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Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

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This problem has been shared millions of times on Twitter/Facebook with the claim "99% fail" to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people believe to be the correct answer. I also show how this answer is logical for other patterns seen in the puzzle.
Update Oct 2022: Everyone is talking about if 9=90, 8=72, then 3= answer puzzle. You can approach it in the same way as this video--the different methods will converge to the same answer with the "missing line" idea.
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Опубликовано:

26 авг 2024

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Комментарии : 18 тыс.

@MindYourDecisions Год назад

4 million views...wow. Crazy to think this video is 6 years old. We've come a long way. Thanks to everyone that's supported MindYourDecisions. I will keep working hard to make interesting math videos.

@sujatajena267 Год назад

Love you presh❤ for your efforts. Thanks to you bro for providing quality math problems.

@jamesrehan9969 Год назад

Best math channel on youtube.

@ernestofelipoperezprado7395 Год назад

You the goat man

@Vishalkr12 Год назад

@@sujatajena267 When I saw Mind your decisions comment, i thought there must be an Indian who already have commented here. When I clicked on replies, I got you first 😊

@flappyfloppy3048 Год назад

nice

@kanklys8789 5 лет назад

Ok... Has anyone solved it just by seeing the video's thumbnail?

@casualotaku5201 5 лет назад

Yep

@Jon-pv8gr 5 лет назад

Yeah, it is easy.

@larissalyle8952 5 лет назад

Kanklys yep

@hananabdelhafeez4320 5 лет назад

Yup me

@AxyDC 5 лет назад

Yup

@znhait 5 лет назад

I am always bothered when the equal sign is abused in such a way.

@spidermain 5 лет назад

They should use an arrow instead

@arnavanand8037 5 лет назад

@Just no one like this 👉👌

@1trucxhondamov589 5 лет назад

I like 3(47), so here's my 👍🤓

@yvesnyfelerph.d.8297 5 лет назад

Mind your own damn decisions!

@christianalbertjahns2577 5 лет назад

There's already a notation for that: function notation. And they still use equal sign. Preposterous

@brianviktor8212 2 года назад

There are 3 correct patterns, however only the first one (6) does not require a reference to other values, and is therefore the best answer as it's standalone and applicable to any value. The other two answers would fall apart the moment you move the last line a bit too far down, destroying the potential/deceptive appearance of a list.

@bramvanduijn8086 Год назад

There is only one pattern, it is just written down in three different ways. a->a*(a-1) means exactly the same thing as decreasing multiplication. The same is true for decreasing subtraction it is just a bit harder to identify the relationship since you have reverse the order and to understand that multiplication is repeated addition. So going from 5 to 6 means adding 5 twice. Going from 6 to 7 means adding 6 twice. By doubling the number you are increasing the number the added value increases with by 2, because 1 doubled is 2.

@intersection7353 10 месяцев назад

Yes

@marbleWRKD 9 месяцев назад

@@bramvanduijn8086I solved it by the thumbnail

@marbleWRKD 9 месяцев назад

For people who did not understand: So, based on ⁠@@bramvanduijn8086’s variable, n=a*(a-1), 9=72 would be explained as 9*(9-1), or 9*8, which is 72. 8*(8-1) is 8*7=56. 7*(7-1) is 7*6=42. 6*(6-1) is 6*5=30. 5*(5-1) is 5*4=20. 4*(4-1) is 4*3=12. And finally, 3*(3-1) is 3*2=6. So *6 is* yes, *the answer.*

@ShadowPhoenix4798 9 месяцев назад

@@bramvanduijn8086yes, the only reason there are multiple “correct” solutions is because term 4 is missing from the problem, and people can’t seem to understand that the number before 5-1 ≠ 3

@exclibrion 3 года назад

I did the decreasing substraction method and it was still 6. The reason why people say its 12 is because they miss the 4 between 5 and 3.

@atharvadeshpande6907 3 года назад

Precisely

@youzhou3001 3 года назад

Bro the last one is 6 too because of this, they miss the 4

@Nothing-pg9qc 3 года назад

@@youzhou3001 If you include the 4 all of the methods will give you 6

@bagel7080 3 года назад

I thought it was zero, because the first number got less and less and the second ones have to be something with 0. 72 56 42 30 20 00 I don’t know if I explained it well, English is not my first language.

@hamzaleagueoflegends3144 3 года назад

Also for the final méthode they miss the 4 between 5 and 3

@blockyshapes7001 5 лет назад

2:34 they skipped 4, so this is how it should go below 5: 4 = 12 - 6 = 6 3 = 6

@hadrougali494 5 лет назад

20-4×2=12 12-3×2=6

@ComedyCapsule143 4 года назад

@youtubeaddictionplayz-gtan598 4 года назад

BlockyShapes Indeed i knew that xD

@ochacouraraka3080 4 года назад

same with the decresing multiplication

@alanconde1974 4 года назад

BlockyShapes that’s why they are wrong

@BlazeMakesGames 2 года назад

Yeah the problem with the other two answers is that they're methods purely based on the right side of the equation and completely ignore the left side, and of course as you point out they skip the fact that there's a missing 4 in the equation. The whole point of a problem like this imo is that it shouldn't matter what the final line's input is, you're supposed to be coming up with a generalized formula so that theoretically you could solve any random input using the same patterns as the existing inputs and outputs. You could generalize the "decreasing subtraction" method for example to something like Y = f(X+1) - (X*2 - 2), which is technically a generalized solution but it still requires knowing the answer to an adjacent formula. (you could of course also solve it based on f(X-1) if you wanted to work upwards instead of down). And when phrased this way, it gets you the correct answer, but it's more complicated and not very practical since you *have* to solve F(4) before you can solve F(3). So basically yeah the first solution is clearly the best and most useful one because if we thought about this kind of problem in a practical context, you'd want to create a simple generalized formula that could be applied to any input regardless of any prior inputs and outputs. Like the other two methods don't work if you need to solve for say X = 10,000 or X = -57. Or at least it would take a ton of effort. Meanwhile with the simple Y = X * (X-1) solution you can solve for any input. You could probably read into the other two answers more and try to say things like "oh well this is just representative of how some people try to take shortcuts instead of doing things properly" but I dunno if I wanna have that argument lol.

@digitlesmile2765 9 месяцев назад

Yeah like if you add that 4 every method will obviously give the same answer every time

@Velaroz 2 года назад

Here's the fun part. Those other answers might could have worked, if they remembered that 4 was a potential place in the schema that was otherwise skipped to in turn ask you what 3 was. 20-8=12 would be the correct answer for 4. Which then gets 12-6=6 for 3. The last one would've had 4x3 and then 3x2. Which means it looks just the same as the first subset anyway. Seeing it as (x)(x-1) was okay. Personally I would've just called it x^2 - x

@MWalkah 2 года назад

He makes the argument that the other answers could've worked if you insert the missing "4" line in the video.

@RabblesTheBinx 2 года назад

I mean x(x-1) and x²-x are equivalent statements (and, honestly, 9×8 is a shorter and faster problem than 9×9×-9), so...

@martinprice69 11 месяцев назад

If the 4 was supposed to be part of the equation. There would be a question mark for the 4. But there isn't. The answer is 9.

@Velaroz 11 месяцев назад

@@martinprice69 Right, obviously it not being included means that it obviously isn't meant to be in the set. But also not necessarily always the explicit case where only what is shown is included. I have seen some terribly implemented questions, be it from individual teachers, or from test-makers on things like the SAT. They implement stuff in a way that leaves room for some confusion or window of interpretation for how the question could be answered due to the written instructions on the test and how questions are written. This is often an issue because the questions for math are written by math teachers/professors, who sometimes drop the ball on ensuring full succinct clarity when it comes to language used. This is how you end up with some questions getting either multiple correct answers [if work was shown], or a question getting tossed entirely. This is normally only a question a year for things like the SAT, unless the ball got majorly dropped.

@dimitrisk8441 10 месяцев назад

@@Velaroz me, it is actually very easy. I think that probably 99% of people succeed in finding the answer to this problem, but they turned it around for click baiting per usual 😄

@stephthealmighty268 4 года назад

The only thing hard understanding is why is this vid 8 mins long

@montagemaster6388 4 года назад

Stewie -• 😂

@MonkeyWrench1 4 года назад

Because he can't explain it well enough.

@mamtashukla6593 4 года назад

Absolutely

@ElectroNeutrino 4 года назад

Because ambiguously posed problems can have multiple valid solutions.

@MisterHunterWolf 4 года назад

So simple, y = x(x - 1). How does it take that long to explain that?

@maxcross5454 5 лет назад

Pff, easy. 9=72 - false 8=56 - false 7=42 - false 6=30 - false 5=20 - false 3=3

@ashtonplays2613 5 лет назад

!?!

@7llininthedream 5 лет назад

What? No... You are trying to be smart. Just use times tables...

@7llininthedream 5 лет назад

@@pavelgabrielioan I said, stop trying to be smart :)

@yohansaldana8218 5 лет назад

@@7llininthedream Never say that,we are all made to be AWESOMEEEEEEEEEEEEEEE! Just let them get better,after all,the law of entropy doesn't refer to everything,and it's not always right. It was broken by even humans themselves.

@parthsarathidixit5648 5 лет назад

But where is 4?

@starstenaal527 Год назад

I've figured it's 6 by using the decreasing multiplication method, by adding the missing line of 4*3.

@matthewq4b 11 месяцев назад

There is no missing line. you are ASSUMING there is a missing line..... You are to find the next line ONLY with the information provided. On that basis the answer is 9... You do not get to ADD stuff to make it fit YOUR desired answer...

@starstenaal527 11 месяцев назад

@@matthewq4b mentally adding it, of course. The pattern was apparent from the previous 4 instances where the rule applies. Skipping a line would be a valid way of increasing the difficulty when designing a puzzle like this. The skip also only occurs at the last equation, where the answer is intentionally left blank, which further supports the theory.

@matthewq4b 11 месяцев назад

@@starstenaal527 Nice try but you are ASSUMING a line was skipped. With NO supporting evidence. This another case of modifying a question to suit YOUR answer.. The correct answer for the information provided is three. Any other answers requires an assumption there is additional information missing. AGAIN you ARE assuming with ZERO indication that there is missing information. That is like saying 2+2=6 and then saying that another +2 is missing so the answer has to be 6. You do NOT modify questions to suit YOUR answer. With the information provided the answer is 3 plain and simple. ANYTHING else is an assumption...

@starstenaal527 11 месяцев назад

@@matthewq4b In the examples provided, it's 9, 8, 7, 6, and 5. then the puzzle asks for 3. if you recognized the pattern, it is obvious that you have to go over 4 as well to comply with the GIVEN pattern. it is entirely possible that the puzzle creator wants you to do so. There is no information in the riddle that tells you to act as if you don't notice patterns. I have no idea what you mean with "modifying a question".

@matthewq4b 11 месяцев назад

@@starstenaal527 WRONG you are ASSUMING there is 4 =. If the multiplier counts down 7 6 5 4 the next is 3, to equal 9 as is ACTUALY shown. There is NO 4=. other than the one YOU created. Again you are changing/ modifying the question to suit YOUR answer.. And not answering what is ACTUALLY shown.. Again you are taking question like 2+2 and saying the answer is 6 and assuming another +2 is missing.... There is ZERO indication ANY WHERE in the question that there is 4= line.

@eereree 8 месяцев назад

Everyone who said 3=3: Are we a joke to you?

@ilyachu8426 3 года назад

If you're wondering why this test is so easy, remember: it was taken from Facebook.

@insmyth307 3 года назад

Answer is really 14.. and rarely anyone gets that..

@GameJeMee 3 года назад

@@insmyth307 explain....

@unova3557 3 года назад

@@insmyth307 🤨

@kingcringe6069 3 года назад

@@insmyth307 what no the answer is russia

@Alfa-uu7zb 3 года назад

@@insmyth307 14 was mine answer as well. 9=72 8=56 2*8=16 72-16=-56 5=20 3=? 2*3=6 20-6=14 In this Method it matters which number is next in the first row so if it was 4=? The answer would be 12 and after that it would still be 3=6 but not if you take 4 out.

@patrickwienhoft7987 7 лет назад

1. Create a very simple series 2. Create a picture which say 'index = value' for some indices, then leave out one or two indices and finally add 'index = ?' 3. Post it on social media 4. Congratulations, you're featured in a MindYourDecisions video now!

@ceilingfan7505 7 лет назад

Patrick Wienhöft Preach the truth.

@Pumbear 7 лет назад

Surely you need two for 69 though? 1+1=69

@lythd 7 лет назад

-14

@lythd 7 лет назад

densch123 well since i solved mine correctly according to the rules in the video that means -14=1 but wait that's not right because -14=-28 and -14=/=1 and 1=2 and 1=/=-14 so that's wrong no hate

@SandonBranderson 7 лет назад

+SpartanSpark also, if your working off of a doubling rule, it would just be positive 14, because negative and negative make positive.

@SvdSinner 2 года назад

I appreciate how you don't belittle the the people who think the answer is 12 or 9 as wrong.

@georgeholloway3981 2 года назад

There is no rationale for the "decreasing multiplication" method either. One does not have enough information to deduce that the multiplier is independent of the number on the left and instead dependent on the order of appearance in the question, which it would have to be, for the multiplier of 3 to be 3 instead of 2.

@ronaldreardon4891 2 года назад

Answer is 14 w/out invalid assumptions. See my comment.

@lentlemenproductions770 2 года назад

Correct.

@octane9150 4 года назад

I still don‘t understand why you have to be a genius to see, that the 4 is missing?!

@dagaidatis2dum2uploadvidss74 4 года назад

Octane you know that’s the trick for more harder right?

@dagaidatis2dum2uploadvidss74 4 года назад

And that will make people have many answer to wrongness

@random20000 4 года назад

Yep if u notice that and do it for all the steps again but include 4 this time then all the answers will be 6?

@jonathanapple4828 4 года назад

Ragini Omg exactly. Accounting for the four means nothing. It’s asking you to solve for three.

@illegitimatecrepe1990 4 года назад

I didn't notice the four and thought it was 9

@memesarehealthy7818 4 года назад

But the real smart people realise that 9 doesn’t equal 72 and 3 just equals 3

@PlatinumH.2 4 года назад

Sir, your İQ İS OVER 9000?!!?!??!

@dirktween244 4 года назад

As noted: Should be writen as "Produces -->", and NOT "Equals =" !

@wamzyz1239 4 года назад

Sooba Dooba It was a joke about the show called “dragon ball z”

@noahgamer4942 4 года назад

Sooba Dooba r/woooosh

@jomillen5131 4 года назад

@@thebacongodfather777 Twas a joke.

@suhaschittavajhula8427 10 месяцев назад

in the decreasing subtraction we should take, if 9, take 8 multiply with 2, subtract that from 72 and we have 56

@debbiegarcia2800 9 месяцев назад

That thumbnail is a literal mobile ad😂😂😂😂

@UltimateBargains 3 года назад

The proper representation should be: f(9) = 72; f(8) = 56; f(7) = 42; f(6) = 30; f(5) = 20; f(3) = ?

@wahid85 3 года назад

@@icecrack4579 15

@brownferter 3 года назад

@jansimacek5084 3 года назад

@@icecrack4579 yea, f(x) = x * (x-1)

@icecrack4579 3 года назад

@@jansimacek5084 yes, that is what I used.

@facemask6376 3 года назад

Not everyone listened to algebra class and this problem was an Internet thing, it is logical to assume the audience wouldn't understand that imo

@evoyjonathan 4 года назад

Me: Yeah, so the answer is 6, right? Presh: "So the most common answer is 6." *Anxiety noises*

@rallozarx4215 4 года назад

My first thought: Damn it. After the video: Now I'm just mad at every other answer.

@nicolasrobichaud-barrette238 4 года назад

Yeah but if you notice they all skip the 4 and go to the 3 and if you include the 4 in these patterns it always give 6 as an answer

@russellegge9006 4 года назад

@@rallozarx4215 nope 9

@Volkbrecht 4 года назад

The correct answer is that there isn't only one correct answer to this row. 6 is as correct as 9 because you can supply a formula by which you get to 6. If you say it's six, every one of these equations is a x (a-1). You'd need more numbers to claim that 6 is not a valid solution.

@inanemme5603 4 года назад

I used the first method of x(x-1) and got 6, but using the decreasing subtraction method I'd get this: 3=6-4 3=2

@William-Sunderland 2 года назад

Figured it out with the thumbnail, 🤣 also noticed how the other logic were actually the same just less "complete" and ignoring the skipped four in the sequence while watching the video.

@ShizuruNakatsu 2 года назад

Looked at the thumbnail for 3 seconds or less, got 6. Spent another 5 seconds confirming (9 x 8 = 72, 8 x 7 = 56, 7 x 6 = 42, etc) Seems pretty simple since I could answer AND verify my answer in under 10 seconds, but I'll watch the video now to see if I missed something.

@tassbros9559 5 лет назад

How did 99% of people fail this?

@somatia350 5 лет назад

Blue Jays Fan 31415 they missed 4

@jd-fq5zi 5 лет назад

ofc they didn't, just a bait

@MarkNante 5 лет назад

in an iq test, you have maybe 5sec for this.

@funintertainmentmusicsport6792 5 лет назад

No I am win

@poopswagtyrone7543 5 лет назад

they overthought this

@philip6419 2 года назад

Actually, recognizing the skipped number-line and adjusting to it is how the problem is solved, no matter which of the three methods are used.

@aakankshanegi6833 2 года назад

If one side of the rectangle is extended by 20% and the other arm is increased by 5%. Then find the percentage change in area? Solution pls...

@winterswarrior2064 2 года назад

@@aakankshanegi6833 So Rectangle with Sides A,B Area = AB Increase A by 20% and B by 5% 1.2A x 1.05B = 1.26AB So (1.26AB-AB)/AB = 0.26 or a 26% Increase in Area

@entitree. 2 года назад

yeah, he covers this in the video

@issamkholoud2009 2 года назад

You are assuming that the pattern applies to 4, 4 was never given, what if 4 gives a different answer then the solutions would fail

@davie53 2 года назад

what are you trying to say???

@Alfaomegabravo 2 года назад

I feel this is one of those ads that say 99% fail this and then show someone failing at something easy.

@NoodleIDK13 9 месяцев назад

I literally looked at the thumbnail for 2 seconds and was just like "6"

@memoboy4141 6 лет назад

i solved it by only looking at the thumbnail and I'm FAR from being a genius

@paulgoogol2652 6 лет назад

memo boy did you solve it with every method available? nice bro

@memoboy4141 6 лет назад

Paul Googol no, the multiplication method

@paulgoogol2652 6 лет назад

memo boy that's exactly what a genious would say.

@memoboy4141 6 лет назад

Paul Googol ok

@melindamead2242 5 лет назад

Not even joking i did the same thing

@erickarmenta3661 5 лет назад

6 is obviously the answer, other two methods still yield 6, except that they skip the line of 4 = 12

@Orrinn123 5 лет назад

lolnopound because the pattern itself literally skips 4. Do you not know what the video is about?

@Orrinn123 5 лет назад

lolnopound That’s a valid point. I would say all 3 answers are correct because they obviously all have patterns but what causes most if not all the confusion/arguments is that there’s no number 4.

@anubiszyclenon1646 5 лет назад

That line isn't even in the question at all

@Orrinn123 5 лет назад

Highfire Vortex Yeah but the other 2 methods work fine but they stop making sense when 3 stops following the pattern. Just because 4 isn’t shown doesn’t mean it shouldn’t be accounted for. Just as the numbers 10, 11, 12, 20, 37, 139 would all also work and follow the same pattern even though they were never shown

@erickarmenta3661 5 лет назад

@@Orrinn123 my man, thanks for backing me up

@quigonkenny Год назад

It's 6. The other two answers notice a pattern in the second column, but ignore the pattern in the first column. The fact that the pattern in the first column changes after 5 suggests that we're "skipping ahead" to 3. So you'd need to "skip ahead" in the second column as well, which as the second half of the video shows, would get you 6 no matter which formula you use.

@Goofyahhbird332 Год назад

"theres a fourth group of people who thinks its Abraham Lincoln"

@XDTVreloadet 7 лет назад

"Only a Genius could solve it" *solves it in 5 seconds*

@A8nton 7 лет назад

You were tired, right?

@izakj5094 7 лет назад

you must be a genius

@XDTVreloadet 7 лет назад

A8nton loled

@theaxehandle1 7 лет назад

XDTV hence why it was shared millions of times. everybody loves to pretend they're smart

@shmupshmuppewpew5260 7 лет назад

If it takes a genius to solve this, we're in serious f!$%&$ trouble.

@angelhristov9870 3 года назад

I laughed SOOO hard on the first twenty seconds of the video when he said when he said it was claimed that 99% of people can't solve it and only genuises can😆

@gabrielramos4109 3 года назад

Yeah, I was surprised. I thought my mind would change hearing the other methods but as soon as he explained them, I knew that they're flawed because of how they skip 4 on the left side. You would figure it out by just looking at the thumbnail

@AlDunbar 2 года назад

The "only x% can solve this" is a common ploy to keep people on their hooks by fanning their ego.

@winnieirhefo6579 2 года назад

@@AlDunbar yeah you are right i don't think you are a genius know because you solve the mathematic test right is just a way to make ppl feel more than the "99%" is actually simple IQ test

@bradleywalton970 2 года назад

yeah this channel always lies about facts like that

@MichaelClark-uw7ex 2 года назад

The answer is "numbers, by definition, cannot be variables."

@ClintGutho 2 года назад

This can also be solved using modular arithmetic and noticing a clear pattern that as the LHS increases, the mod we're working with increases. For example, 9 is congruent to 72 mod 63, 8 is congruent to 56 mod 48, 7 is congruent to 47 mod 35, and so on. Each time we go down, we're decreasing mod m by the amount previous -2. So, going from 6 is congruent to 30 mod 24, we subtract 9 and get 5 is congruent to 20 mod (24-9=15). So then we subtract 7 and say 4 is congruent to 12 mod (15-7=8), and finally subtract 5 to get 3 is congruent to 6 mod 3 :).

@user-fg6ro Год назад

Lost the series with Australia? Justify.

@vaidik804 Год назад

Took only a few seconds to solve from the thumbnail

@YesNO-bn3pq 4 года назад

“Only a genius solved it.” Me doing it by seeing the thumbnail: *what did you say?*

@Zenoson 4 года назад

ikr i did this in a second

@richardfeynman7491 4 года назад

Same, it's super obvious.

@epicgaming7813 4 года назад

I looked at it once in my recommended, couldn’t solve it, then it showed up again and I solved it that time instantly

@ubiquityphantom6354 4 года назад

@@epicgaming7813 same, I saw it the first time and was confused. I forgot about it and when I saw it again I figured it out instantly.

@abcyabohamoud9453 4 года назад

@@Zenoson so i

@rafaelramos3083 5 лет назад

I used the subtraction method but i arrived to 6 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, 4 = 12 and 3 = 6 why did we jump the case left side = 4?

@cavbucky 5 лет назад

Rafa Ramos he made the same mistake with the last one as well

@Knightless 5 лет назад

Rafa Ramos to trick u

@purrplaysLE 5 лет назад

3 would actually be 30, due to 6 being equal to 30

@graceharman7794 5 лет назад

Your right what happened to 4

@Fenounet 5 лет назад

@@graceharman7794 It's a trick, that's why "9" is NOT the best answer. Three answers are correct, but the best is "6". We can even add a 4th answer, which also give us "6", if we follow the substration method/logic: 6 = 30 5 = 20 (4 = 12) 3 = 6 PS: haha I only watched half of the video, it's explained in the second half.

@Glitchrat_YT Год назад

Instantly got to 6 by looking at the thumbnail

@krishivkaran5337 2 года назад

Literally the first time I was able to solve a question from this channel

@alanconde1974 5 лет назад

People are wrong when they say that the answer is twelve because it skips the number 4 when subtracting.

@user-yb8fs4el3y 5 лет назад

Alan Conde and they are wrong when saying 9 because they also skipped 4 and went straight to 3

@LupeSunglass 5 лет назад

@@user-yb8fs4el3y Actually, he factored in the 4, just didn't write it down.

@Ic1clez_ 5 лет назад

Ok, captain obvious... we all know he skipped 4. We have eyes 👀

@powerblazecool3312 5 лет назад

Yep

@juliamodrowska8350 5 лет назад

True

@AwBlanky 5 лет назад

I solved it by looking at the thumbnail, who else

@bloodytiger5641 5 лет назад

@spyro2002 5 лет назад

@patmurray5824 5 лет назад

Yes

@ArunKumar-ml6wg 5 лет назад

I also do that

@broni_boi8605 5 лет назад

Same

@worldsmostaveragemagician2246 2 года назад

Literally 2 seconds just by seeing the thumbnail

@unboundedshadow5786 Год назад

I don't know why but I saw the decreasing subtraction method but added the 4 line because of the pattern in the numbers 9, 8, 7 and so on

@iordanismygdalis1163 3 года назад

For both the second and third theory, the only difference that was really made, was that you didn’t count the amount of numbers you had to go through from 5 to 3 and explained them as if the next number decreasing from 5 was 3.

@sb_dunk 3 года назад

Yeah exactly, people that think these are the answer just need to ask themselves what the answer for "4 = ?" would be

@negitivebike3169 3 года назад

@@sb_dunk 12

@jellomiki 3 года назад

If you include the missing 4, all answers will be 6

@alexanderboukal5332 3 года назад

Exactly, I even tested all 3 methods out just to be sure. They all yield the answer of 6.

@ryze520 3 года назад

It’s only missing 3

@ryze520 3 года назад

6-3 =3

@eymannassole6162 3 года назад

But... You still need to subtract from 20 3=14

@alexanderboukal5332 3 года назад

@@eymannassole6162 Which method are you using to get that answer? And what steps did you take to get at your answer?

@giovannicorso7583 8 месяцев назад

"What's the first number of the sequence?" "1" "and the second?" "2" "the third?" "3" "what's the 19478129th then?" "I'll guess it's four"

@KuDastardly Год назад

_"99% failed to solve it."_ Moments later... _"So most people believe the correct answer is six..."_

@spinrosantipas3603 4 года назад

Both decreasing multiplication and decreasing subtraction skips the step ''4'' which would get them to the correct answer of 6. (4=20-8 and then 3=12-6) (4x3=12 and then 3x2=6 not 3x3)

@vari1535 4 года назад

He explained it which is coolio

@gabepalmer9531 4 года назад

So every method gives an answer of 6

@TenToTu 4 года назад

and it makes no sense, since the number on the left is only decreasing by 1 every time, yet the other side is always changing differently, meaning the equal sign serves no point

@Rhiannon_Autumn 4 года назад

all 3 methods are really doing the same thing. Those that get a different answer than 6 are just applying the method incorrectly.

@harryzero1566 4 года назад

@@gabepalmer9531 I don't know, but a simple reduction of the hidden multiplier by 1 gives 3 x 2 = 6

@danielmenker557 3 года назад

Took me about 5 seconds to figure it out by looking at the thumbnail lol

@becauseimapotato7599 3 года назад

Yeah same, what a great "IQ test"

@TeakOrange 3 года назад

I mean it was shared across Facebook so it was clear that the people who were going to be trying this were all over 60.

@zaliendagust1671 3 года назад

It tooks me 5s to know it is 6, but then I start to doubt it since we already know 6=30, which is contradictory...

@roopankumar3950 3 года назад

Same but I took 7 to 8 sec

@justmehithere 3 года назад

Same bc its very easy

@theyeti6258 2 года назад

Me: 'easy, it's 6.' *Presses play* 'So most people believe the correct answer is 6.'

@DetectiveDeckard Год назад

I solved this just by looking at the thumbnail. Then I worked out the other two potential answers. I then qualified my first answer using the method of adding the “4” line. I then worked out the timbre of the narrators voice. Finally, and remember this is just from the thumbnail, I figured out the meaning of life.

@trevcam6892 2 года назад

6. The number is multiplied by the next lowest number. x = n(n-1). Anyone who was taught mathematics in the traditional way of learning the times tables by heart will have recognized the pattern of numbers immediately.

@miaswapp 2 года назад

Exactly

@penman1289 2 года назад

A bit to easy, what's the point.

@mdipltd7404 2 года назад

yep

@kw1ky971 2 года назад

n²-n

@OmoriSupportsPalestine_143 2 года назад

@@kw1ky971 also works

@Ckdude100 7 лет назад

The answer is without a doubt 6. The other methods are both ignoring the 5 to 3 jump

@Nick-pu8jg 7 лет назад

Bostonzo B that was my thought too

@Nick-pu8jg 7 лет назад

Bostonzo B also the other solutions also give the answer of six by adding the missing line

@Surfboarder4 7 лет назад

Bostonzo B I did it and should have have got 6 but mucked up my calculations and got 12.

@jacksainthill8974 7 лет назад

No, the answer is 3. 3 = 3, whatever falsehoods are already written on the screen.

@purplecow3000 7 лет назад

wait 3 = 3 sounds like the hardest puzzle! It is up there with 10 = 10 and 27 = 27

@lukgaming3921 7 месяцев назад

Im 10 years old and i solved this problem without even clicking on the thumbnail 6 is the answer

@robertoclaux8654 2 года назад

This problem should be titled "Occam's razor." People are only looking for a more complicated solution because the problem went viral with taglines like 'IQ' and 'genius.' When in reality it's a simple algebra problem that most of us probably got as extra credit in high school.

@TheSandkastenverbot 5 лет назад

Both the 2nd and the 3rd solution don't make much sense because they neglect the 4=? equation.

@danoodleiscute1130 4 года назад

Yes that is the point, they do not look at the numbers but simply the next line

@jonathanbanta9456 4 года назад

No they don't

@depesci7133 4 года назад

When I saw the thumbnail, I immediately used the second method but accounted for 4, giving the answer of 5. I don’t know why other people who used the same method as me completely disregarded the pattern of decreasing by 1 on the left.

@MonkeyWrench1 4 года назад

Yeah, can't forget the missing 4.

@OfficialFedHater 3 года назад

Because it's not explained as a sequence. The four is purposefully left out, therefore it can easily be assumed to not be part of the problem. By adding it in, you're changing the variables and creating a sequence that doesn't currently exist based on the currently available information. The answer is only six if you make it six by adding '4' to the sequence to make your answer right. I don't believe any of the answers are wrong, there are good arguments for each answer.

@briandaniels7493 4 года назад

"Some say the answer is 12. Others say the answer is 9. There is a third group that says the answer is 6..." ...and still a 4th group saying 3=3 and the other expressions are incorrect and superfluous.

@kaitlynngaras3431 4 года назад

7 second riddles be like:

@PotatoSofi 4 года назад

I'm the 5th group saying "14 and I'm right"

@memerboi69.0 3 года назад

Sofia ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-40Pvi1XVm_s.html

@pcooke9865 3 года назад

@@PotatoSofi The answer is 6

@ChroniclesofTaylor2 3 года назад

The answer is 3.

@RockyJones Год назад

Does anyone know there are 2 possible answers?

@redpillnibbler4423 Год назад

No,nobody knows that.

@ichbins5138 2 года назад

What is with 14? 8×2=16 16+56=72 Or: 72-(2×8)=56 7×2=14 14+42=56 56-(2×7)=42 And then: 3×2=6 20-6=14 So I'm taking only information that are given and don't "build" and easy way in theorizing, that there must be the 4=12 and the 3×2=6

@anitagofradump5195 6 лет назад

Lol this is actually the worst "only a genius can solve this" ever. Im not tryig to say im smart but i can guarantee a lot of people noticed it in 10 seconds

@isboyle5487 6 лет назад

Probably made by Americans

@queendread4427 6 лет назад

Seriously. But IQ I tend to praise myself but I know my limits. This is so simple. It should be 6. The pattern with the other 2 doesnt care about the left side at all. If there is a pattern on one side there should be one more or less on the other.

@jackd6134 6 лет назад

I agree. I did, and I'm no genius.

@jackd6134 6 лет назад

@@isboyle5487?

@himorry1 6 лет назад

Yes, Anita, I agree. But the problem is that it's SO simple, it looks to me that no one has actually found THE SIMPLEST answer, which does exist. It is a far better answer t han any of the ones offered in the video, simpler, gets the answer more directly, gets it correct for ANY digit or for negative numbers too, in a symmetrical way, the same answers WITHOUT EVEN REQUIRING A SEQUENTIAL SERIES OF GIVEN DATA to "mine" for patterns. In short, EVERY ONE of the solutions given gild the lily totally unnecessarily. There is an even simpler, more widely applicable, and stronger solution, and you do not even need a sequence to figure it out. Just get the answers for 3 or 4 integers at random, and you can then predict what the sequence presented as a "problem" will be for every one of its lines, with more simplicity and greater applicability than any of the answers provided in the video.

@khajiitimanus7432 3 года назад

Looked at the thumbnail - isn't it just 6? Edit: Personally, I did the first method. However, the second and third methods are flawed, because they skip 4 in the sequence and don't account for it. Edit 2: I'm glad you brought up the above edit in the video.

@smartart6841 3 года назад

I did the second method and accounted for 4 and got 6

@MrSUPERDUCON 3 года назад

@Razor Face Adding a line "4" is assuming that there is a sequence 9,8,7,6,5, and THUS 4 before 3. BUT answers "12" and "9" are in fact ALSO ASSUMING that there IS a sequence (respectively 16,14,12,10,8 and 8,7,6,5,4) but that this sequence IS NOT in the first row, only in the second (the calculation one). Thus the question is: why assuming a sequence and not the other? Or you assume both, or neither... By the way, for "12" answer, everything gives 12, the "line 3" could be 0, or 1 or 2, but also 9,8,7,6,5, ... because the answer is always "20-8" whatever the beginning of the line , what's nonsense :D

@shabanaasgher6353 3 года назад

It’s 9 not 6.

@DoodleNoodle129 3 года назад

@Razor Face well ignoring 4 is clearly wrong because it gives two options, and if we are going to be taking anything by decreasing each time we need to keep it constant throughout

@beaubreau 3 года назад

Lol I said the same thing before the video was over. I was really disappointed that 4 was skipped. As if it doesn't hold value. I am like wait wait wait. Since when do we just skip sequences just because the number isn't there.

@susanjimenez5500 2 года назад

I was debating whether I should add the line for 4= or not... I was wondering if it was left out on purpose or not... so I had both 6 and 9 as possible answers depending on if we should add the row for 4= or not.

@mrmacross 2 года назад

Creating ambiguity just for a "gotcha!" and claiming there's just one right answer is the lamest sort of puzzle or brain teaser. I appreciate this channel for breaking down the various possible solutions.

@jessica-ls3tc 6 лет назад

i solved it before he finished the intro

@snitttyyy 6 лет назад

wow so smart

@sirticklebear5983 6 лет назад

Jessica I solved it when looking at the thumbnail

@tmkmdra6621 6 лет назад

Same here, really easy

@rosarah7592 6 лет назад

same lol

@powandwow750 6 лет назад

Jessica same

@KJB-46 3 года назад

Me: Sees the thumbnail and gets 6. Also me: let's waste the next 8 minute going over what it took everyone 2 seconds to figure out.

@kevenlee4011 3 года назад

The answer is 12

@larrypotaot 3 года назад

Not you

@larrypotaot 3 года назад

@@kevenlee4011 you

@MrRnpandey 3 года назад

15 answer

@Limit-lr4pz 3 года назад

Omg I agree

@bestfifamobileplayerintown2084 9 месяцев назад

3=6 , just from looking at the thumbnail, now i'm gonna dive into the video

@PixelsPirate 2 года назад

I would say 3 = 14 , no need to assume a missing line , Right number is equal to previous right number minus 2 times the left number

@houstoneuler 2 месяца назад

Finally found someone who had come up with the same solution I had. The problem doesn't state there's a missing line, and the pattern was that each subsequent line has the right-side decrease by double the amount of the left number, so the solution would be 3 = 20 - (2*3) = 14

@kris1110 5 лет назад

welcome to the comment section where everyone suddenly turns in a mathematical genius

@LupeSunglass 5 лет назад

Sorry Chris.

@kris1110 5 лет назад

@@LupeSunglass it's ok. i don't know what i did to you but i forgive you

@LupeSunglass 5 лет назад

I said sorry for all the people acting like a mathematical genius.

@vanillacokejunky 5 лет назад

i actually usually get these videos wrong or have no idea how to solve, but this one is pretty easy compared to the other problems on this channel

@catianajohnston4133 5 лет назад

Yeah! They're like, "I got this in 5 seconds"it's like they think their iq is as high as Albert Einstein!

@allegory7638 2 года назад

The left hand column decreases by 1 as it goes downward. Therefore, no reasonable basis exists to conclude that the decrease after the number 5 should be a decrease of 2, making 3 the next number in the downward progression. The "genius" solution is recognizing that 4 was left out.

@tokyo.peking 2 года назад

Answer is 14 3 =14 And logic is A=B C=D E=F Where D = F + 2*E B = D + 2*C .....

@FrogsAreGods 2 года назад

@@tokyo.peking i dont think so that also makes no sense

@tokyo.peking 2 года назад

@@FrogsAreGods I didn't ask you to think but to look. Result is ok therefore ....

@fovarberma752 2 года назад

@@tokyo.peking First, the use of the symbol "=" is retarded. Second, answer is simple: X = (X^2)-X 9 = (9*9)-9 = 81-9 = 72 8 = (8*8)-8 = 64-8 = 56 7 = (7*7)-7 = 49-7 = 42 = The Answer to The Big Question about Life, The Universe, And Everything 6 = (6*6)-6 = 36-6 = 30 5 = (5*5)-5= 25-5 = 20 _4 = (4*4)-4 = 16-4 = 12_ 3 = (3*3)-3 = 9-3 = *6* _2 = (2*2)-2 = 4-2 = 2_ _1 = (1*1)-1 = 1-1 = 0_ _0 = (0*0)-0 = 0-0 = 0_ _(-3) = ((-3)*(-3))-(-3) = 9 - (-3) = 12_

@fovarberma752 2 года назад

Recognizing 4 was left out is not genius, merely a trap to get people confused.

@bw3506 2 года назад

When I glanced at the thumbnail I came up with 9 as a quick answer but after watching the video I feel closed minded.

@stellabotato2001 2 года назад

I can't be the only one who thought of 15 because you multiply the given numbers by 6

@DarkTobias7 5 лет назад

ACTUALLY THE ANSWER IS NOT 6. IT IS 30!! ABOVE SAYS 6 = 30. So 3=6=30!!

@benni1951 5 лет назад

Thats actually the most correct thing I could have expect in the comments

@satchury722 5 лет назад

But if 6=30 then 30=6 so it doesnt matter

@iluvyoo1971 5 лет назад

It doesnt matter since 6=30 then :T

@mikeries8549 5 лет назад

Math abuse by pesh tewaker.

@angelofdeath5653 5 лет назад

That would mean 3=6=30=870 and so on, by that logic 3=infinity, so that too is incorrect

@GabrielOliveira-mh1cn 5 лет назад

You can also do it Like this: 9×9-9=72 8×8-8=56 7×7-7=42 6×6-6=30 5×5-5=20 3×3-3=6

@theangrybirds98 5 лет назад

Hashtag No name with order of operations 9*9 has to be done first. But brackets definitely help with being clear, for sure.

@SeeTv. 4 года назад

Gabriel Oliveira Your method is a^2 - a But algebra says that it's actually the same thing as a*(a-1)

@CluelessCarter 4 года назад

You do realize that the nine times table, increases by nines right? Like 9, 18, 27, 36, etc. so doing 9x9-9 is the same as 9x8. Which is literally the same as every body else, but your way is doing more work. It’s an extra step. Your multiplying a higher number just to subtract it again.

@solarfyre2136 4 года назад

@@CluelessCarter but this solution removes the dependance from the other rows, so it doesn't care about the existance of the 4=12 row.

@CluelessCarter 4 года назад

Solarfyre just do 4x3=12. For the rest 9x8, 8x7, 7x6, etc.

@8Smoker8 3 года назад

Impressive that you managed to make a 7 mins video about this ^^

@MrsMingo 2 года назад

You shorted yourself & the world 49 seconds of wasted life we'll never get back as well.

@visiblecontent7630 2 года назад

@@MrsMingo 7 min = 7x60=420 seconds how come 49 seconds?

@MrsMingo 2 года назад

@@visiblecontent7630 I take it you didn't even watch the video?? The comment I was replying to stated "Impressive that you managed to make a 7 minute video about this ^^" yet the video is actually 7 minutes AND 49 seconds long. I was merely pointing out to 8Smoker8 that they shorted themselves by 49 seconds....... You've gone & made my comment far too complicated for absolutely no reason.. Does my explanation now makes sense to you?

@rba5567 2 года назад

I saw the thumbnail and advanced it to the very end to verify my answer was correct.

@Aztonio 2 года назад

I quickly wanted to watch it in x2 speed but I was already...

@redmaxii87 4 года назад

This is actually extremely easy. I solved it just by looking at the thumbnail.

@peteryanes9339 4 года назад

Same but I watch the video just to make sure because I second guess myself alot idkwhy I do that

@morreamanha 4 года назад

wow, so smart, let me clap

@50AHenry 4 года назад

Agree. Seemed easy to me.

@Daniela-pr7rz 4 года назад

@@50AHenry the issue with this sort of problems is that some of them can have more than one pattern so just because you thought of another one than the one asking the question, doesn't mean you were wrong.

@AmmoDude 4 года назад

me too

@sreagle9998 8 месяцев назад

i’m seeing 6 off of the thumbnail

@herbie_the_hillbillie_goat 2 года назад

People keep saying the other methods "missed" 4. The fact is those methods ignored any pattern present in the first column altogether.

@spadesofhearts7714 3 года назад

It took me about 10 seconds to come up with the first answer. When he introduced the other two answers I thought I was gonna be proven wrong or something lol

@glyph7308 3 года назад

"Only a genius can find the correct answer." seems like I'mma be a genius overnight.

@helo6824 3 года назад

Yep, me too, I solved in two secs, the answer I got is 3 equals 3.

@dwightsmith4641 3 года назад

I get 3.

@tot0N 3 года назад

Ikr i am genius as well ( i wise i were damn it 😭)

@Raidas. 2 года назад

Well then "Decreasing subtraction" and "Decreasing multiplication" people, tell me what is 4=? if you dont see it it doesnt mean it doesnt exist. Thinking your way this does make sense: 9-8 8-7 7-6 6-5 5-4 3-3 if you take your way of thinking from first number you shouldnt ignore the sequance of the first number edit: well, i just watched the next half of the vid and my explanation was already explained. And way clearer i think

@Aqsticgod 11 месяцев назад

5:35 i had the same idea, it has a pattern and its skipping one line, meaning 6 is the correct answer by deductive reasoning based on the pattern presented.

@kamalKishor-jh5qu 4 года назад

9×8=72 8×7=56 7×6=42 6×5=30 5×4=20 Then 4×3=12 Hence:- 3×2=6 is a correct answer

@nailen4753 4 года назад

did it also this way

@Umbideoma 4 года назад

Also he said 12 could have been the answer but that wouldn’t follow the pattern because then 4 would equal 12 and then 3 would equal 6

@sepchannel4217 4 года назад

i did 9x9-9 = 72 8x8-8 = 56 7x7-7 = 42 6x6-6 = 30 5x5-5 = 20 3x3-3 = 6 (extra : 4x4-4 = 12 2x2-2 = 2 1x1-1 = 0 0x0-0 = 0)

@parabolaaaaa4919 4 года назад

6x5 is 30 6/2 = 3 3=15

@jdabrenica2259 4 года назад

@@parabolaaaaa4919 there is no logic on your answer lol

@moneyprintergobrr6501 3 года назад

Tbh the correct answer is "The question is full of mistakes"

@cryofpaine 3 года назад

Nah, it's a very simple problem, typical of many math problems. "Given this sequence, what is the result for this value?" The first 5 "equations" establish the pattern. Then rather than just taking the next value in the sequence, it jumps a few spots just to make it a little harder.

@Vukan.Kos. 3 года назад

Yes

@sadagusfate 3 года назад

@@cryofpaine the problem being we don't know if it works of purly arithmetically, or if it works based of the lines shown

@alex_exists 3 года назад

@@cryofpaine Yeah, I got the answer in like 2 seconds.

@hammad3180 3 года назад

This was probably the most straight forward question on this channel.

@NaThingSerious 9 месяцев назад

“But not everyone thinks 6 is the right answer” And those people we call idiots

@sonalb5505 Год назад

The answer for 3 can also be root72 as 9 = 72 9=72 3^2=72 3=root72 3=6 * root2

@StevenLandesVO 2 года назад

The issue with the decreasing subtraction and decreasing multiplication methods is that they're not consistent - they're dependent on the lines above, so if you change the order the answers also change. Ideally these things should be order independent, with the given values merely representing examples of the formula.

@MrBii03 2 года назад

Honestly the issue with the other two methods is that people don't notice that 4 was skipped. I did it by decreasing subtraction so if you notice that 4 was skipped and account for that the answer is still equal to 6. So sure it isn't a proof at the moment but it does line up.

@wizardjokes 2 года назад

No, the consistent formula for "decreasing subtraction" is a x (a + 1) - (a x 2) Which is the same as a^2 - a or a(a-1) Which is incidentally the same formula as "decreasing multiplication" and "answer is 6" The real problem is not applying the formula to 3 due to mistaking 4 for 3.

@willyolio9590 2 года назад

In any case, this entire "problem" is based on ignoring the entire definition of an equals sign. in the "function" interpretation, at least each line is a line, and the equal sign is a "function" instead of equals sign. decreasing subtraction the equals sign is nothing more than a vertical divider on the page, so i consider it the most nonsensical answer.

@jav_a 2 года назад

@@willyolio9590 yeah i agree with u

@ShayPatrickCormacTHEHUNTER 2 года назад

My solution was n=(n*n) - n, which is completely order-independent. Why was that not listed in the video? Does it have some unforeseen negatives?

@Priyanshu_Singh20441 4 года назад

99% Failed It Me after solving by seeing the thumbnail : I'm gonna redefine mathematics

@HarambaeXelonmuskfans 4 года назад

Makes a joke like this and claiming you did it doesnt line up buddy.

@DragonRaiders 2 года назад

I solved it kinda differently but got the answer 6 My method: Ok so this is the problem 9=72 8=56 7=42 6=30 5=20 3=? Ok so now I imagined another line(the missing 4 and 2) So now my problem was 9=72 8=56 7=42 6=30 5=20 4=? 3=? 2=? Ok so now you may say it's even harder but by imagining that line I have a easier solution so I found that each number is equal to it multiplied by the number below it like for example 9x8=72 ⬆️ 8x7=56 ⬆️ 7x6=42 And so on so the last one would be 4x3=12 ⬆️ 3x2=6 ⬆️ 2x1=2 And so I solved it like that

@snowball564 2 года назад

I did all 3 ways and still couldn't determine which was correct . Thank you for the answer.

@snowball564 2 года назад

@Matthew thank you

@faeb7371 4 года назад

Bruh I thought he was about to be like: but it’s actually none of those 3 it’s actually tan((sqrt3)!)^2

@ichisaskue 4 года назад

Please, no

@aayushkumar8026 4 года назад

Please explain or prove this.🧐

@yolochip4889 4 года назад

@@aayushkumar8026 r/woooosh

@yolochip4889 4 года назад

Funniest thing about this is that (sqrt3)! is undefined

@say7867 4 года назад

@@yolochip4889 r/woooosh

@williamflores2079 5 лет назад

3=6 end of story

@Gositi 5 лет назад

Yup

@zx360_ 5 лет назад

Nah 9

@ggboi7086 5 лет назад

3=3 the rest is fake news simple

@nerty7835 5 лет назад

@TheCzheng x1 = (1-✓34)/2 ≈ -2.415475... x2 = (1+✓34)/2 ≈ 3.415475...

@dalmnationtwitch7931 9 месяцев назад

I hate to burst everyones bubbles here but 3 can't equal to 6. The reason is 6 = 30.

@TaaxiCaab 2 года назад

my 7 year old daughter got this in 5 seconds

@foziajfr 6 лет назад

Took me less than a minute, 9×8=72 8×7=56 7×6=42 6×5=30 5×4=20 4×3=12

@fruity1o279 6 лет назад

Fozia Jafar exactly what I thought

@Joe-rd2pu 6 лет назад

Should not have taken u ‘less than a minute’ should have taken roughly 4 seconds

@mamijsas2381 6 лет назад

Likewise.

@doobimasada2487 6 лет назад

I was about to say that he missed the 4 when he tried it in the subtraction one. It would have left him with the correct answer in methods 1 & 2

@bruh1704 6 лет назад

Took me longer to read the question than to solve it.

@thomasjefferson3506 3 года назад

The answer is 3. 3 = 3. The equal sign has a specific meaning, and no number of preceding false statements changes that meaning.

@jurjenvanderhoek316 2 года назад

Exactly!

@SpruceOaks 2 года назад

Boom! What’s funny is all the people above saying “how can 99% of people miss this?” Yet whenever it’s posted, roughly 99% of answers are something other than 3.