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Initial thoughts: is this going to be like a bigger version of the 2n-2 trick? 2:20: is it gonna be the fibonacci trick Grime showed us? 3:53 fibs confirmed
9:26 The first digit is not always the first digit - simply because there may be a remainder when adding the first digit to the second. This is why you should work it right to left - not left to right.
This could be a great activity for a substitute teacher. The students will be impressed with the teacher. They could work together. They will be doing math. You can divide the class into small groups, have each do their 10 lines on different places on the white board while you relax. Or on paper at their desks, then transfer to the white board. (Good idea to have predrawn lines.) It's hands on, uses a good chunk of time, is impressive, and is interesting.
Choose numbers X and Y and follow the procedure for a generalized formula. The seventh number is 5X + 8Y and the total of all numbers is 55X + 88 Y for any values of X and Y. Clever.
If the sum of a set of 2 digits exceeds 9, the "write it down" method fails. However, the (X*10)+X will always work and it is easy to do in your mind..
You could do the right to left sum, lets say 156x11 . Sum the last digit with the previous one (6+5)=11, greater than 10, you got 1 to spare, now sum 5+1=6 add the 1 to spare, 7, 1 is the first digit and 6 the last one,resulting in 1716 😊
@@ryubrbr I taught new-hire programmers at IBM for over 5 years. Whenever the material got a bit boring, and the opportunity presented itself, on the board I'd add from left to right and go on as though nothing unusual had happened. I loved seeing the kids faces as they realized what I'd done.
It's a bit more complicated. As shown in the video, it's x + y + (x+y) + (x+2y) + (2x+3y) + (3x+5y) + (5x+8y) + (8x+13y) + (13x+21y) + (21x+34y) = 11(5x+8y)
@@Rando2101 I'm unable to understand whether or not you realise what you wrote is literally the fibonacci sequence or not. What k0u put is just a much simplier way than the harder method you showed...
@@lukas-0614 The fibonacci sequence works by adding the last 2 numbers, regardless of what numbers you picking it'll follow the same pattern of the 7th number being 1/10th the sum of all.
Why are some of you so mad? If the explanations are boring for you, just speed the video up. You chose to watch it, right? It's not as if your boss is ranting your brain to pieces but you can't show it or just leave. THAT is torture.
Thank you 😂 I get their point, some of them just want to see the trick, but I have performed this trick many many times, so I found it worthwhile to include advisement on the performance of the trick and how effective it can be
@@WrathofMath They're probably from TikTok. These impatient kids are outta line. They clicked on a 12 minute video so they'd have been happy to spend 12 minutes having math fly in one ear and out the other. All it is is the fact they personally aren't ever going to present any tricks, so they feel like their time is wasted when hearing that side of it. They're ungreatful entitled little whiners. Not everything has to be for you. You wouldn't know if something would interest you with no tolerance to find out. "Oh, there's a sponsor i'm not interested in. Get on with it bro!" lol
I mean this sincerely and hope you take it as constructive feedback rather than just criticism. I struggle with significant Dyscalculia which can make certain formats challenging for me to follow (especially math!!). That said, I find the topics you discuss to be super interesting. I wonder if you might consider exploring a different format for presenting in the videos. I understand the importance of hitting time markers and meeting algorithm requirements but I genuinely think a slight adjustment in your approach could further boost your exposure and improve overall audience engagement and reviews. This isn’t a sales pitch I just want to see your channel appeal to an even wider audience, including people like me. While I’m not an expert in content creating I hope this suggestion gives you some food for thought regarding alternative ways to present your material. Wishing you all the best with your channel!
When you're relaxing on a sun lounger on the shores of the Caribbean, solving a math puzzle, and some guy stands there and sprays you with a water pistol.
Mathematician: "Write down any two numbers." Audience member: "Any two? Really?" Mathematician: "Yes, anything you want." Audience member: Writes down g64 and TREE(3).
pretty good trick, thanks for the trick, by the way I will subscribe you, I knew this trick but I had forgotten about it because I had not used it for long time ,but you reminded me which is very good
I’m such a nerd. Math is so cool. When I was in high school I was the dumb ass who told my algebra teacher why do I need to know this ??? Or why do I need to know Pythagorean theory …duh I grew up to become a professional land surveyor 😂
Yeah, the trick seems a little too specific. Pick any numbers, BUT, pick them in this order....my suspicion radar just went off. Also, how does the multiply by 11 trick work when the two numbers you're adding equal double digits?
Very good trick, but the second number fir example in this case 24 need to be always the double of the first number 12?? .....or the second number can be any number?? For example the first --> 9 and the second number for example 16 or 21?? Thx
Anyone with any intelligence is going to say that the total has something to do with the 2 numbers and it is just a math trick. They may not know exactly the math involved but you are then at a disadvantage trying to disprove that.
@@michelerusconi And this trick, when used in a performance, is pretty bad. From the moment where you instruct the audience member to perform sums of the previous numbers everyone will know that you will use some kind of formula. Good tricks are those where you have no clue how the performer did it - here the way how things are rigged is just too obvious.
@@michelerusconi But you also did not say it was a bad trick, and that in my opinion was the main point of the original post - not the usage of the word „trick“ on which your reply is focusing. Since I very much agree with the OP‘s sentiment I wanted to give support to it.
Good info - thanks much - And, What possibly could make one think that ceaseless distracting repetitive background music while teaching mental math would be a good idea ?!? Why why why do people think there must be some kind of law that demands every video… documentary, tutorials, interviews, lectures, even the most serious intellectual presentation… must must must have backgrounds noise playing while the person is speaking ?
it has me beat too. I turn it off. I can watch an hour long video of a Brit handy man renovating his house. No talking, no noise, just the sound of the work. Very relaxing and he is a a genius to boot! This Yank just likes to flap his lips…Also the wavy hands!! But he is very young. However, I have tried that easy multiply by 11 method he mentions with another 3 digit number and it doesn’t work. I did it my way and also with a calculator to check the correct number. But the number I get doing it his way is way off.
Huh? I've genuinely performed this trick in literally 1 second. You look at the numbers, find the 7th (fourth from bottom) and multiply by 11. It usually takes longer than a second, but if the numbers work out nicely, 1 second is totally reasonable. If that 7th number is 432 for example, this trick will take me 1 second. There is significant set up which takes more than 1 second, but that is for the audience. The actual trick which is performed may take only a single second.
The fact that you have 21 copies of 19 is just because you chose the second number to be twice the first number. (5x + 8y, with y = 2x, is 5x + 16x = 21x.) If you chose, say, 15 and 31, the 21 trick won't work.
@antonycornell6284 wdym it doesn't work with 19 and 38? 19+38+57+95+152+247+399+646+1045+1591 = 4389 = 399*11 = 19*21*11 It wouldn't work to multiply the 1st number by 21 as mentioned above if y != 2x, but he never explicitly mentioned the 21 multiplier, or if I missed it that doesn't mean the 11 multiple doesn't work? If you pick 1 and 3 you get 29*11 = 319 which is correct, even though 1*21*11 is not correct. No clue how you got that 399*11 is incorrect
Lol, well there are several common possibilities 1) teacher 2) student wanting to amuse his friends or impress his teacher 3) everybody likes a good party trick, bully me about the 'parties' i go to to think this is a good trick if you must, but I stand my ground!
@@WrathofMathThe 1) teacher once humiliated me in front of the clasroom, saying that i hold op his lesson, but i was rehabilitated later, bcz he teached something wrong. 🤣
Probably because I've done the trick a lot, so I made remarks about the presentation of the trick and explained details about performing it outside of just the mathematics.
my thoughts exactly. typical Yankee…if you can take 20 words instead of 10 to explain something, go for it. They like to hear the sound of their own voice!
It does work, you just need to resolve any carryovers afterwards if they exist. Your 456x11 example would go 4-9-11-6, which resolves to 4-10-1-6 which goes to 5-0-1-6, i.e 5016
Considering it took me longer than a second to finish reading the first 3 numbers in the thumbnail, I have doubts You proved me wrong you goddamn MASTERMIND
1+2+...+10 is not possible if you follow the directions of the trick. If you began with 1 and 2, the next number would be 3, and the one after that 5, and then 8, 13, 21...
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This trick doesn’t work if the 2nd digit in row 7 is 9.
Initial thoughts: is this going to be like a bigger version of the 2n-2 trick?
2:20: is it gonna be the fibonacci trick Grime showed us?
3:53 fibs confirmed
9:26 The first digit is not always the first digit - simply because there may be a remainder when adding the first digit to the second. This is why you should work it right to left - not left to right.
This could be a great activity for a substitute teacher. The students will be impressed with the teacher. They could work together. They will be doing math. You can divide the class into small groups, have each do their 10 lines on different places on the white board while you relax. Or on paper at their desks, then transfer to the white board. (Good idea to have predrawn lines.) It's hands on, uses a good chunk of time, is impressive, and is interesting.
Great idea! I wish every substitute teacher would see your suggestion!
Choose numbers X and Y and follow the procedure for a generalized formula. The seventh number is 5X + 8Y and the total of all numbers is 55X + 88 Y for any values of X and Y. Clever.
I back calculated, too. 😂
Just get to it!!
right?! we know how to count to 7, no need to explain that 4 times
If the sum of a set of 2 digits exceeds 9, the "write it down" method fails. However, the (X*10)+X will always work and it is easy to do in your mind..
This helps a lot and yet makes it something to remember.
You could do the right to left sum, lets say 156x11 . Sum the last digit with the previous one (6+5)=11, greater than 10, you got 1 to spare, now sum 5+1=6 add the 1 to spare, 7, 1 is the first digit and 6 the last one,resulting in 1716 😊
@@ryubrbr I taught new-hire programmers at IBM for over 5 years. Whenever the material got a bit boring, and the opportunity presented itself, on the board I'd add from left to right and go on as though nothing unusual had happened. I loved seeing the kids faces as they realized what I'd done.
That's good math!
That it is!
ST LUCIA!?
@@DavidIsFrenchTemp that's right!
@@st-lucia omaigad
@@st-lucia #1 fan you have the best uhh idk
This was super clear and easy to understand!
Awesome!
did you create this account specifically to comment on this video
If first number is :x and second y then sum is 55x+88y and 7th number is 5x+8y
It’s pure math. X+ 2X + 3x + 5x+ 8x + 13x + 21x + 34x+ 55x + 89x = 231x, which is 11 times 21x
It's a bit more complicated. As shown in the video, it's
x + y + (x+y) + (x+2y) + (2x+3y) + (3x+5y) + (5x+8y) + (8x+13y) + (13x+21y) + (21x+34y) = 11(5x+8y)
@@Rando2101 I'm unable to understand whether or not you realise what you wrote is literally the fibonacci sequence or not. What k0u put is just a much simplier way than the harder method you showed...
@Nofearonist but what if the audience member chooses a different second number? Then it wouldn't be equal to 2x?
Why the 7th?
@@lukas-0614 The fibonacci sequence works by adding the last 2 numbers, regardless of what numbers you picking it'll follow the same pattern of the 7th number being 1/10th the sum of all.
tysm this vid was rly clear and easy to understand 😊
Glad to hear, thanks for watching!
"tysm"?
@@cheriem432
_"tysm?"_
[T]hank [y]ou [s]o [m]uch.
Yw!
(Meaning, [y]ou're [w]elcome. 🙂)
@@KatorNia Cheers!
Why are some of you so mad? If the explanations are boring for you, just speed the video up. You chose to watch it, right? It's not as if your boss is ranting your brain to pieces but you can't show it or just leave. THAT is torture.
Thank you 😂 I get their point, some of them just want to see the trick, but I have performed this trick many many times, so I found it worthwhile to include advisement on the performance of the trick and how effective it can be
@@WrathofMath They're probably from TikTok. These impatient kids are outta line. They clicked on a 12 minute video so they'd have been happy to spend 12 minutes having math fly in one ear and out the other. All it is is the fact they personally aren't ever going to present any tricks, so they feel like their time is wasted when hearing that side of it. They're ungreatful entitled little whiners. Not everything has to be for you. You wouldn't know if something would interest you with no tolerance to find out. "Oh, there's a sponsor i'm not interested in. Get on with it bro!" lol
Best thing I have done in my life is subscribing your channel
Love your content
Might be the coolest math 'trick' I've ever seen. Loved the connection to the Fibonacci sequence.
Agreed! It's a very impressive trick when performed right!
I' ll have to check it out!
3:10 .
You're welcome.
.
This is so cool. It's impossible to say how much I love numbers.
I mean this sincerely and hope you take it as constructive feedback rather than just criticism. I struggle with significant Dyscalculia which can make certain formats challenging for me to follow (especially math!!). That said, I find the topics you discuss to be super interesting. I wonder if you might consider exploring a different format for presenting in the videos.
I understand the importance of hitting time markers and meeting algorithm requirements but I genuinely think a slight adjustment in your approach could further boost your exposure and improve overall audience engagement and reviews. This isn’t a sales pitch I just want to see your channel appeal to an even wider audience, including people like me. While I’m not an expert in content creating I hope this suggestion gives you some food for thought regarding alternative ways to present your material. Wishing you all the best with your channel!
When you're relaxing on a sun lounger on the shores of the Caribbean, solving a math puzzle, and some guy stands there and sprays you with a water pistol.
I fell asleep 18 times to the third power.
You really shouldn't have put the 2nd number as a multiple of the 1st.
Why?
@@paulfrost8952 It actually made me think of one variable instead of two to understand the trick. The proof was easy enough though.
Because right away I was thinking this is just going to be some power of the first number... @@paulfrost8952
Mathematician: "Write down any two numbers."
Audience member: "Any two? Really?"
Mathematician: "Yes, anything you want."
Audience member: Writes down g64 and TREE(3).
Great Sirr❤
Thank you!
@@WrathofMath
Thank you so much sir for liking my comment and replying me
You are one of the best maths mentor I have ever seen
Love you Sir ❤️
What an interesting and well presented idea! 🇨🇦
pretty good trick, thanks for the trick, by the way I will subscribe you, I knew this trick but I had forgotten about it because I had not used it for long time ,but you reminded me which is very good
Thanks for your support!
Bloody WOW!
I’m such a nerd. Math is so cool. When I was in high school I was the dumb ass who told my algebra teacher why do I need to know this ??? Or why do I need to know Pythagorean theory …duh
I grew up to become a professional land surveyor 😂
When you said any two numbers, I immediately went to pi and e.
Yeah, the trick seems a little too specific. Pick any numbers, BUT, pick them in this order....my suspicion radar just went off. Also, how does the multiply by 11 trick work when the two numbers you're adding equal double digits?
Amazing.❤❤❤
I just learned the best trick ever by watching this video
u need blue color casio calculator to do this trick
You lost me at the second number
Very good trick, but the second number fir example in this case 24 need to be always the double of the first number 12?? .....or the second number can be any number?? For example the first --> 9 and the second number for example 16 or 21?? Thx
Second number can be anything!
@@WrathofMath 👍
I tried this with 99 and 98 to start and it didn't work, am I doing something wrong?
Yes you did something wrong
Yes. The 7th number is 1279 and the total is 14069.
It doesn't work with his shortcut for multiplying by 11. I don't think you can rely on that.
Anyone with any intelligence is going to say that the total has something to do with the 2 numbers and it is just a math trick. They may not know exactly the math involved but you are then at a disadvantage trying to disprove that.
No shit sherlock all magic tricks are just tricks, some better, some worse
@@michelerusconi And this trick, when used in a performance, is pretty bad. From the moment where you instruct the audience member to perform sums of the previous numbers everyone will know that you will use some kind of formula. Good tricks are those where you have no clue how the performer did it - here the way how things are rigged is just too obvious.
@@herzbube102 I never said it was a good trick, why are you making this point to me?
@@michelerusconi But you also did not say it was a bad trick, and that in my opinion was the main point of the original post - not the usage of the word „trick“ on which your reply is focusing. Since I very much agree with the OP‘s sentiment I wanted to give support to it.
@@herzbube102They may realise it’s a maths trick, and still not know how the trick is done.
great math! Just a thought but I think you can be a bit more concise in each of your explanations :)
I’m good at drawing a blank!
I'm good at shooting blanks!
"TH-camr accused of mathsplaining"
02:40
_... a number between 1 and 20 ..._
O.k., π.
XVIII
smart. nice
I can't believe how long it takes him to get to the point
Neurodivergent TORTURE!
Good info - thanks much - And, What possibly could make one think that ceaseless distracting repetitive background music while teaching mental math would be a good idea ?!? Why why why do people think there must be some kind of law that demands every video… documentary, tutorials, interviews, lectures, even the most serious intellectual presentation… must must must have backgrounds noise playing while the person is speaking ?
it has me beat too. I turn it off. I can watch an hour long video of a Brit handy man renovating his house. No talking, no noise, just the sound of the work. Very relaxing and he is a a genius to boot! This Yank just likes to flap his lips…Also the wavy hands!! But he is very young.
However, I have tried that easy multiply by 11 method he mentions with another 3 digit number and it doesn’t work. I did it my way and also with a calculator to check the correct number. But the number I get doing it his way is way off.
because people have a way of fcking things up unnecessarily.
@@billphilips8522 - Ha! ... sadly true -
That's cool but as soon as somebody puts a condition on it (like each number has to be the sum of the previous two numbers) you know it's b.s.
You should use your right hand. Think of it as one night stands.
The art of killing time
Nice super Mario sunshine music in the background 😂
Best Mario
Also it's just 1x+2x+3x+5x+8x+13x+21x so on, it's the fibonnaci sequence
it doesn't work with any 2 numbers. try 1 and 2 or 11 and 26 as the first two numbers 😜
Great
I wish few words and more action 🙏
EXCELLENT BRO
THANK YOU!
the real magic trick is : where did you get a PINK sharpie ?
The grocery store! I have all sorts
Playback speed 2x min.
Not possible in 1 second. It takes longer than 1 second to read and think of that many items.
Huh? I've genuinely performed this trick in literally 1 second. You look at the numbers, find the 7th (fourth from bottom) and multiply by 11. It usually takes longer than a second, but if the numbers work out nicely, 1 second is totally reasonable. If that 7th number is 432 for example, this trick will take me 1 second.
There is significant set up which takes more than 1 second, but that is for the audience. The actual trick which is performed may take only a single second.
How I wish my 15 year old son had a fraction of you knowledge 😁
So you like Super Mario Sunshine? Nice!!
Best Mario game
i picked 12 and 24 right before he did. great minds think alike???
19 * 21= 399
399* 11 = 4389 ie your times 11 trick fails
Just curious, what 2 numbers did you start with?
19 and 38. The number you multiply by 11 is 21 times the starting number
The fact that you have 21 copies of 19 is just because you chose the second number to be twice the first number.
(5x + 8y, with y = 2x, is 5x + 16x = 21x.)
If you chose, say, 15 and 31, the 21 trick won't work.
@@tcxd1164is was proving the times 11 trick doesn’t work. I was not proving a different rule.
@antonycornell6284 wdym it doesn't work with 19 and 38? 19+38+57+95+152+247+399+646+1045+1591 = 4389 = 399*11 = 19*21*11
It wouldn't work to multiply the 1st number by 21 as mentioned above if y != 2x, but he never explicitly mentioned the 21 multiplier, or if I missed it that doesn't mean the 11 multiple doesn't work? If you pick 1 and 3 you get 29*11 = 319 which is correct, even though 1*21*11 is not correct.
No clue how you got that 399*11 is incorrect
In what situation are u imaging we are going to be doing a math based magic trick lol
Lol, well there are several common possibilities 1) teacher 2) student wanting to amuse his friends or impress his teacher 3) everybody likes a good party trick, bully me about the 'parties' i go to to think this is a good trick if you must, but I stand my ground!
Party trick.🤡
@@WrathofMathThe 1)
teacher once humiliated me in front of the clasroom, saying that i hold op his lesson, but i was rehabilitated later, bcz he teached something wrong. 🤣
Neat trick but how is this a 12 minute video!?
Probably because I've done the trick a lot, so I made remarks about the presentation of the trick and explained details about performing it outside of just the mathematics.
I just added up the seconds.
painful
Lost my attention fast.....you must catch your audiences attention in the first 15 seconds .
Mario64 music 👏
Mario Sunshine
Too much rhubarb
Its 0387......lol
Yappity-yap introduction finally peters out at
The hell iwth it. He hasn't gotten around to it at 1:58. I'm outta here.
Misleading label!!!
A 2 min vid crammed into 12 mins. Yawn
my thoughts exactly. typical Yankee…if you can take 20 words instead of 10 to explain something, go for it. They like to hear the sound of their own voice!
ouchie finger
Niiice
omg sooooo many words
Get on with it ffs
919
2 minutes in and I already give up. get to the point
with that condition is pretty obvious and lame
It’s a very long s
cool
i got a gf wit this trick
Not surprising
Congrats!
Things never said in history of humanity 😂
12 minutes to explain something which could take 60 seconds.
Plz get to the point!
cool..
Try for example multiplying 456 by 11 using the same method he used it won’t work. It will give you 49116 while the true answer is 5016!
It does work, you just need to resolve any carryovers afterwards if they exist. Your 456x11 example would go 4-9-11-6, which resolves to 4-10-1-6 which goes to 5-0-1-6, i.e 5016
Way too much talking! Too distracting.
Too much bull… click.
too much talking
Oh for fuxache get to the point!
not very nice!
What if they select zero (0) as the first or the first two numbers?
Then all the numbers would be zero and the total would be zero. Easy to memorize and easy to add.
12 minutes to add in 1 second....true genius.....NOT!!!👎
I love your enthusiasm, but I think you should talk less and get to the point… just a suggestion of course.
Holy crap it took this guy twelve minutes to explain and do a trick that easily could have taken less than half that time. Talk about over explaining.
it's called mathsplaining
Just do the trick.
Too much talking.
I heard 10 numbers and knew what it was. I think this was on Scam School a long time ago
OMG This guy talks too much. Get to the trick already.
Well, you just skip every other number, like 36, 96, 252, 660, then 1068 the ending number since there's the odd list
Has anyone ever heard of Exel? Upgradet since 1980, but still working today! 😅😂🤣
MathS. Not math
Says who?
Considering it took me longer than a second to finish reading the first 3 numbers in the thumbnail, I have doubts
You proved me wrong you goddamn MASTERMIND
Hilarious since all you have to do is read the last three numbers (just to count up to the seventh)
What if the 7th number is 1?
Are you stupid??
Obviously you weren't paying attention because that would be fucking impossible if you followed his directions
It does not work for 1+2+...10.
1+2+...+10 is not possible if you follow the directions of the trick. If you began with 1 and 2, the next number would be 3, and the one after that 5, and then 8, 13, 21...