Square root in 3 seconds - math trick
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- Опубликовано: 23 мар 2015
- Finding the square root is easy for any perfect square under 100! You'll be able to calculate squares faster than ever and amaze everyone with your utter genius!
To find the square root of non perfect squares follow this link: • Square root of ANY num...
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how to work our uneven sqarue roots like 32
How to work out the square root of any number...
ruclips.net/video/PJHtqMjrStk/видео.html
Thank you 😊
tecmath adding onto Ethan, can I use the water fountain real quick?
@Ethan Perez sit Down.!
@@bonk539 yeah that's allowed
Teachers be like: "It'S NoT My WaY So It'S FaLsE!"
True
"YOU'VE GOT TO SHOW YOU WORK"
"YOU SKIPPED A STEP. WRONG!"
Math teacher here. FIrst off this is a useless skill since it only works with perfect squares. The problem with math students is not that they can do things in a different way. The problem is that learning math isn't about right answers, it's about learning how numbers and concepts inter-relate. Yeah, you gotta show your work, there is no way to verify thinking without seeing or hearing it. I can't hear you think if you aren't explaining to me. I've got to see it on paper. Answers are completely useless in this regard.
@@hastypete2 I get that, but
1. If it's not multiple choice and I get the correct answer, I shouldnt waste time showing work, especially if it's a timed test.
2. If I am showing work and skip a step because it was too simple and I did it in my head, shouldnt get points deducted or the answer wrong.
The fact that I learned this in like 30 seconds but can't learn it in school in 3 hours is amazing
I think its bcs you choose to pay attentio to this and not just a surprise class.
@@dr.zapatoso7220 ⁷⁷
7
6
,
Ý
@Sugar boi Thank gawddd! Now I don't feel alone in my life😂
@@dr.zapatoso7220 yeah technically speaking your right i read somewhere on the internet that sometimes when a certain topic is explained in a different way than the first time the students catch on to things that they missed on the first explanation
You can do it when the shcool well open and go for it.
Thank you, sir!!! At 30, I am re-teaching myself basic math, and I am learning so much more than I ever did at school from people like you.
It's never late than never 😊
🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉😢
*better@@An_Aspirant2001
whats the point of learning it if you already finished school
I am 74, this is very interesting
I've NEVER been able to do square root.... at the age of 50 I can now say I can, smiling from ear to ear! Thank you so much..... there should be maths teachers everywhere like you!!!!! 💗
whats the point of learning it if you already finished school
He/She may be a teacher
GDAY passengers! We have arrived in Melbourne, the weather is quite humid today with a bit of rain tonight. Hope you enjoy your stay and remember that the square root of 9 is 3.
PROD. July the square root of 3 is 9...
NikTessier GoalKeeping no
@@Trivelakits_store i-
no its 9 lmao
NomTime no it’s 1.73
@@Trivelakits_store dude 😂😂 you're joking, right?
This is the kind of thing that makes me love math, it's a shame that most teachers make it boring.
Not mine lol
It's a shame that teachers aren't paid enough to make it interesting** Can we start blaming the education systems and not our underpaid teachers?
It's a shame that teachers aren't paid enough to make it interesting** Can we start blaming the education systems and not our underpaid teachers?
@@realxtc fr
Exactly.
Mother was a teacher. She would not teach her kids in school, but she loved math and would teach me all the neat math ‘tricks’ at home. Made me love math too. Great video.
cool tip, thank you. As someone who has forgotten most of my secondary school math, and would just google how to solve the occasional business math problem, this is a very helpful trick even if it doesn't work for 100% of cases. 'Good enough' is good enough if you're in the everyday world and are not a scientist/engineer.
he sounds like the voice in the airplane being like “wE WiLl rEaCh cAnAdA iN 12 hOuRs”
U mean the pilot
Yeah I think they do mean the pilot cause they always say “this is your pilot speaks we will arrive at ____ in ____”
😂😂
Good to sleep
XD
You taught me what my school can’t teach me in all these years. Thanks.
Thanks. Glad to have helped.
Me with no brain finaly learning
@@yysss7124 me too😂😂
Lol i had to learn all square roots from 1-50
@@hallo8603 rip
I have searched all over the web and so far, your explanation and pace is so easy to understand. Thank you soooo much! 🤗
A quick way of finding the two matching digits in the squares of 1-9 is to only check the squares of 1-5. The other "matching" number will always be the one that when added to the first matching number, will add to 10. Example: if I had the number 1746, I would know that my last digit could be either 4 (4x4 = 1 *6* ), or 6 (6 + *4* = 10)
Thats actually really smart thanks
Am I doing something wrong? The method says the answer should be 44 but it’s actually 42?
@@LilacMorelli no. 42 squared would be 1764, not 1746. 1746 is simply not a perfect square. The example was a bit sub-optimal.
why am i only hearing this now. Im almost graduating high school. wtf.
this is wizardry btw. great concept for act.
You probably still need college don't you?
@@thelaurelwreathismine4805 i mean he get his high school life not knowing this which is not so good
Girl, I'm in Uni and just finding it out haha
Better late than never ;)
But yeah. Some people can just teach better.
And this guy in the video is one of the best in my opinion. And this is the first video I've watched of his.. So far. 😊
Well at least you passed your math classes right? Hahah
Nowadays teacher gotta be like “no work no credit” *triggered*
Drqkon Nowadays? That isn’t anything new
Work = grade.
Answers = probably copied someone or used photomath.
Answers are useless, work is what matters.
@@hastypete2 lol? who gave you your degree
@@hastypete2 that's stupid. If someone is copying or using photo math for their homework, their tests will reflect. Some people are just good at math. I am able to do several steps in my head, so I can focus more on finding the solution to the problem. I've found that taking extra time and writing every step is unnecessary, and often results in me making a tiny mistake that costs me the entire problem. Have some faith in your students, and understand that not every person is the same. Students aren't robots.
@@axlereno6215 It doesn't matter how good you think you are at doing steps in your head.
You will still only be able to solve simple questions in your head.
As soon as you get to a question which requires more thought, you are forced to write to actually get it right and understand what you do.
I did a rather easy test with a class in maths.
Question: 10 trees of width 30 cm on a row, 1m between each tree.
How far from the centre of the first tree to centre of the last tree.
Surprise surprise, the students who used this in their head was wrong in about 80% of the cases. The students that where forced to write down their solution was correct in 99% of the cases.
Ps: if you answer anything except 11.7m you are wrong.
I just retired from a long career as a math teacher. I learned many mental math tricks as a girl, and I love all of yours. I used to show your videos to my students if we had a few minutes left at the end of a period. Brilliant!!
bro thank you so much for this, I am literally moving up to high school in a few weeks and things like these I am sure will pop up everywhere.
i said 24 randomly and i think i'm the next physic twin
electric toes same, I was actually surprised
I actually guessed the answer on a random physics test i guessed 300 and i wasnt even sure if the answer sould’ve been in numbers or not
Kaby Uzumaki i sat there with my mouth open
Was one off
@@sahirw6788 me too😂😂
When my son watched this video. His friends were suprised that he can solve a big square root number very quick. Thank you very much
That’s awesome for him :)
Hole sum
aww 🥰
@@JA-bf9ph Whole Sum
@Natasha Blu its a math joke
This video was really helpful!! Usually when I'm trying to find square roots I usually use the long division method, but that's really time consuming. These steps were easy to understand and the method's quick to do. Thanks for the great video! :)
I put off watching this video for 3 or 4 years but man am I glad I watched it. So useful
When you watch math videos because of the Corona Virus
Lol
Oh no the uh oh word
@@shouryavermani8214 hlo
Ok but why 💀
@@aspen5151 wdym
Thanks Chris Hemsworth, I'm remembering this for the rest of my life.
Do you mean he sounds like Chris Hemsworth??
@@isaacjamesmusic Yes, he does.
@@isaacjamesmusic yea its a joke
I thought it sounded familiar!
it's more like Slazo with a deeper voice
Thank you so much! I've been struggling with this for so long and my teacher made it so complicated, you helped me lots Thanks!
I stared at the number thinking 'How in the world would I know the square root of that?!' And then as soon as you started explaining, I remembered I learnt this last year. I'm so glad I found this video to refresh my memories because otherwise, I would never have been able to
That’s about how long it takes to put it in my calculator
Well that's about 1/infinity of the time it takes if you can't find your calculator.
Cooper Ware You wouldn't survive calc 3.
@@spartankongcountry6799 Whatchu mean
@@samuelbrice3699 Typically in calc 3, they try to make you work without calculators.
@@spartankongcountry6799 That's evil. I got a 36 on the math act but the only reason why is cause I knew the tricks on the ti84... Not looking forward to that next year.
Whenever I come across these vids I'm always astounded by how simple and logical the methods used are and am dumbfounded as to why I was never taught this in school, good stuff.
same
because the teachers are lying to u
Which school did you go.?
I don't think schools are that different than RUclipsrs on youtube.
School was never meant for shortcut method
I learnt more from you brother than all the teachers I have met in all my life of schooling.
Great teaching technique! You helped me understand the concept. Thank you.
... and make sure you have a safe flight
Corey Scott ikr
HAHAHAHHAHAHAHAHAHAH
This is such an underrated comment
For pilots’ aptitude tests, yeah?
Yeah I’ll need it
Bro I realized I didn’t know how to find the square root I tried reading a ton of stuff till the point I started crying from feeling dumb I watched this for five minutes and learned something THANK YOU
this video MADE me cry
this is honestly amazing and I love you. I wish you were my teacher for all 13 years of my schooling. in all subjects.
Someone else tried to teach this on their YT channel and failed miserably. You DID IT!!!!
Me: *seeing number 6*
My mind: *"2 and 4"*
Me: *"24"*
And the answer showed up as 24. I'm an idiotic genius.
OMG YOU’RE A STAY TOO
😂😂😂
OMAIGOD AHAHHS
stayy
i saw the 24 when he said that it could be 4/6 so in my mind '4x6 = 24
is that it?' and it was the correct answer with the wrong equation XD
I had a hard time understanding your explanation because english is not my first language but I watched it over and over again until I finally understand it thank you 😊
i didn't get much sleep last night, put this on today to learn the things i didn't understand from the textbook and your voice was so soothing it put me to sleep immediately and i woke up to an ad on another video lol
(coming back to it later when i'm not so tired to actually learn what you're saying)
Alternative option: Memorize them all
well if you have a super-human memory be your guest
I can engrave it on my hand with incense sticks
@@warduxe If you have a superhuman giant hand to engrave up to 100 digit square roots and exponents, be my guest.
@@Qwiftly huh only 1-10 required lol
@@warduxe I can engrave a superhuman giant hand on my hand so that then I can engrave on it 100 digit numbers.
He sounds like the voice of the guy using the mic in an airplane!
MaxiMango 1O1 IFKR!! I've thinking the same thing
MaxiMango 1O1 ...the pilot?
MaxiMango 1O1 haha
MaxiMango 1O1 I thought he sounded more like Bruce the shark from Finding Nemo
"Good on ya, Mate!, Now how about the little Sheila down in front?"
In high school, my listening is very good and I can’t understand my match teacher when it comes to square root.
Now, I am in my mid 40’s and I have a slower mind but I understood everything you’ve explained and it was a piece of cake.
Thank you so much! This helps me save time of trying to come up with random numbers to get my answer!
was expecting a 3 second video, still watched the entire thing great video
I feel like ive seen u b4
@@ashborji5797 yeahhh me too... he must be the type of person who comments every day
@@ethanolcarbonyl4025 nah his profile pic is common
@@immu149 i meant the name not the profile pic
@@ethanolcarbonyl4025 well you can have the same name ig, Bob the builder kinda seems like what a lotta people would cop
i’m not looking at games or speed runs or the usual business id search, i’m watching how to do math equations. that’s pretty powerful man, good on you
No maths teacher has ever been able to make me understand something so quickly! Thank you
This is very helpful for my exams as now I can easily do square roots in seconds than doing trial and error, Thanks.
This man, legend, he starts his lesson with a G' day.
Must be a kiwi they say G'day just sayin
Like his kiwi accent and new zealand slang
He is Australian, and over here in Australia, a lot of teachers begin the lesson that way
@@bobnavonvictorsteyn9017 thought he was a kiwi, hahahah australians and zealanders are too similar
@Neda Tarrach hopefully your teacher takes on the responsibility of teaching his students how to spell lol
Why does he sound like Bob Ross of math equations, sounds so calm and in order
I've been looking for a quick way to solve these for a very long time, finally, thank you for sharing it too
i literally adore you for making that square root videos, thank you
I’ve spent my entire life trying to learn maths. And I still try. I taught maths but very special needs and my way of doing it was through fun. Games, etc. Number bonds. But at 63 I still try to challenge myself. For the young people I taught it was always about being inventive in my approach. But for me own development these tips are brilliant thank you
Great mam. I would have loved to have a maths- teacher like you when I was at school
the dislikes are from teachers who's mad because it isnt their way of solving
*who are
umm lol but that just means that teachers search up whatever they teach us so why don't we search it ourseleves
@Helal Vodka *trakcher
@@vult07 *tractor
Re57k *traitor
Wow! I absolutely HATED math in high school...now at age 75 I finally learned how to find square roots of numbers!! Thank you! It's actually fun! Sort of like knowing the 'secret' behind the magic trick! This is something my teachers never knew how to do.
Good for you! Coolest old guy.
@handiman5 congrats for your eternal life
@@BigChessFan8:12
This shows how a youtube math teacher is better & interesting math teacher than your school math teacher. Thanks
I guess me and 5+ million other people want to know this trick in maths lol
For my quizzz
Alisha 5221 yea I have exams few months later and no calculators are allowed
100th like
You can leave your answer without finding the square root, for instance, if you left your answer like √567 you would still get the mark however if the answer was √25 you would miss a mark because you can easily find the square root of that number. However, I don't know if this goes the same for you since you're a stranger on the internet...anways good luck on your exam.
No. I am a slow learner and I have been watching this for 5m+ times alone, over and over again
Why are there so many comments hating on your voice? Your voice is awesome! Australian?
Keiji Ikari AUSSIE AUSSIE AUSSIE OI OI OI
+Potato Surfer AUSSIE AUSSIE,AUSSIE AUSSIE,AUSSIE AUSSIE
MineItDude-Gaming and Trickshots OI OI OIO IO IO IOI OI OIO IO IO IO IOI OI OIO IOI O IOI OIOI OIO IO IOI I OI OIO IOI O IO IO II
He is a mathematician convict
+Keiji Ikari i'm Aussie :D
Thanks this is gonna boost me through algebra.
Just for your own knowledge, I'm at the University in Belgium, and that's not right when you said at the beginning that a square root have to be specified as positive and negative, a square root is always positive, for a simple exemple, take the square root fonction (f(x) = sqrt x) and you will see that the answer is always positive, the trick is that :
-when you say "wich number squared is equal to something", the answer is positive AND negative
-but when you say "what is the square root of something", the answer MUST BE positive
The difference is very low, but is there, and can't be unknown, but regardless of that very little and common mistake, the video is really great 👌
(sorry if my English is bad or if you had understood my com like angry or bad written, it's because I speak French, and don't really have the habits to speak English 😉
actually no, any negative number * any negative number = a positive number, for example 24*24 = 576, so sqrt(576) = 24 but -24 * -24 also equals 576 so sqrt(576) can equal -24 or +24 but its a habit to always pick the positive number instead
I am sleeping in math class but I'm watching this in my spare time.... yea seems fair to me
math class is boring, this isnt
It is
Next time my teacher says there is no way to accurately calculate a square root I’ll be sitting in the back of the class smirking and not saying anything bc I’m to shy
I sincerely doubt they said that. It can even be done by hand. There is an algorithm for it just like long division.
@@Red-Brick-Dream really? What is it?
@@minecrafting_il Square root button on my TI-89. Ha ha.
Technically it’s not actually fully accurate, so your teacher is right.
@@EXG21 ha.
Very good...I learned it within seconds here and I never knew how to solve it when I was in school....very good
I am 36 now...i was awful at math in school and I didnt understand why. It made absolutely no sense to me these formulas. They used to make my head spin and i was SOOO lost that I was afraid of asking questions . even if I did ask questions...the teachers could never help me understand so I ended up shutting up and failing all my math classes. I gave up.
But now...with youtube and Google...i realized math is incredibly beautiful and filled with patterns and proofs. I now understand WHY the hypotenuse is equal to the squares of the two sides. Thanks to you I understand how to find the square root in a way that makes sense. All the pieces are finally coming together. I am obsessed with mathematics now...and patterns. I am glad this generation has youtube and Google in a way. If they use it to understand it will greatly help.
Why don't teachers explain as good as him
exactly
They dont get paid enough.
Exactly
Um Mohamed lol not everyone is master at maths
Um Mohamed
Because teachers are suppose to explain how it’s solved and why it’s solved that way. They take the long way Idk really why but yeah. My dad is really good at math so he teaches he the easy way/straight forward way.
- "Hey Siri, whats the square root of 576 ?" - ”24”
One second. I won.
“Hey Siri, what’s the square root of 576?”
“Playing the Beatles”
@@burritoboy1012 Fair enough ; )
@@-NoneOfYourBusiness okay but did you just randomly just say 24 like i did and now want to go buy a lottery ticket?
How long does it take to ask it though
@@railgun1258 that doesn’t matter as he is talking about how quick can he work it out/calculate it and since Siri is a computer it only takes a second for it to work out. It’s like asking someone ‘what’s the square root of 5184?’ And you normally won’t consider the question as part of the persons calculation time
A friend of mine showed me this in high school, and I couldn't follow the steps. That is still true. I concluded that the only way i have to find the square root of any number in 3 seconds is to type the number in the calculator and press the square root button. That is also still true.
Found this for my sister. Why couldnt I have found it when I was in school?! This makes Math so much easier! Great video!
This is useful in specific situations. But you don't always know just by looking at a number that it is a perfect square.
+Jordan Pool burningmath.blogspot.in/2013/09/how-to-check-if-number-is-perfect-square.html
This teaches you how....its very easy! even easier than this!
+EKOOing Gaming
Gave up on that one. This was easy, how-to-check-if-number-is-perfect-square was not easy at all.
It's easy to rule out a lot of numbers by knowing that:
A perfect square always ends on 1, 4 or 9 and has an equal ten. Or it ends on 6 and has an odd ten. Or it ends on 25.
Also no number can be a perfect square unless its digital root is 1, 4, 7, or 9.
Still 925 is not a perfect square but we wont know without a calculator or more complex testing.
To be sure if you have a perfect square add these rules:
If a number is divisible by 4, its square leaves a remainder 0 when divided by 8.
Square of even number not divisible by 4 leaves remainder 4 while square of an odd number always leaves remainder 1 when divided by 8.
Total numbers of prime factors of a perfect square are always odd.
I was thinking the same thing
I was just about to comment that.
The sum of odd numbers in a sequential order is always a perfect square (Ex. 1 + 3 + 5...)
This trick works given that the number is a perfect square. Otherwise, it provides a very close estimate. Very nice.
Girisha Polzin I meant the second half of the trick, where you only look at the first two numbers. But yea, I wasn’t very clear.
This is the greatest trick ever . Thank you.
I enjoy the heck out of these tricks!
another little trick, you dont really need to memorize the square roots.. the last numbers have a ladder pattern.. up then down kinda thing.. 1 pairs with 9, 2 with 8, 3 with 7, 4 with 6, and 5 is alone
I noticed that also.
OH WOW THANK U
@@halaalnajjar1154 hahaha no problem xD
I don’t get it plz explain
@@tribalbyron2598 Like 1 and 9 both end with 1, 2 and 8 both end with 4, 3 and 7 both end with 9, etc.
Grandpa- back in my day we used to do square root like...
Me- done in 3 seconds
Grandpa- well my time has come
The future is now old man
Just reply with "Ok boomer"
Loser XD
Thanks mate. You're a hero
omg why am I just finding out about this channel...this was great!
Quarantine got me so psycho that i watch math videos at home when there isn't even a test or an online study goin on.
I wish you were my math teacher when I was in school. I would have been a very different person
This video deserves more likes so simple sp calm good examples
KEEP UP THE AMAZING AND FANTASTIC WORK MATE
Who else guessed 24 straight off?
Who else doesn’t care
who else is a dumbass
@@nomtime8943 me
NomTime me🙋🏽♀️
Same
In guessing you didnt.
I wish all the teachers explain like this every student would have ATLEAST 80% out of 100 in math
Knowing ur value of square roots in 3 seconds doesn’t do anything to help problem solve a question it just saves time u guys exaggerate too much
@@a_aw1070 explain like this
Not this specific example
Just the lesson itself
@@a_aw1070 This will Increase percentages as people (me) get fed up with long sums and just don't focus.
A_AW10 It helps in math competitions where speed matters.
@@happycreeperlol5235 math competitions have nothing to do with what we’re talking about. He said 80% in maths which means he’s talking about exams. And my reply was specifically to that not to math competitions
You’ve including me in all you’re math episodes thanks so much WAGWAN hope we can be sneaky links
Amazing, brilliant, this is so clever. Thanks
*Me finds square root in 4 seconds
Me: LIAR!
Seeing how bad your joke is, you probably wouldn't find it in 4 seconds.
@@arkancer2210 r/rareinsults
Arkancer bro chill
:) thats fun
WOW a video from 5 years ago is teaching me faster and easier than my own advanced math teacher 😭
If you're learning "advanced math," you're supposed to be well beyond basic arithmetic. They're not teaching you this stuff for the same reason a high school English teacher isn't teaching you the alphabet.
its 6 years now
❤❤❤❤❤THANK YOU SO MUCH I WAS STRUGGLING WITH MY MATH HOMEWORK JUST TRAIL AND ERRORING AND I FOUND THIS. TYSM🎉🎉🎉🎉
This will be so useful for the sat and act. They should teach us this in school
Welcome to the Square Root International Airlines!
Lol
Funny how I took a 72 question test today and I’m watching this now. RUclips algorithm is the best.
Thank you your video taught me a lot
Absolute masterpiece of a video and your voice is amazing!!
I put the video in 2x speed so now I can square root in 1.5 seconds
play this video in 2x u can then solve it in 1.5 sec mIND BlOwn 🤯
Changing the speed of the video doesn't change the speed of your thinking. moron
@@mariafe7050 hey man, there is something called a joke. You might have never heard a joke, but that comment is a joke.
maria fe r/woooosh
@@mariafe7050 r/woooosh
Favorite comment.! Well played.!!! 🤣😂🤣
Never thought I would learn something so useful from a foreigner teacher
Thnx sir you helped a lot .
Thank you this is very helpful.
I can't wait to put this skill into practice and make my math teacher jelaous
Share it with teacher and whole class: you're de hero then
Teachers : Report this video please, it is making the kid having fun with homework.
No
😂😂😂😂tru dat
YASUOO u play league? @YASUOO
a teacher wouldn't say that
XDD
Thank you so much for the tricks
thanks so much ive been looking for something this for so long
*Square root in 9:45 minutes
iDoge lmao
**idiot laugh**
35
Spicy i mean, if its only doing the trick without explanation and many examples it could be 3/4 seconds long
Spicy X
Australian Bob Ross. listen to that voice :D
Thats an amazing trick. Thanks a lot
This is a perfect example of a math trick versus math knowledge. What I like about this is that it generates interest in square roots! I think this could be push farther by thinking about extention questions like "What if we did not have a perfect square? What would happen?" We can see that if our number ended in a digit other than 1,4,5,6, or 9 then we would not have a perfect square. This is because when we multiply multi-digit numbers we start in the ones place which for perfect squares has to be the same number. This is also why we only need to know the squares for 1-9.