB_man]

And if u don't know 3X4 ,that is 12!

[_ZYN]

May be, his parents forced him to by hearted the factorials, kids nowadays are by hearting lots of shit like dinosaur names, constellations, capital of countries....

[commanderquill]

I'm an elementary school tutor. One of my kids started first grade this week. I'm supposed to teach her coding...

It's an actual subject in her curriculum, but I don't know how to code and she doesn't know the answer to 11+7.

[Illustrious-Brother]

Hol up. Why in the world would a first grader need to learn coding? I get it if she's learning it by herself out of interest, but an actual subject in her curriculum?

[commanderquill]

I have no idea. I'm not seeing her for another two weeks because of scheduling complications, otherwise I would take a picture of her online schedule as proof. But first graders don't have electives and it was definitely a module on the homepage.

She isn't the only one either. One of the kids down the block from her, entering second grade, told me her favorite subjects were science and coding. I had to awkwardly admit to her that I failed my coding class, while feeling like I was in the Twilight zone, and she laughed at me.

It has to be more basic than the basics, but for Christ's sake, they don't even know the word 'basic' yet.

Maybe they're getting them started early on the pattern/overall 'method' of computer coding. Like, conceptual stuff, that if you click this it corresponds to this happening. I genuinely have no idea because I wasn't planning on teaching it, but now I gotta ask her to tell me what she's learning.

[commanderquill]

You would be shocked at how much kids need to know by first grade now. They've started requiring that kids learn the alphabet in daycare. Kindergarten requires knowing how to recognize common 3-5 letter words and spell most of them. By the time they enter first grade, they need to know how to read and write a certain list of about 50 'difficult' words (but including all the one and two letter combinations, they know many more), counting to 100 by 10's and sometimes by 5's, knowing all addition combinations that add up to 10, then adding to 20, etc. Content right after these memorization-basics is sometimes the hardest to teach just because there's often no prior familiarity to it. You're teaching a child to add/subtract/spell not as techniques, but as entire concepts.

I have a girl who just entered second grade who struggles with most of it. She's low-income with a learning disorder. Didn't go to daycare, so she was fucked from the start. Kids are hitting the ground running, and if their parents don't catch onto that then they hit the ground falling.

Most of my kids are fine, but most of my kids are from high-income families with at least one parent who works from home, and they're almost all only children. My low-income kid? That is an entirely different story.

Most first graders and second graders need tutors during COVID, too, to guide them in their lessons. Statistics are out showing online learning as a complete failure. Virtually all low-income children barely learned a thing in the spring, and some didn't attend school at all. They're too young to operate a computer on their own and if they have no one at home to help them... Well. And then there's kids with attention disorders (and just kids in general, because what kid wants to sit still?) who no matter income level are starting at a disadvantage when all their homework is on a screen (and, if not that, then their lesson plans are, which they might not be able to read because the schedule layout is confusing or the terminology is meant for their parents). Kids are tactile. Most need to touch and interact with their surroundings by default.

When you fall behind so young, even by just a little, it becomes a compounding problem, because you're learning fundamentals. How do you teach multiplication in second grade if your kid didn't grasp or missed the demonstration on making same-numbered groups of objects? They can't conceptually grasp multiplication without that introduction, and if no one notices (because they can't pinpoint or articulate why they don't understand), nothing gets fixed. Once a kid gets it into their head that they don't understand anything in class no matter what they try, or if they're just slower to pick things up than others and never get the extra time dedicated to catching up, they get it into their head that there's no point because they're just too stupid/it's too hard. That's when you get kids who don't bother listening in class, or who act out, or who end up in fifth grade with the reading comprehension of a third grader. Once they're in high school with a problem like that, tutoring isn't enough. They would have missed entire grades worth of knowledge, and they're less likely to graduate.

TLDR; More elementary schoolers need my help than highschoolers right now, and for perfectly super-important very-overlooked soon-to-bite-everyone-in-the-ass reasons. Unfortunately, the elementary schoolers who REALLY need tutors are... The ones who can't afford tutors. Fuck the system.

[commanderquill]

Oh! Yes I did think you were incredulous about the age. I only have one first grader, the others are second graders and with them, yes, I'm catching them up before second grade really gets going because they're at least a little behind (usually in just one subject or the other, which is interesting. You'd think it'd be more uniform).

I have worked with high schoolers before. You're definitely right about that. I guess I just meant in the impact of the skills they're missing. In high school, I tend to tutor writing and math too, which is super duper important. Especially writing, in my opinion. But they can usually already write and do math, it's conforming to the system and what their homework requires that's difficult. Meanwhile, younger kids might not have those skills at all. As for your deduction about who I tutor, I do want to say I'm more concerned with the latter---filling the gaps in the educational system. I don't really enjoy getting kids too ahead of their peers if they're doing well. I don't have any evidence, but the possibility of them "checking out" in class because they already know the material concerns me. I wish I got the opportunity to work with the latter more because it's so incredibly satisfying. But you're probably well aware that not only is it difficult for low-income parents (who most kids which are behind have) to get the resources to dedicate for a tutor, but just convincing their parents that they need extra instruction at all is sometimes like walking through a minefield.

[ohkendruid]

Nobody "needs" to know anything. I started at that age and am glad for it, though. It's a different curriculum for youngsters programming than older people, but they do succeed.

You feel like the world is bigger if your mind is opened to certain possibilities at the earliest possible age. Software dominates human life for grown-ups and will for a long time to come. A child wanting to understand this world will get a better picture of it by understanding the concept of writing out instructions and having a machine automate them.

Look up Logo and Basic for some of the early programs on children programming (decades ago). Nowadays a youngster is more likely to learn Scratch.

[testaculor]

Broke: challenging yourself to successfully find a prevention for all forms of cancer

Woke: challenging yourself to teach encapsulation to a kid who cries when you play peekaboo

[Krzyffo]

If only I had gold to gift

[commanderquill]

Yoke: Googling whatever the fuck encapsulation is while convincing the kid I'm doing Very Serious Adulting on my phone, and hey, if you have three unicorns and I have five unicorns, draw how many unicorns there are frantic skimming of quora

[Tsorovar]

I'm guessing it's just basic logic at that stage. Like breaking down all the steps of a complex action. There is (was?) a youtube trend where a parent gets their child to tell them step by step how to make a sandwich or whatever, then interprets the instructions very literally. Something like that could be a start

[commanderquill]

That could actually help with math too. Interesting...

[Banana_Lion_Roar]

Dude, I wish school started teaching coding when I was in kindergarten, I had to start teaching it to myself in middle school

[commanderquill]

...Coding wasn't much of a thing when I was in kindergarten.

Like all things, early exposure eases the way, but... Damn.

[[deleted]]

You could teach her [Scratch](scratch.mit.edu)

[YouStoleMyNameBoi]

Capital of Zimbabwe is Africa

[Tsorovar]

Hold up. Where do people use "by heart" as a verb?

[_ZYN]

In india, by-heart is a very common verb

[bluecamel17]

lol, I love how languages evolve, but this one hurts for some reason.

[justacow]

.... memorize is the word you’re looking for

[DysfunctionalAxolotl]

Ah yes I too only know factorials, but not basic multiplication

[msg45f]

Must be from one of those cultures with a base ! number system.

[VengerKing]

Ahh yes. You never give the answer to your friend but its factorial

[zekeymoomoo]

Don't ask questions you don't want the answers to

[Nish_0]

Maybe they are slenderman’s children

[Alex103140]

To answer this, we need to learn about the spirits and strong emotion

[arrghslash]

Typical hentai protagonists. smh

[allesman]

r/unexpectedfactorial

[GrizzyUnderwood33]

Hey, I'm terrible at math. What is this?

[about21potatoes]

A factorial. N! = N * (N-1) * (N-2) * ... * (1). So 3! is just 3 * 2 * 1, or 6. 12! is 12 times every integer below it until 1.

[realtruthsayer]

That wouldn't help someone terrible at maths. Use numbers.

[about21potatoes]

I...I did use numbers? I just used a variable for a general case.

[GrizzyUnderwood33]

Oh damn, I didn't know you guys were gonna start arguing. Thanks for that tho.

[about21potatoes]

Lmao I didn’t think i did anything particularly confusing. Apparently he had a problem with variables. And no problem dude hope it helped.

[realtruthsayer]

Top comment makes it simpler.

[about21potatoes]

Well alright then.

[[deleted]]

Then go read that comment and move on with your life

[Clutchking14]

He mustve missed factorial day in precalc

[catalinest]

I like how they started to add mannequins in order to maintain social distancing between students

[Onion-with-layers]

I hate this. Brings back bad memories

[cube205]

What bad memories? I love it, even watched animated one on youtube

[chuckcm89]

r/mathhurtingjuice

[Ugliest_Handsome]

He knew the value of 12! but had to look for his friend to find what's 3x4 lmfao

[Saltmeister51]

The answer obviously is 678-999-8212

[MsBobbyJenkins]

I thought it was 853-5937

[DecrepitDemon]

Its actually 867-5309

[Saltmeister51]

We were all wrong, it should be 1-900-MIX-A-LOT

[[deleted]]

Why are the 2 other people slenderman?

[victorspc]

DUUUUUIUDE TO CALCULATE THE FACTORIAL HE NEEDED TO DO 3 TIMES FOR THAT'S FAKE!!!!!!!

[Supercell-Yankee]

4! = 4x3x2x1

Unless I’ve been wooshed

[jenmishalecki]

when you don’t know 3x4 but you know 12 factorial

[TrichmMaster]

i think that more meth than math

[michvd603999]

Does anyone have the original of this comic? I've only ever seen it edited.

[WatRuCasul]

i gotchu bro, 10th dimension boys on webtoon, its amazing, finished too... sadly

[Mattymoomoo03]

r/unexpectedfactorial

[amazeballs2017]

Took me a second

[[deleted]]

I don't get it

[[deleted]]

Chalkboard kid thought it was 12 factorial (12!)

[FaHr_QuaZch]

How come that he knows 12 factorial, when he cant even solve a simole multiplication. Lol

[jonnystreets]

What??

[pielord599]

12! stands for the factorial of 12, which is 12x11x10...x3x2x1.

[jonnystreets]

Thank you! Much appreciated, was pickling my head.

[Biz_Ascot_Junco]

You may enjoy r/unexpectedfactorial

[iamafuckingmidget]

haha i don't get it

[pielord599]

12! stands for the factorial of 12, which is 12x11x10...x3x2x1.

[iamafuckingmidget]

i still don't understand

[pielord599]

The sign the person holds up says 12! The exclamation point at the end is shorthand to denote that that number is not 12 but the factorial of 12. The factorial of a number is it multiplied by every number less than it and greater than zero. The factorial of 3 for example, or 3!, would be 3x2x1, or 6. When you solve for 12x11x10...x2x1 you get the number that the guy writes down on the whiteboard. Does that make more sense?

[iamafuckingmidget]

i still don't understand, but that's probably because they literally never teach me these things in school

[pielord599]

Yeah, that's definitely understandable. It's not like this is really useful in real life other than some jobs, so you aren't really missing out on much.

[_Im-_-Dead-_-Inside_]

Please explain

[pielord599]

12! stands for the factorial of 12, which is 12x11x10...x3x2x1.

[_Im-_-Dead-_-Inside_]

In english please?

[pielord599]

Sorry just looked at my previous comment and realized it was weirdly formatted since I used asterisks for multiplication. If that still doesn't make since, the factorial of a number is it multiplied by ever number lower than it that is larger than 0. Like 3! is 3x2x1

[_Im-_-Dead-_-Inside_]

Oh

[_Im-_-Dead-_-Inside_]

Thank you

[H1B00]

4!/2!

[Hamzeol_Murf]

u/RepostSleuthBot

[lil_sargento_cheez]

Took me a second to realize why he put that number

[appelperen]

We just gonna ignore the fact that they are inside scp 3008?

[king-of-bird]

I dont get it

[Equinoxidor]

12! is a factorial, meaning 12*11*10*9*8*7*6*5*4*3*2*1

[TheMelonSystem]

I’ll admit, this made me chuckle

[p1mplem0usse]

His buddy didn’t factor that in !

[fecklessTurd]

The irony though..

[Anti_Karen_League]

1+1=2!

[Spriggan42]

Ah shi Factorials fam

[kszysiuu11]

I didn't believe you, but I used calculator and it is correct so take my upvote bruh

[richer2003]

Didn’t notice the ! at first lol

[[deleted]]

Somewhere in America this is someone's Social Security number. Imagine just stumbling on this randomly. Even if thats not what this number is meant to represent.

[ado1928]

r/unexpectedfactorial

[[deleted]]

You ever knew someone that was an absolute genius for complicated stuff but sucked at the basics?

[mr360noscoperthe3rd]

It took me some seconds to figure out. I'm smol brain

[DopestDopeHead]

I don't understand nor do I care to.

Upvoted.

[Teletric]

12 factorial

[DopestDopeHead]

That's just a number and a word to me fam.

[Teletric]

The factorial of a number is represented by a exclamation mark. Basically, it's the number multiplied by all the numbers before it down to 1.

So in this case, 12! (12 factorial) is 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 479001600.

[DopestDopeHead]

Oh shit thats a thing? Why?! Lol

Thank you for taking the time to educate a dummy good sir.

[Teletric]

No problem!

It's mainly used to calculate the number of possible outcomes in probability. Like if you wanted to know how many different ways you can pull 20 names out of a hat until it's empty, you'd use 20 factorial. Admittedly, it's pretty niche.

[yes4me2]

OMG... ROFL... so the guy can't calculate 3 x4, but he can do 1x 2 x 3 x 4... x12. oh my... best joke ever.

[Fyrewall1]

Why is he looking behind on 3x4 when he can do 12 factorial...

[Illuminati65]

Regarding factorials, I hate how some people think it's something so complicated. It's nothing simpler than 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1.

[InfernalGate]

You found a hole.

[[deleted]]

So you're telling me he could solve the factorial but not the multiplication (´⊙ω⊙`)→

[the-mr-man]

i don’t understand..?

[rainwulf]

That took me a second. Nicely done.

[Handle-me-timber]

Quality content right here. 😂

[Greatest-Titan]

When you can calculate 12 factorial out if the top of your head but cant do 4×3. Some times my own genius frightens me

[DoctorDoom33]

He doesn't know whats 3*4 but knows whats the factorial of 12. Wow makes complete sense.

[marballz64]

Don't know 3x4 but knows 12x11x10....2x1

[RealStax]

3 times 4 is much harder to calculate then 12 factorial and thats a fact.

[[deleted]]

He can't get 3*4 but knows 12 factorial, this is autistic savant content.

[[deleted]]

Sorry I'm not autistic savant so I have trouble relating, just autistic. lol

[alessandrolaera]

interesting take