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@johnwalker98174 жыл бұрын
Michael: "It's so important to unify, but today we're going to divide." *Starts multiple civil wars.*
@thenixaless74934 жыл бұрын
Yeet
@vividandlucid4 жыл бұрын
Hey Vsauce, Michael here. As we all know, slave trade is unhumanitarian and unethical, and we should band together to abolish it. *Or should we?*
@hueban16434 жыл бұрын
fun fact: division in Swedish is called "bråk" which also means brawl or fight
@PuckishAngeI4 жыл бұрын
Hey Vsauce, Michael here. You probably think that Iraqi government is stable and legitimate, well think again, there are multiple claims and today we are going to ignite them and see how many new countries will pop up on the map.
@TheEricwn4 жыл бұрын
You mean divisible civil wars
@alexgabel43794 жыл бұрын
Schools: *close* Michael: ...or do they???
@Kitsudote4 жыл бұрын
*Vsauce music starts playing*
@Cowonahill_4 жыл бұрын
Sh1pp0K1tsune It started playing before I even read your comment. X)
@TuhinBagh4 жыл бұрын
DING!!!!!!!!!
@dewifrancis12994 жыл бұрын
My literal exams: Cancelled Michael: Or are they?
@dewifrancis12994 жыл бұрын
@@TuhinBagh dong
@yigitaganoglu1884 жыл бұрын
Michael: Is 80 divisible by 4? Me: I don't know. Let me ask my French friends...
@gonderage4 жыл бұрын
hon hon, it is la weed nombre.
4 жыл бұрын
Michel just missed a great opportunity to speak about ... you know, the big white Elephant in the room... THAT.
@user-xw4mu6nz4t4 жыл бұрын
How to get your maths answer: 1. Ask any asian friend (preferably Chinese or Indian) 2. If that doesn't work ask your teacher... 3. You're in a test? Try and remember this video you watched 9 months ago 4. Wait... nvm I can just Google it...
@ashleybyrd20154 жыл бұрын
@@user-xw4mu6nz4t and if that doesn't work be inspired by the meet the engineer SFM and solve it with a gun, and if that don't work try more gun.
@gwenrees75944 жыл бұрын
Quatre-vingt ;)
@RaynbowIsMe4 жыл бұрын
BRO when I was in elementary school we did all of these except we got told “there’s no rule for divisible by 7” they LIED!!
@davidcole29134 жыл бұрын
No, it’s just that no one had come up with one back then. And honestly, the trick that Michael shows in this video isn’t a quick rule at all. Very time consuming. At that point it is faster to just divide the number by 7.
@thepriestunknown39993 жыл бұрын
15:38 here we are
@nitaibaishya63743 жыл бұрын
We were told that it was too critical for us so they excepted...
@jeffw12673 жыл бұрын
@@davidcole2913 I have a book from 1960 that shows a divisibility by 7 rule, though it's sort of complex. You have to match up six digits in the number to the series 132 645, working from the rightmost digit first. If your number is larger than six digits you start the 132 645 series again. Each digit in the series is multiplied by the corresponding number in the answer. For 362,880, working from the right, you'd get (1x0) + (3x8) + (2x8) + (6x2) + (4x6) + (5x3) = 91. Then you divide THAT by 7 and get a zero remainder. I think it's easier to just divide the number by 7 straight through, especially if you are doing the problem mentally.
@indigofenrir72363 жыл бұрын
@@jeffw1267 @jeffw1267 Double the last digit and subtract it from the remaining digits. Ex. 434 => 43 - 2(4) = 35, which is 7x5, so 434 is divisible by 7. Using Michael's method, 1/10(abc - c) - 2c 0.1abc - 0.1c - 2c 0.1abc - 2.1c 10(0.1abc - 2.1c) = abc - 21c 21c is just 7(3c), so it checks out.
@movedlonely_space_egg11694 жыл бұрын
"divisibility rules" glad to see micheal sticking up for the underrated mathematical operation
@turtles104 жыл бұрын
lonely_ space_ egg I’m more of a fan of roots
@deaddead6984 жыл бұрын
Tristen Roddenberry idk man it’s all about quadratics imo
@ihateroads79264 жыл бұрын
Pepper Mint Nah logarithms are where it’s at
@JonnesTT4 жыл бұрын
Excuuuse you princess. Division is probably the most rad basic mathematical operation
@JonnesTT4 жыл бұрын
@uwau cube root of 24 the 2.88th Reich :D
@user-uq4gr5nl5o4 жыл бұрын
This turned into a math channel so progressively that I didn't even notice.
@danielmcdaniel12504 жыл бұрын
JJJ he’s literally numberphile rn
@cheesycheese604 жыл бұрын
It was supposed to be a channel with fun links in the description
@Ptaku934 жыл бұрын
@@cheesycheese60 maybe 5 years ago
@cheesycheese604 жыл бұрын
@@Ptaku93 u know time goes fast
@alevanderBatman4 жыл бұрын
@@Ptaku93 Well... no. The name literally means "Do Online Now Guys".
@vandithsreenivas59664 жыл бұрын
Two types of people: Those who write '8' in a single stroke Those who draw two circles
@adamqazsedc4 жыл бұрын
I draw 8 with a single stroke, obviously.
@squibble3114 жыл бұрын
the 2 types are 1. those who write it in one stroke 2. michael david stevens
@TechnicFyre4 жыл бұрын
It just comes out as nicer looking when you clearly make two circles. Unless they’re too far apart... or an accidental venn diagram...
@coltz-pun78714 жыл бұрын
What if I drew the two other halves of it
@possiple21264 жыл бұрын
I prefer to make a 3 and a backwards 3, please, I have standards
@HarryBallsOnYa3454 жыл бұрын
"Why Did They Change Math!? MATH IS MATH!" - Mr. Incredible.
@gabry_infernape4 жыл бұрын
Schools: *close* Michael: Fine, I’ll do it myself
@xkilla9114 жыл бұрын
this is a lesson on "discrete math" from college by the way.
@monkie24644 жыл бұрын
Fine, I'll do it BETTER myself*
@hellomine28493 жыл бұрын
ngl I learned new interesting stuff and I'm in high school
@-ahvilable-66543 жыл бұрын
He will not divide us
@user-cd4bx6uq1y3 жыл бұрын
990 likes
@joshfromjuniorstudios4 жыл бұрын
The hero we need right now, but not the one we deserve...
@Equa11ysurl4 жыл бұрын
Junior Studios Nobody truly deserves Michael..
@sean..L4 жыл бұрын
why is it in past-tense?
@gumunduringigumundsson93444 жыл бұрын
Mister past tense there is probably feeling lonely. Be kind.
@ChristakyMe4 жыл бұрын
deserve*
@kisaragiayami4 жыл бұрын
Guðmundur Ingi Guðmundsson ok boomer
@breadleymcthicc54444 жыл бұрын
Vsauce is that one mad scientist that makes everything fun, but at the same time everyone suspects him of being on crack.
@noctusion23922 жыл бұрын
Same for Micheal Reeves tbh
@ActionJackson6692 жыл бұрын
Maybe to people who have never seen a real crackhead before 😅💯
@whannabi2 жыл бұрын
@@noctusion2392 nah it doesn't feels the same he's crazy in his own way
@matttaco Жыл бұрын
wait he isn't on crack?
@hoseamathews5791 Жыл бұрын
@@matttacoor is he
@fresh-avocado4 жыл бұрын
I've been using these divisibility rules my entire life in school and never knew how they worked. Who'd have thought that their functioning would be so easy to understand. Thanks Michael, very cool 👏👏
@Eduardo_G4 жыл бұрын
Michael is starting to look like Charles Darwin with that beard
@thatladoverthere70754 жыл бұрын
Charles Manson*
@jellyman01274 жыл бұрын
Well, he is the next step in evolution for humankind.
@thedoctor8554 жыл бұрын
Michael is Charles Darwin reincarnate
@VoiceDisasterNz4 жыл бұрын
Or Friedrich Engels
@truediamant7774 жыл бұрын
Yes he is almost ready for the prophecy
@knicklicht79454 жыл бұрын
Michael looks like he already has been in quarantine for 5 months
@squibble3114 жыл бұрын
he never met other humans, he was always in quarantine
@OceanRedux4 жыл бұрын
BRUH LOL
@QuicksolutionsOnline4 жыл бұрын
He was in prison
@Retard6344 жыл бұрын
@@QuicksolutionsOnline based
@user-cu6yt1tr7h4 жыл бұрын
actualy 12 years
@honeybee94553 жыл бұрын
Mike: chooses 362,880 at "random" Me who watches numberphile: I see what u did there.
@shadrackbrentuo36653 жыл бұрын
???
@honeybee94553 жыл бұрын
@@shadrackbrentuo3665 the number has 160 divisors, is the factoral of 9, is a tau number, is pseudo perfect, etc.
@honeybee94553 жыл бұрын
@@shadrackbrentuo3665 basically all digits 1-9 are factors of 362880
Can you explain the joke please edit-I got it I guess he should have written 1729 because it is Hardy-Ramanujan number
@hhahah72632 жыл бұрын
?
@aryarathod91922 жыл бұрын
@@hhahah7263 it's a joke about hardy-ramanujan number which is 1729
@hhahah72632 жыл бұрын
@@aryarathod9192 idk what a hardy-ramanujan even is
@aryarathod91922 жыл бұрын
@@hhahah7263 It is the smallest number which can be expressed as the sum of two different cubes in two different ways
@elixir44194 жыл бұрын
11:46 “179200 I just made this one up” people he can create numbers he’s more powerful than we thought
@numberdballer4 жыл бұрын
Wat
@LeafShade4 жыл бұрын
@@numberdballer Until he made it, 179200 did not exist.
@joshuaslattery24164 жыл бұрын
@@LeafShade tbh i never thought about 179,200 before this video so id believe it.
@mathscienceonlineacademy45124 жыл бұрын
Exactly
@pikchassis3 жыл бұрын
The other number was a decoy!
@TheSektorz4 жыл бұрын
Michael looks like he's been isolated since way before this epidemic
@Megalomaniakaal4 жыл бұрын
So do I tho. Oh wait. But I have been isolated for far longer. Never mind...
@vanzwho8544 жыл бұрын
He has prepared for the random chimp event well. This man will leads us to victory against the chimps
@apersonontheinternet76074 жыл бұрын
Mind Field S1 E1.
@buttercopter93694 жыл бұрын
*pandemic
@macbeth83934 жыл бұрын
That would explain the 25 minute video on divisiblity rules... this man is clearly going insane
@AA-100 Жыл бұрын
Divisibility by each number: 2: Number is even i.e. last digit is 2,4,6,8,0 3: Sum of digits is a multiple of 3 4: Last 2 digits divisible by 4 5: Last digit is a 5 or a 0 6: Number is even and Sum of digits is a multiple of 3 7: Take 5× last digit and add to remaining digits OR take 2× last digit and subtract from remaining digits. Final total divisible by 7 8: Last 3 digits are divisible by 8 9: Sum of digits is a multiple of 9 10: Last digit is a 0 11: Alternate between Adding/Subtracting digits from left to right starting with Subtracting. Final value is 0 or divisible by 11 12: Last 2 digits divisible by 4 AND Sum of digits is a multiple of 3
@It-b-Blair Жыл бұрын
😮🤯
@natant9274 ай бұрын
Why cant 6 * 2 be used to verify 12😭
@zafnas52224 ай бұрын
@@natant927 It's because 6 has a factor of 2 ie. 6 = 2 * 3. This means that if a number is divisible by 6 then it must be even so it doesn't make sense to repeat the divisibility by 2 rule
@ChrisTian-mf8wu7 ай бұрын
Thank you for explaining not only "how" more importantly "why".
@atomicbomber20004 жыл бұрын
There's a trick for 7 that's even easier: Separate the ones digit from the rest, double the ones digit, then subtract the 2 numbers. Here are some examples 903 separates into 90 and 3, double 3 to get 6, 90 - 6 = 84 which is divisible by 7. (903 = 7 x 129) 3171 separates into 317 and 1, double 1 to get 2, 317 - 2 = 315, which splits into 31 and 5, double 5 for 10, 31-10=21 which is divisible by 7. (3171 = 7 x 453) Note: If this process gives you 0, the original number is also divisible by 7
@MrGamingANDfootball4 жыл бұрын
This is the one I know
@ireallydontknow32994 жыл бұрын
Oohhh, this is interesting. I suppose this is because adding -2 is the same as adding 5 modulo 7. As far as 7 is concerned, this is essentially the same as adding 5 times the last digit. Brilliant!
@angelmendez-rivera3514 жыл бұрын
eventhorizon51 The reasoning is very similar. I am going to use three digits for the sake of simplicity for this proof, but it trivially generalizes to any number of digits larger than 2 via induction. Any 3-digit number is given by x = 100d(2) + 10d(1) + d(0), where d(i) is between 0 and 9 inclusive, except for d(2) excluding 0. The proposed method is 10d(2) + d(1) - 2d(0), but it works because 10d(2) + d(1) = (100d(2) + 10d(1))/10 = (100d(2) + 10d(1) + d(0) - d(0))/10 = (x - d(0))/10, and (x - d(0))/10 - 2d(0) = x/10 - 2.1d(0) = (x - 21d(0))/10, and 21 is divisible by 7.
@randomnpc4454 жыл бұрын
This is also a much more useful shortcut if for some reason you don't have a calculator on hand. The one shown in the video is cool and all, but it's not very user friendly for larger numbers, not to mention having a bit of a complex process to it. This is a lot simpler and easier to follow.
@ireallydontknow32994 жыл бұрын
@@Aw3som3-117 I suppose only having to multiply by two will generate easier computations, so it might be slightly easier and faster than Michael's method.
@leg1t3434 жыл бұрын
He's acting like he didn't leave us hanging for 7 months
@ckv9544 жыл бұрын
- Leg1t Lmao
@peppermintmiso43414 жыл бұрын
He did have the holes one on Vsauce
@chugggs35164 жыл бұрын
Oh god I've just realized as well
@legendskys81884 жыл бұрын
Michael: Draws his 8 like that Everyone: Oooooooooooof no
@leavewe3 жыл бұрын
what's wrong with his 8s lol
@spartanforce73 жыл бұрын
That's how they teach us to draw them in the Navy.
@kegtuwa3 жыл бұрын
1:36 "First let's pick a number completely at random" Michael lied as naturally as he breathed
@shivamchouhan50772 жыл бұрын
Literally 9!
@Tsai_tama4 жыл бұрын
Plot reveal : Michael is doing maths to avoid being crazy in his asylum
@cinnabonbon4 жыл бұрын
Eh eh eh, no spoilers!
@TheBEST-eg4yd4 жыл бұрын
MATH*
@OmarBKar-sw1ij4 жыл бұрын
@@TheBEST-eg4yd It's called maths you American heathen
@ViratKohli-jj3wj4 жыл бұрын
@@TheBEST-eg4yd It is called maths
@DanielDiaz-zz6ih4 жыл бұрын
It'S cAlLeD MaFs! Words are words are words. Tyre and aeroplane are weird, though.
@KariMusic01164 жыл бұрын
Michael: Lets pick a random number also Michael: **picks a number divisible by all numbers 1 through 9**
@kickowegranie32004 жыл бұрын
he could have gone with smaller one, 7! (5040), it's also divisible into all the numbers 1-9 but it's much much smaller
@dzarko554 жыл бұрын
@@kickowegranie3200 Or an even smaller number, 7!/2.
@schrodinger69914 жыл бұрын
I think Micheal found the number himself and did not Google it. This is why he picked it I think.
@deidara_85984 жыл бұрын
@@kickowegranie3200 That is true, because 8 and 9 are not primes, and can thus be written has factors of the previous numbers, thus 7! is divisible by those as well.
@onemadscientist73054 жыл бұрын
@@dzarko55 which is the smallest (2520).
@justcuzbrosky4 жыл бұрын
There is something really cool in the inconsistency of Michael's writing. Sometimes he writes multiplication as an x and sometimes and dot. very cool.
@JanMilavec4 жыл бұрын
he probs also holds the world record for the most ways to write an 8
@sohamdey51244 жыл бұрын
In Divisibility with 7, I subtract 2 x (one's digit) instead of adding 5 x (one's digit). It is easy to calculate and works!
@A114N8D3 жыл бұрын
Came here to say the same thing.
@inderchopra4303 жыл бұрын
We can create multiple methods to solve the 7 one. Like multiplying unit digit by 1.5 and adding it to the rest should also work bcoz 1.5 - 0.1 is 1.4 But using whole numbers like 2 or 5 makes more sense I agree
@dorijanlendvaj83563 жыл бұрын
You can also, for example if the number is abcdefgh, look at h+3*g+2*f-e-3*d-2*c+b+3*a. Basically, going from the least significant to most significant digit you just repeat 1, 3, 2, -1, -3, -2. Much easier to do than the method shown in the video. As a bonus, all the other divisibility rules also preserve the remainder when divided by that number(for example, the sum of digits of 582 is 15 so it has a remainder of 6 when divided by 9). The rule for 7 shown in the video doesn't preserve the remainder, but this one does(but keep in mind that the remainder of -1 is 6, not 1).
@Jireninyourrecommendations4 жыл бұрын
I don't know if 49 is divisible by 7. Let me check that 4 + 9(5) -> 4 + 45 =49 Guess I'll never know
@june3494 жыл бұрын
Know your 7 times tables, just like you should know your 8 times tables
@jamieg24274 жыл бұрын
o o o o o o o o o o o o o o o o o o o o o_ o o o o o o o o o o o o o o o o o o o o o_ o o o o o o o Seven rows and seven columns. Count the o's and then you've got 'em.
@Dziaji4 жыл бұрын
Just keep doing the operation like Michael said to. It can take a while. Don’t give up!
@user-en7dx1qp3k4 жыл бұрын
Do it the other way: 4 - 2*9 = -14
@gumunduringigumundsson93444 жыл бұрын
@@user-en7dx1qp3k that makes no sense at all lol.. you trolled my cranium there hahaha gj.
@qwertism4 жыл бұрын
I wish I could divide Michael so I could have a part of him
@davidsphere434 жыл бұрын
Who says you cant?
@deathbyseatoast88544 жыл бұрын
@@davidsphere43 mhm, yes fbi thats the man.
@thewj12284 жыл бұрын
Psycho
@noahgreer14974 жыл бұрын
Or would you? *que music*
@strbourne4 жыл бұрын
I call dibs on the left foot
@DeMooniC2 жыл бұрын
This is the first time even in my life im watching a pure math video not because of school but because I wanted to... WOW, Michael really is powerful lmao
@prenomnom53044 жыл бұрын
It took a pandemic to see him around again on this channel. Nostalgia for isolation Michael???
@grampton4 жыл бұрын
Blue Shirt Wow bruh it didn't appear on my sub feed
@thealphas14 жыл бұрын
Damn we should have these pandemics more often
@spaghetti79294 жыл бұрын
it’s not nostalgia it’s trauma
@sy70287894 жыл бұрын
Not related message from a random Hongkonger for anyone watching: Remember the Virus is creating in China, it is all okay to call it China Virus. Never trust WHO cuz it is controlled by CCP.
@CryoCrow4 жыл бұрын
Me: Why does this work?? Teacher: bEcAuSe iT DoEs!! Michael: Weeelll. . .
@Rygir4 жыл бұрын
That's not a teacher, or at least a terrible one
@hafda0104 жыл бұрын
Шнат’s шітһ тһе шеігd теасһег сарітаls ?
@Real_Eggman4 жыл бұрын
@@hafda010 Why are you writing in russian letters?
@willrosu75293 жыл бұрын
“It is so important that we social distance....” *Five Months Ago* Ahh yes how quick five months went
@Brindlebrother3 жыл бұрын
isolation has increased the passage of time fivefold
@jeggehek69343 жыл бұрын
*3months ago*
@nates97783 жыл бұрын
@@jeggehek6934 and another one, another week down in the books :(
@m_e_nere3 жыл бұрын
2021
@chrisrj98712 жыл бұрын
The way I was always taught to find a multiple of 7 is to double the last digit and subtract it from the rest of the number. 14 = 8 - 1 = 7 49 = 18 - 4 = 14 = 7 798 = 79 - 16 = 63 = 7
@skittybug69372 жыл бұрын
"63=7" Something here isn't adding up...
@chrisrj98712 жыл бұрын
@@skittybug6937 - 63 = 6 - (3 x 2 = 6) = 0, which technically works.
@skittybug69372 жыл бұрын
@@chrisrj9871 r/woosh
@Dm3qXY9 ай бұрын
don't abuse the equal sign like that You can do this 7 | 63 "7 divides 63" or for the other way around, "63 dibisible by 7" i remember using in school three vertical dots like 63 :7 but with this unicode character VERTICAL ELLIPSIS (U+22EE) lookup the code. or like this 63 % 7 = 0 (modulo operation result )
@chrisrj98719 ай бұрын
@@Dm3qXY - It would have been far too long to type what I wanted to say, and I'm just here for fun... I think it makes enough sense once the numbers get smaller.
@xystem47014 жыл бұрын
I love how earnest Michael is. Keep making the world a better place
@kfdhbdj92244 жыл бұрын
What is earnest?
@drdoof29404 жыл бұрын
@@kfdhbdj9224 ear·nest1 /ˈərnəst/ adjective resulting from or showing sincere and intense conviction. "an earnest student"
@LSK2K4 жыл бұрын
@@drdoof2940 you use reddit by any chance?
@WakenerOne4 жыл бұрын
Michael: "In times like these, _we need to be _*_unified."_* Okay, how many people immediately said, _"Or _*_do_*_ we?"_
@OceanRedux4 жыл бұрын
guilty as charged
@WildStar20024 жыл бұрын
@@OceanRedux me too!
@antonioocchipinti8014 жыл бұрын
Ok I'm kinda embarassed to ask this but... so I'm pretty good at english becouse I'm learning it since I was 6 but I still don't understand what "Or do I" meme means
@WildStar20024 жыл бұрын
@@antonioocchipinti801 No need to be embarrassed about that! It's something Michael say A LOT in his videos. That's all! 😃 Watch a few more from VSauce and you'll see what we're talking about!
@onedarthyear7264 жыл бұрын
antonio occhipinti the ‘or do i?’ meme uses sarcasm. Sarcasm is a type of humour that becomes funny by doing something unexpected. Like saying (insert random dictator here) did nothing wrong. The joke teller doesn’t think that that person did nothing wrong, but its so unexpected and rude that it becomes funny.
@nicksummers83204 жыл бұрын
My favorite part of my Number Theory elective in college was proving the divisibility rules for 3 6 and 9. They seem so not math-y when you learn them as a kid, but the proof is very easy to understand
@torin10064 жыл бұрын
Divisibility in base 6: *1* If the number ends in the ones place, then the number is divisible by 1. (same as 1 in base 10) 1:08 *2* If the number ends in 0, 2, or 4, then the number is divisible by 2. (same as 2 in base 10) 1:14 *3* If the number ends in 0 or 3, then the number is divisible by 3. (same as 5 in base 10, but replaced by 3) 1:17 *4* If the sum of the ones place digit and the double of the tens place digit is divisible by 4, then the number is divisible by 4. (same as 4 in base 10) 3:17 *5* If the sum of the digits is divisible by 5, then the number is divisible by 5. (same as 9 in base 10, but replaced by 5) 2:29
@Kai_On_Paws_42983 жыл бұрын
Good!
@coookieman3342 жыл бұрын
best base
@subhradipporel9598 Жыл бұрын
what's the point j/k
@insanitycrafter8553 Жыл бұрын
Hi, I'm jan Misali, and-
@Dm3qXY9 ай бұрын
is everything ok here? blink if in need for help
@noahwilliams89964 жыл бұрын
Other youtubers: "Corona virus!" Clearly superior vsauce: "divisibility tricks"
@mrghostlyr11624 жыл бұрын
Yup, let's study to keep graduation possible (ahem homeschool) - internet available - free will available - no teacher peeking for rule breaking - school rules : no rules, games
@CRAIGC554 жыл бұрын
If people ate right they wouldn't have to worry about any virus.
@mrghostlyr11624 жыл бұрын
@@CRAIGC55 Well, then people must feed animals the right way, make special meal schedules, and redo the FRIKKING BIOLOGI, viruses are here because they are predictors too, imagine life 200 000 years ago but in the kingdom of bacteria, viruses, cells, whatever nothing has changed
@CRAIGC554 жыл бұрын
@@mrghostlyr1162 Viruses thrive off of bad cells. If you have been eating dirty for years, you will be a breeding ground for illness. If you remove the bad cells, virus has nowhere to live. Minimal place to live at best.
@noahwilliams89964 жыл бұрын
@@CRAIGC55 That's not how it works. At least not with corona virus. Corona virus will infect your cells regardless of whether they're "clean" or not.
@randomgblsfs21904 жыл бұрын
When Michael said that the random number is not actually a random number, I felt betrayed.
@Speed0014 жыл бұрын
No number is truly random.
@hellomine28493 жыл бұрын
@@Speed001 vsauce theme starts playing
@WWFYMN3 жыл бұрын
@@Speed001 Or is it?
@theneoreformationist3 жыл бұрын
I could tell by looking at it LOL
@ayaanshaheen66043 жыл бұрын
@@theneoreformationist It is 9! or factorial
@dawinsor873 жыл бұрын
Michael thank you for all of your Vsauce, Mindfield and Ding videos! The content is some of the most fascinating stuff I've watched on the whole internet. Your method of presentation and your subtle humor makes for a really enjoyable experience.
@brosky1174 жыл бұрын
Michael’s buttery smooth stream of consciousness teaching is absolutely god tier.
@drifted35664 жыл бұрын
D!ng dong Who’s there? Vsauce Vsauce who? Vsauce, Michael here
@br67684 жыл бұрын
Wasnt this channel called dong?
@claytonbyrd61344 жыл бұрын
@@br6768 it was, but KZfaq wasn't happy about it.
@aryyancarman7054 жыл бұрын
@@br6768 what dong? It was never called dong, trust me..
@frostonium4 жыл бұрын
@@aryyancarman705 it did kinda called dong something you can Do Online Now Guys Before it was reffering to uhhh the thing and its called ding now. I think anyways lol
@0bread2864 жыл бұрын
frostonium He was joking. As though the channel once being called dong was something that couldn’t be talked about.
@basantachaulagain61044 жыл бұрын
"They allow us, in this lonely times, to make a bunch of new friends, math friends." --Michael, 2020
@tracyh57514 жыл бұрын
At first I thought he was talking about all of us watching this video together. More and more, I am convinced that Michael is talking about the math itself. The math is our new math friends.
@DucNguyen-rk8zu4 жыл бұрын
Yes
@sophiegrey95763 жыл бұрын
Hey, you forgot to do zero! There's a really cool rule for that one! Step 1: Don't.
@RandomPlaysGames27632 ай бұрын
Michael: First, take your number and a̶̤͖͔͚̣̺͙͋̓̉̿͊̏̂̍̐̆͒̄͋̓̈́͑̃̒̈͂͌̃̀̍͊̌̎̈̐̽̈́̀̏̇͊̌͠͠ả̴̢̧̨̛̛̯͇̥̫̳̦̣̖̙̙͎̞̞̙͕͔̲̯̰̟̪̖͈̱͈̦̺̱͓̠͍̦̩̩̘͈̻͖̹̮̦̼̉̆̍̑̆͑̇̉̈́͒̈́͋̂̈̌̑̾͒̄̎̀̌̇̋͛͗̉̑̂͐̊͑̔̓͋͌͌̕͜͝͝͝ͅa̶̧̧̢̧̧͕̥̤͖͇̞͇͎̝̣͓̮̦̫̮̪̟͉̪̫͇̙̳̠͍̥̦̘̫̜͑̒͜ͅͅ@̶̡̧̧̡̧̡̦͇̙̪̥̱͇̞̖͉̜͎͕̺͓͚̲̜̯͎͇̦̠͎̤̩̱͚͕̭̫͚̮͇̌̑͛̂̑̂̆̌͋̄̾̎͊̑̇̌͋̈́́̋͋͜͝@̸̗͎̲̭͚̞̫̈́̊̽͘@̸̡̢̢̡̰̠͉̲̺̘̳̳̰͙̗̫͚̻͓̬̫̖͚̬͓̙̻̫͓̻̱̱̗̓́̉̊̃͛́̓̀̆̇̊͂͋̀̈̾̌̆̏̓̄͌͑́̇̕̕̕͜͜͝͝͠͝@̴̡̧͉̗͖̟̣̱͖̩̘̥͗̂̐͐̑̈́̅̈́̔͐́̍̈́̈̎̔̽͆͒̀̅̿̅̓͊̇̐͂̑͐̋̔̄̕̚͘͝͠͝͠͝a̴̢̧̧̢̛̦̘̲̝̖̹̥̖͍̯̩̩̪̤̟̙̻͕̟͎̥̘̬͇̍̏̂͛̇̍̈́̾́̄͐̓́̇̒̉̈́̈́̽̍͆͋̓̃͂͑͑͌̈́̇̍̕̕͘̚̚͝͝ͅa̵̡̨̰̳͕͕̯̺͖͚̖̪̮̩͔͈̙͕̣̠͎̞̜͍̬͉̜̠͖̲̻̜̟̣͓̅̽̿̂̇́̕̚̕̚͜͜͜ͅa̸̡̢̗͍̖͖̲̖͈̼̱̮̩̩̯̳͕̜̪̞̠̞̱̞̹͙̭̗͚̲̅̋̉́͆̄̈͌̀͑̊̔̃͗̔͌̀͑̄͛̃̑́̈̍̐͊̊̇̋̾̾̚̚̕̕͜͜͠͝ͅͅa̷̢̨̢̭̪̝͉͔̬͈̖̝̜̗͕̳̱̰̝̜̲̼͚͈̘̫͍͔̼̞̭͕̜̝̤̩̪̪̖̫͎̫͐́̉̈́̊͜͜ͅͅÂ̵̛͓͕̱͕̹̠̹̘̠͑̈́̄̎̍̌̈́̊̏͐̈́̌̈́̍̌͋̕̕͜͝͝A̷̢̨̧̼͚͉̙͎̯͚͖̜̣̦͍̖̣̰̺̗͕̞̪͇̹͎͔̼̤̼͚̦̦͑̀̔̋̈̉̀̅̅͊͠A̶̛͔̺̼̬̠̗̤̪̠̦̝̱̲̖͎͎̳͖̦͖̥̭̠̺̩͌̇̽͐̇͑͗͐̃̈́̑͑̓̽̈̆̔̂́̋̒̔͋̾͊̔̽̆̒̏̇̓̚̚̕͜͜͝͝͠͝͝A̷̭̟͙̬͇̝͍̪̘͒́͌̓͋̈́͐̚̕A̶̛͉͙̖̙͙̠̩̰̪͍̱͓̟͍̱̞͚̹͎̪̳̫̓͛́̂̄͜ͅ4̵̮̳̻̞̻̥͒͊̓̀̎̑̃͆̇̌̽̉̊͂̓̂̓̀̆͐̿̏̅́̏̄̌̀̑̐̿͊̽̍̚̚͘͘͠͠͝A̸̡̢̛̮͖̟͙͇̞͕̙̪̻̺̱̹̪̻̰̖̣̹̼̫̍̓̓̊̂͌̆̊́̄̄͒͑͌̓̚͘͝4̷̛͓̮̘̞̣̪͓̹̬̼̲̇̓́͗̈̅̐̀͐́̈́̀̈́̈́̀̋͑̀͐̿͘̚͜͜͠͠ͅ4̷̛͉̩͕̗̻̀͋̆̓̏͗͛̇̆͑͒͐̂̾̌͌̈́͋͋̚͘͜͝͝͝A̵̛͖̠̙͎̅͐̍̃̉̇͌̀͒̒̇̅́̓̾̊̀̾̎̄̅̈́͒͛́̄͛̑̌̀͆̊̇͗̀̒̾̚͘̚͝͝͝͝4̴̛̛̛͕̝͎̟̘͍̼̝̎̔̄̅͛͗͑͋͐͛̊̌͛̒̔̎̓́́͗̍̔̆̾̽̑̈̕͘̕͝͠͠͝ͅĄ̷̡̨̨̡̢͎̲̺̱̘͉̘̩̤̦͇̣̭͍̳͕̝̲̲͓̦̩̟͚̹̜͈͂̿̊̀̈́̐̌͆̾̎́̈͑͋̌̈̉̚͝͠ͅA̷̤̖̣͙̭͇̰̠͇̝̩̬̝͍̜̎͐͒̎̃̍̏̃͆̓̐̇̐̋̈̈́̑͒̈́̈́̑̍̿͌͆̇͌͛̽̑͌̐̎̂͗̊̿͋̊̅̄̚̚̕͠A̵̧̧̤͈̬̠͇̗̜̳͍͎̟̝̥͇̻̻̺̘͎̪͇̼͐́̀̌̽̌̔͛͒̑̏̿͐̐̓̈́́̋̓͌̑͋̈͂̏̉̇̔̂̒̊̕̕̕͝A̶̡̧̡̛̦͖̤̦̘͍͖̘̱͓̫͔͍̹̭͎͎͇̘̞̖͍̥͙͍͓̥͙͙͕͐̈́̉͒̓́̏̃͆̀̈́̀͑̅̑̏͋̈́̓̊̀͗̔̎̾͜͝ͅͅA̴̢̧̢̨̨̨̡̬̳͇͔͇͕͍̭̳͓͉͚͓̞̮̫̜͎̖̗̫̦͓̼̺̟͎͕̝̬͔̭͈̗̰̻̼̪̺̝̾̋̈̒̂͊̎̈́̅̾͐͂̀̚̚̕͜͜ͅA̵̢̡̖̣̤̟̪̩͎͔̦̩͚͖͈̗͔̳̩͙̻̯͚̦̽̓̏̚̕̚͜Ȁ̶̢̨̝̜͎̞̩̦̦̠̫͇̦̮̖̲͕̥̱̤̲̟͇̫̫̫̥̥̈́̌̐̅̑͑͂̀̋̉̎͐̉̋̽͐͆̿̃̉̉͊̚͜͠A̵̛̛̰̎̾́̎́̍̄̿͆̂̓͋͗̄̃͆̾̉͑̈́́̂̂̑̄͆̋̄̌͗̓̒̈́͊̒̏̚͘̕͝Ä̴̡̢̡̡̢͙̗̣̩͉͔͓͍͔͚̞̮̥̹̖̞̥̠̮̳͍̹͈̱̐̅̎̄͜ͅẴ̸̢͚̲̳͚̳̳͍̙͖̞͔̞̥̜̪̉͛͗̅͒̾̔̽̈́̑͛̓̑̐̍͊̒̋̉̕͘̕͘A̵̠͕͚̣͈̫̬͙̳͐̄̍̑͐̋͒̊̑͗͂̅͘͠A̷̡̛̠͈͍̭̠̻͎̣͉̹̪̯̤̐̎͛͒̏
@rich10514144 жыл бұрын
You know, I just realized something. Ever since Michael's isolation experiment, he has never been the same. Are we going to be ok?
@GeorgTheGr84 жыл бұрын
I bet Micheal is powerful enough to know what happens when you divide by 0
@the_man_of_sex14274 жыл бұрын
Hi
@dysondyson95244 жыл бұрын
Le Rebel Flagship an error message
@renerpho4 жыл бұрын
I've heard when you divide by 0, Chuck Norris appears and does a roundhouse kick.
@joshl904 жыл бұрын
Le Rebel Flagship it is infinity. You’ll learn about it in calculus when you go over limits
@oswurth87744 жыл бұрын
The answer is probably hidden in his beard
@CallMeCarlos14 жыл бұрын
"I'm going to pick a random number"
@rmay22154 жыл бұрын
*it's casually divisible by all numbers from 1 to 10*
@alexandreman86014 жыл бұрын
@@rmay2215 it's casually 9!
@UnsIiced4 жыл бұрын
@@alexandreman8601 It'S nOt NiNe ThOuGh
@alexandreman86014 жыл бұрын
@@UnsIiced it's 9 factorial
@FedeRama4 жыл бұрын
"but what is random?" -Michael, 2014
@magma_bone Жыл бұрын
i turned this on while playing a game and didn't notice it was playing, I completely zoned out
@diggygenetics82273 жыл бұрын
How has this channel existed for 5 years and I’m just learning about it now!?!
@vevorjepo14564 жыл бұрын
"in times like these, we need to be unified, but today, were going to divide." *avengers music starts to play*
@Robbnlinzi4 жыл бұрын
vevor jepo thanos wants to chat
@bertiljohansson56654 жыл бұрын
Just gonna leave this here: 10:18
@nickb85074 жыл бұрын
Bertil Johansson has oooh ooooooh 😫
@LeonStevenWilliam4 жыл бұрын
20:23
@santicruz40124 жыл бұрын
Thank you
@zmirburger4 жыл бұрын
thank you this has changed my life
@caritahearts24054 жыл бұрын
Vsauce out of context 4 babeyyy
@interestingperson72052 жыл бұрын
I remember watching this when it came out. I didn't understand it back then but now after some algebra, and now calculus, This actually makes a lot of sense.
@abrams58194 жыл бұрын
8:25 I was so looking forward for that moment to come, and when it did the song that kicks in when Michael says "or does it?" kicked in my head.
@billborrowed39394 жыл бұрын
10:18 I mean, come on. He just wants us to make memes.
@melovepeas4 жыл бұрын
Other integers: lmao just check if these digits are divisible 7: R E C U R S I O N
@angelmendez-rivera3514 жыл бұрын
Actually, there are divisibility tests for 7 that are simpler provided you have a fixed number of digits to work with. For example, if I want to work with 3 digits, then any number will expressible as 100a + 10b + c. 98a + 7b will always be divisible by 7, because 98 is divisible by 7, since 98 = 70 + 28, and 28 is divisible by 7. Therefore, one only need check if 2a + 3b + c is divisible by 7 to check if your 3-digit number is divisible by 7. The problem is that this does not generalize as easily to any other number of digits. For example, if you want to check for 4 digits, as in 1000a + 100b + 10c + d, you instead have to check if 6a + 2b + 3c + d is divisible by 7. In other words, the quantity you have to check depends on the number of digits. This does not require recursion, but it trades for having infinitely many rules, one for each number of digits.
@melovepeas4 жыл бұрын
@@angelmendez-rivera351 i was gonna say calm down its just a joke but that's actually a really cool point. It's not immediately obvious why 7 causes so many issues
@Bluedragon25134 жыл бұрын
A computer scientist's worst nightmare come alive
@onemadscientist73054 жыл бұрын
@@melovepeas The reason is that 7 is prime, and thus coprime with 10 (it shares no common factors with 10 other than 1). But, you say, it works with multiples of 3 ! And that's because 10 is 1 away from a multiple of three, which is actually a very special thing. Basically, there's no general rule... unless there is one. That is, it only works in special cases and in general you just have to go the recursive route. It's amazing how many things we take for granted about numbers when a lot of properties we think as intrinsic to the numbers themselves are actually dependent on the base being used.
@PTNLemay4 жыл бұрын
7 is special boi
@hastley64 Жыл бұрын
when he said "let's pick a completely random number" the number 69 was just written on his face
@supersonictumbleweed Жыл бұрын
Michael is my perfect antidote to my technology-ruled existence
@exzyyd3924 жыл бұрын
Oh yeah! Michael is back OH NO, MICHAEL HAS BEEN LOCKED INSIDE FOR AN INDETERMINATE AMOUNT OF TIME
@bekeba4 жыл бұрын
Flashbacks
@Kalay0Fox4 жыл бұрын
chew
@Leonardo-G4 жыл бұрын
Not exactly a divisibility rule, but: To check if a number is prime, you only have to check all primes up to its square root. For example: is 103 prime? It’s square root is between 10 and 11, so check 2, 3, 5, and 7. We know it’s odd and doesn’t end in 5 or 0, and that 1+0+3 =4. The only one left is 7, which we test with the trick in the video: 10 + 5(3) = 25, so 103 is not divisible by 7 and is therefore prime.
@akkok50594 жыл бұрын
why do we check with 2,3,5,7? Sorry I'm not really good lol
@Waouben4 жыл бұрын
@@akkok5059 First why do we only check divisibility with prime numbers? Because non prime numbers can be written as the product of prime numbers. Why is that? Because if your number is divisible by a non prime number, you can divide the factor once more until only prime numbers remain. For example, let's take 20. 20=2×10. But 10 is non prime which means you can divide it. 10=2×5. In the end, 20=2×2×5. You only need to check prime numbers to know if your number is prime. The only prime numbers below 10 are 2, 3, 5 and 7.
@Waouben4 жыл бұрын
@@akkok5059 Secondly, why only check up to the square root? If your number is divisible you can write it as n×N, with n
@MrManiakKomputerowy4 жыл бұрын
@@akkok5059 Because the rest of numbers between 1 and 10 are product of primes. Take the number 103 and check divisibility by 2, then 3. Now we have 4, but if the number is divisible by 4 then it's also divisible by 2 and we checked that already. Next comes 5, then 6 but if the number is divisible by 6 then it's also divisible by 2 and 3 - we checked that already.
@kryt79553 жыл бұрын
the fact that he writes 8 by drawing 2 circles unsettles me
@htsgm Жыл бұрын
i didnt know you made a video about my current math class subject thank you
@akul54004 жыл бұрын
Oily black man.
@2neutrino4 жыл бұрын
Thus
@technoultimategaming29994 жыл бұрын
Ikr. I'd say Vsauce fits really well
@g.hmusicc4 жыл бұрын
Technoultimategaming yeah with an intro like “hEy vsauce michael here!”, that sounds cool.
@whitetiger81154 жыл бұрын
Omg ur right it should
@Drozey7104 жыл бұрын
I agree however he doesn't seem like the type of guy to have time to upload..
@qdudehome98894 жыл бұрын
8:26 At this point, I heard the music
@Andrew90046zero4 жыл бұрын
me 2
@scmtuk36624 жыл бұрын
kzfaq.info/get/bejne/irRiaMqZ0MzLgXU.html
@moppenboek4 жыл бұрын
These rules are like card games. They are fun and easily remembered. But before starting you need to look it up again.
@mitigiant53284 жыл бұрын
4:52 How do you write 8? Me: like a vertical infinity symbol Michael: No it's two zeroes kissin each other
@waiitwhaat4 жыл бұрын
Amateurs- "Number" Heroes- "Numerical" Legends- "Number in base 10" Michael- "Spelling of the number" (2:28)
@tap204 жыл бұрын
Spelling of the number in base (20/5) +(2*3)
@SLAMgamer114 жыл бұрын
Mathematicians - n, such that it is a member of a set R
@dhruvamehrotra19754 жыл бұрын
Well, technically they are digits.
@jackholmes70034 жыл бұрын
@@tap20 Base 12?
@luiginotcool4 жыл бұрын
@@jackholmes7003 check again, it equals 10
@3bhma1974 жыл бұрын
Michael: "let's choose a random number" Michael: *choses 9!*
@softlysnowing39594 жыл бұрын
i know right
@caleblewis81694 жыл бұрын
He did it on purpose he winked i think
@softlysnowing39594 жыл бұрын
@@caleblewis8169 Of course, It's not like I didn't know I knew something fishy was going on.
@br67684 жыл бұрын
He writes 8's the same way I do!.. I always though I was weird but now I feel cool 😬
@brownah4 жыл бұрын
Dwade : also chooses 9
@AlwaysRushesIn3 жыл бұрын
Michael just taught us Common Core Math in an engaging and understandable way. The Department of Education needs to have him design the curriculum.
@vampire_catgirl5 ай бұрын
I go back and watch this video over and over again simply because the explanations for how it all works is absolutely beautiful, and of course Michael talking about anything always makes it better too
@mother-chugger4 жыл бұрын
just when i thought this channel would never see the light of day again
@afikanto41264 жыл бұрын
@@blueshirt1619 we are aware blue shirt. You no longer have to reply with this link anymore. Thank you for your service. -3-
@omarziada54 жыл бұрын
Michael: now let’s see if it’s divisible by four. My brain: oh yes, we can half it twice. Michael: take the first number in the two digit number and double then add it to the second digit. Me:...
@KaitouKaiju4 жыл бұрын
If half the last two digits is even, then it's divisible by 4 Seems way more straightforward
@dylankrejci99654 жыл бұрын
@@KaitouKaiju that doesnt account for numbers like 16. 6/2=3 which isnt even. but as we know 16/2=8, and 8/2=4 so its even
@GRBtutorials4 жыл бұрын
@@dylankrejci9965 It's the last two digits, not the last one. For 16, it'd be 16/2 = 8, which is even, so it's divisible by 4.
@steffen51214 жыл бұрын
Try dividing 426,421,295,739,292,069,436 twice in your head to check. I know it is divisible by four right away thanks to Michaels trick.
@TheArchoNils4 жыл бұрын
@@steffen5121 You don't get it. You only half the last 2 numbers and check if it's even >___>
@o0o-jd-o0o953 жыл бұрын
I got halfway through the video and Michael is showing us why these tricks work , I began to realize that this is how I do work in my head instead of writing it all down. this is the way I simplify the work so that I can do it in my head instead of having to work it all out on paper
@kapitanOsveta4 жыл бұрын
what surprised me most is when michael talked about result of dividing by 3 as a set of groups of three. i always imagined it as three groups of same size.
@HI3Enjoyer4 жыл бұрын
Looks like I only knew a fraction of this topic.
@fawzanfawzi99934 жыл бұрын
Good pun
@chrisheli14 жыл бұрын
I don't have much to add here
@mlgepicbanana694 жыл бұрын
This made me laugh on *multiple* levels
@HI3Enjoyer4 жыл бұрын
@Jacob Vachon no matter how hard you try to stop us all, there will always be a remainder...
@Carbon_Crow4 жыл бұрын
Relevant trivia: The number 2520 is the smallest number that's divisible by 1-10. Edit: It also has many other interesting properties such as being: - half of 7! (7 factorial) - a highly composite number (if you don't know what that is you may want to watch this video: kzfaq.info/get/bejne/aLB9ZdJ60sidgZs.html) - a colossally abundant number (I've tried to find and video or website that explains it in an understandable way but I can't find one) - a Harshad number (a number that is divisible by the sum of its digits. Ex. 24: 2+4=6, and 24 is divisible by 6) - the aliquot sum of 1080 (a rare relationship between two numbers where the sum of one of their factors is equal to the second number and the sum of the factors of the second number is equal to the first number. If I didn't explain it well I recommend watching until 1:30 of this video: kzfaq.info/get/bejne/jdqSnqWdnMnYZH0.html)
@shoaibakhtar43894 жыл бұрын
Thanks for info friend
@shoaibakhtar43894 жыл бұрын
@@sy7028789 but i think this was a conspiracy theory 😅 isn't it bro?
@horizonkage4 жыл бұрын
Math is broken. 2520 single digits should replace 1-10.
@woutervanr4 жыл бұрын
I always approve of Numberphile videos. Especially after receiving my piece of pie yesterday :)
@Carbon_Crow4 жыл бұрын
@Wouter vanR I prefer Tau over Pi but I kind of feel bad for Pi this year; nearly everyone forgot about Pi day because of the coronavirus Edit: grammar
@archdiangelo79303 жыл бұрын
Michael: "...But how do these tricks work?" Music: "..." Me: "...Wait, what- nothing??? Wow, I have never felt the absence of the Vsauce music so keenly..."
@Hamlerk4 жыл бұрын
0:00 this is my new messenger notification.
@calvinwhite62194 жыл бұрын
"COVID-19 is extremely viral and we should practice social distancing... Or should we???"
@dhavalghone93984 жыл бұрын
Hahaha classic Michael am i rite?
@bluebaconjake4054 жыл бұрын
*big brain music starts
@pinicius4 жыл бұрын
* cue Vsauce music * -- music stops -- * Michael looks serious at the camera * Yes! Yes, we should!
@92jwiener4 жыл бұрын
Vsauce: Here in Miami, FL...
@bear43044 жыл бұрын
Yes
@m.gaiolas4574 жыл бұрын
19:22 "Oh! Look at this!" A new meme is born.
@lubomirkubasdQw4w9WgXcQ4 жыл бұрын
Clever.
@nursmalik60244 жыл бұрын
I like how he went so crazy that he makes these reactions on calculations
@spencermovies4 жыл бұрын
Michael! I though of a way faster method to check divisibility by 7: 1. Take the leading two digits of the number. 2. Divide by 7 and find the remainder. 3. The remainder becomes the new leading term 4. Repeat until you recognize the number as divisible by 7 or not. E.g. 362,880: Not sure if divisible by 7 36->1 12,880: Not sure 12->5 5,880: Not sure 58->2 280: Pretty sure 28->0 0: Divisible by 7
@NotBigSurprise3 жыл бұрын
This is exactly what I needed. The finals from last semester were delayed and they'll be soon, and this is a perfect way to remind myself about divisibility rules.
@june3494 жыл бұрын
For those of you who forgot the rules as soon as you stopped watching: 2: If the number is even, it can be divided by 2 3:Take all the digits in a given number and sum them up. If the resulting number is divisible by 3, the original number is divisible by 3 4: If the last 2 digits of the number form a number that is divisible by 4, the whole number is. OR. Take the 10s digit and double it, and then add to that the ones digit. If that number is divisible by 4, the original number is as well. 5: If the number ends in 0 or 5, it's divisible by 5 6: If the number is divisible by 3 and is even, it is divisible by 6 7: Take the 1s digit, and multiply it by 5. Then, add to it the remaining numbers as if it were its own number (the whole thing, not each individual digit). If the resulting number is divisible by 7, the original number is as well. 8: Take the hundreds digit, and multiply it by 4. To that, add the tens digit times 2. To that, add the ones digit. If the resulting number is divisible by 8, the original number is divisible by 8. 9: If the sum of all of the digits in a number is divisible by 9, the original number is divisible by 9 REMEMBER: All of these processes can be done multiple times if you are unsure if the resulting number is divisible by the number (1, 2, 3... ,9)
@Idisagreethisisnotanon4 жыл бұрын
Matthew Riachi thank you soooo much!!
@xythrr4 жыл бұрын
You forgot 1 help
@june3494 жыл бұрын
@@xythrr Every number is divisible by 1
@softlysnowing39594 жыл бұрын
@@june349 Not True; Every Integer is divisible by 1, not every number
@june3494 жыл бұрын
@@softlysnowing3959 I never said evenly divisible. I just said divisible
@nickoates4 жыл бұрын
I never thought I'd heard Michael say "Dong" again...
@RandomPlaysGames27632 ай бұрын
Unlike the time he said "Ussie"
@gregorynelson1568Ай бұрын
Because 200 is evenly divisible by 8, there is an alternate way to check for divisibility by 8. Given last digits: ...abc, find 2b+c as you did with 4, but if a is odd, add 4, if a is even, ignore it. If (2b+c +[4, if and only if a is odd]) is divisible by 8 then the original term is divisible by 8 as well.
@dangakun Жыл бұрын
This is the onboarding video for new employees at the math factory
@duchi8824 жыл бұрын
I came here with a Popcorn I came out with a Mathematics Degree
@0bread2864 жыл бұрын
No one, Duchi: *a* popcorn
@hachikiina4 жыл бұрын
only one
@b0leg234 жыл бұрын
Shouldn't you say "went out"?
@saulo43024 жыл бұрын
Also, popcorn with a capital "P", which implies it's either someone's name, or a place's name. You can't carry a place around -or can you?- , so I guess they watched with a friend?
@JoniKauf4 жыл бұрын
10:18 When she says, my parents aren't home.
@gumunduringigumundsson93444 жыл бұрын
🤣👍
@rjkzk4 жыл бұрын
0:00 her doorbell after 0.1354 seconds
@JoniKauf4 жыл бұрын
JS K (*≧m≦*)
@saulo43024 жыл бұрын
@@rjkzk If "That Guy" can help me out please, I'm trying to learn more about the english language. Technically that's not more than one second, so should it be "0.1354 second"?
@sirBumpyCase2 жыл бұрын
I love how simply he puts it. He could have made this way more complicated.
@TakeMeOffYourMailingList3 жыл бұрын
Another interesting you're doing when multiplying the base-10 digits by 2^(offset from right) when checking for 4 and 8 is checking that the binary representation ends in 00 for 4 and 000 for 8. (likewise, 16 is 0000 and 32 is 00000, and so on)
@b.f.1414 жыл бұрын
I respect Michael so much that I'm getting to bed just to watch him the most comfortable I can be. he deserves all my attention.
@thomasschmidt41934 жыл бұрын
B. F. S I M P
@hamimseam25914 жыл бұрын
Thomas Schmidt michael’s an exception, he’s not a thot
@caleblewis81694 жыл бұрын
Better than math teachers
@jfk90904 жыл бұрын
@@thomasschmidt4193 reddit moment.
@randomnpc4454 жыл бұрын
Legit did the same thing. I routinely eat snacks or meals while I watch videos, but opted out of doing that with this one so I could pay attention to it.
@viktor59184 жыл бұрын
I´ve been practicing self isolation my whole life....
@emrekaraman68774 жыл бұрын
Gamer
@nolongerusing74304 жыл бұрын
same
@gabor62594 жыл бұрын
Introverts unite! Separately in our rooms. _(stolen comment)_
@Yehyasalman46Ай бұрын
Bro explained better than my math teacher
@bluthemeth3 жыл бұрын
Divisibility rules of 4, 8, 10, 11, 15, 20, 30 or 50: 4: If the number is divisible by 2 twice. 8: If the number is divisible by 2 thrice. 10: If the number ends in 0, it is. 11: If the sum of the odd positions of the number minus the sum of the even positions of the number is 0 or multiple of 11 (abcd-> (a+c)-(b+d)= 0 or multiple of 11) 15: If the number is divisible by 3 and 5. 20: If the number is divisible by 2 and 10. 30: If the number is divisible by 3 and 10. 50: If the number is divisible by 5 and 10.
@Halbairn4 жыл бұрын
_All aboard in Michael's online classes!_
@amgil4754 жыл бұрын
D Sauce your name 😂😂😂😂
@averagemilffan4 жыл бұрын
Kimi no na wa
@anzahanifathallah4 жыл бұрын
i learned a lot of these as a kid and one favorite pastime of mine is to mentally add the digits on license plate numbers to determine whether or not they're divisible by 9 (license plates in my country always have a 4 digit number in them)
@user-dt8mf8nt2v4 жыл бұрын
I got quite confused by the "4 number digit" thing for a bit so I just wanna let you know you switched those around
@sharabhojha78954 жыл бұрын
Wait, so only 9999 people live in your country? There has to be some other combination of letters added in as well, right?
@edgarsxdwoo74174 жыл бұрын
yee in Latvia we have 4 numbers and 2 letters
@anzahanifathallah4 жыл бұрын
@@sharabhojha7895 yeah the format is [one or two letters]-[four numbers]-[two or three letters]
@anzahanifathallah4 жыл бұрын
@@user-dt8mf8nt2v right lol
@amolmohadikar6716 Жыл бұрын
"lets take a number completely random" proceeds to take 9!
@swarajojha30333 жыл бұрын
Michael: let's take a number completely random *"randomly" takes up a number divisible by all the digits*
@MehtehTrollfacer4 жыл бұрын
Bonus divisibility rule: To determine if something can be divided by 11, take off the last 2 digits and add them to the remaining number. Repeat until you have something that you know is divisible by 11. Ex: 35,365 353 + 65 = 418 4 + 18 = 22 = 2 × 11 Bigger ex: 6,954,035 69,540 + 35 = 69,575 695 + 75 = 770 7 + 70 = 77 = 7 × 11 Explanation: Number abc, last 2 digits are bc. abc = a × 100 + bc The operation does: (abc - bc + (100 × bc)) / 100 Essentially, you're adding 99 × bc to the number, since 99 × is always divisible by 11. However subtracting 1× and adding 100× does the same thing, so you can use that instead.
@snowfloofcathug4 жыл бұрын
Mehteh Trollfacer Thank you! Was disappointed that he didn’t show any unknown trick
@akshayreddy98924 жыл бұрын
Simpler method: Add the 1st, 3rd, 5th ........ digits together and the 2nd, 4th, 6th digits together and subtract the two. If you get a multiple of 11 or 0, it is divisible by 11. Ex- 35,365 Sum of odd digits = 3 + 3 + 5 = 11 Sum of even digits = 5 + 6 = 11 Difference = 0 Therefore divisible by 11
@sanyalox014 жыл бұрын
I have a more interesting trick. Just substract the last digit from the rest of the number. If the result is divisible by 11, then so is the original number. Ex. 35365 3536-5=3531 353-1=352 35-2=33 3-3=0 0 is divisible by any number except itself, so it's obviously divisible by eleven, and so is 35365
@MsMangoChan4 жыл бұрын
@@sanyalox01 this entire thread is golden, amazing