How do we find the Cube Root of a Large Perfect Cube? | Don't Memorise
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- Опубліковано 28 чер 2024
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📅🆓NEET Rank & College Predictor 2024: infinitylearn.com/neet-rank-p... This video explains how the cube roots of large perfect cubes can be found within a few seconds!
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In this video, we will learn:
0:00 Introduction
0:33 Cube Root 4 Digit Number
0:54 Cubes of Numbers from 1 to 10
4:29 Cube Root of 6 Digit Number
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#Cubes #CubeRoots #Exponents #neet2024 #infinityLearnNEET #neetsyllabus #neet2025
I remember seeing a little simpler version of this method in a math book a while ago. Basically instead of memorizing the cubes of numbers from 1-10 (although doing so would help), you just have to remember the number 2837. This is because 2 corresponds to 8 and vice versa and 3 corresponds to 7 and vice versa. If you look back at the cubes table you'll notice that for every number other than 2, 3, 7, and 8, the units' digit of the cube is the same as the units' digit of the number. So to find the units' digit of the cube, you just have to check whether the number is 2, 3, 7, or 8. If it is, then write the corresponding number (if it's 2 then write 8 and if it's 3 write 7 and vice versa) and if it isn't then write the same number. Hope this helps!
Please tell the name of the book please.
Yup
this really helped :))
really really helped thx
yeah what is the name of the book?
Why they don't teach us this in school????
Nenmeu 16 bc it's a shortcut
But the cubes of 1-10 that you should know by heart make up the 3 digit cube roots.
good method but how to recheck fast without use calculator.
Nenmeu 16 yes bhai
Nenmeu 2 I know right
このように説明されれば「確かに！」と納得できます😆
またひとつ役立つ情報を得ることができた😊
One of the greatest Mathematics secrets. I thank you so much.
Literally it is taught in india in 8th class bruh
Well not in my school
I'm frm kv
What is so great about it? It cannot be used to find, or help find, the CR of any random number you might encounter in your day to day calculations.
(You will with overwhelming likelyhood NEVER encounter a perfect cube in your calculations, and even if you did, you will never know it is a perfect cube anyway)
As a practical matter it is entirely useless
I am a student of B.sc (Hons) course ,I didn't know this easy method before watching your video !! Thanks for sharing this helpful video .
Wt is Hons
@@prajit_me Honours
Thank you SO much!!! This will come in VERY handy when I am playing Cross Figure, and the clue is something like "Cube Root of 6 Across". I now have a way to work BOTH ways to get the answer! Thanks again!
I overestimated cube roots. It's far easier than what we thought.
OI OI OI LUENI ADAE KANKE
Nah you underestimated it after watching this video 😂
This trick only works upto numbers smaller then 970299
@@secretunknown2782 yeah but I overestimated small cube roots.
True
Same😢
I wish I had known this earlier! This is amazing! Thank you!
Caution: this works only when you are asked to calculate cube roots of perfect cubes. Don't brag anywhere and fail if someone asks you cube root of 2198 and you say 12 (using this method)
at least it will give us an estimate.
Omg I was look for this answer all this time. Seems everyone was just mesmerized by this smooth was of doing perfect cubes. Based on this method the cube root of 2197 and 2677 are the same "13". Lol
thats why the video title says “of a large perfect cube”
Caution 2 : this strategy only works upto 99 cube if you use this method to calculate cubes of higher numbers than that your answer will be wrong 😑
@@salma-zk8ql nah bro only works for two digit numbers means this only works upto 99^3 after that you can’t use this method and get the right answer
For ex.
Cube of 103 =1092727
Now use this method
The answer you will get by using this method will be 143
Which is wrong 😑
Actually...the estimating methods for cubes is somewhat like this.......😅😅
Me also indian and also AGREED
Yeah really
Not somewhat
Yeah
I agree with you bro 😊
your english is excellent
[6B8]梁家誠 LEUNG KA SHING agreement made
💪😉
"First we need to know the cubes of numbers from 1 to 10 by heart.." and this channel is called 'Don't Memorise'.
Know not memorise
literally anyone can easily calculate cubes upto 10 in seconds
@@salumtummundi9462 that's just memorising with extra steps.
@@arz3nal104 that would take time and the purpose of quick calculation would collapse. Memorising them is easy tho I guess since they come up a lot while solving.
Ladies and Gentlemen, we got 'em
Seriously its awsm it saves my time a lot..😍❤
Thanks Ma'am. Tomorrow is my Final Exam of Mathematics and your method will really help me to solve the problems related to cubes and cube roots. I have also watched your video where you were teaching about how to find the square root. Thanks again.
Oooopsie
21952
THIS IS GENUINELY GENIUS, SAVE THIS CHANNEL AT ALL COST 🗣🔥🔥
Great video! Very well explained
Wow I was astonished when I did this so quickly and correct...😱
Love you don't memorize!!! Great job
Thank you so much Anukriti for your kind words. We are glad that you understood the concept. You motivates us. We love our Pi Army and would like to stay connected.🤗🤗
@@InfinityLearn_NEET Thankyou
Oh my goodness Thank you so much! You're a lifesaver! So helpful and so easy!!
Thank you very much for your appreciation and for watching Fatima. :)
Don't Memorise Not at all! :)
How did this material "save your life", or for that matter help in any way?
@@ronalddump4061 she/he probably had an exam
@@fishtick_3567 so she was gonna suicide if she failed at exam wut an idiot
Your teaching style is so good
NICE! I can't believe I didn't know this before, it actually works.
Well, that's great, but could you please tell that how do we solve cube roots for numbers that are imperfect cubes?
Thank u so much. It really helps me a lot
this method is amazing i tried it right after your first explanation and couldnt believe my eyes...IT WORKED!! Thanks Dont Memorise
Explanation given by you is very Simple and intresting
thanks for uploading this video
THANK YOU FOR LETTING US KNOW THIS TRICK. IT IS REALLY HELPFUL. THANKS AGAIN
Most welcome, Hydra Vedansh!
We are glad our video could help you.
Keep watching and learning!! 🙂🙂
The trick was very simple and you won't beleive if I tell you something! I am able to calculate it within 5 secs🥳 Thanks a lot to Don't Memorise channel and members❤️
You're most welcome Vaishnavi. We are glad that you understood the concept. For more videos, please visit our website - dontmemorise.com/
But there is no utility in being able to find the CR of a perfect cube. (Except for being a party trick, and that will wear thin VERY rapidly)
Well yeah but it's for the spontaneity. You know, sometimes it can be used in school exams and even in olympiad exams as well. And I saw this comments just now, after 4 months😅@@37rainman
Very helpful, love from USA!
Excellent teaching skills
What if it's not a perfect cube number ??
💓 thanking you , sir
Well described and very helpful thanks
thank you so much. this helped so much
lol Channel's name is "Don't Memorise", puts up a video how to do cube roots in a few seconds. One of the requirements is to memorise the cubes from 1 to 10.
That being said, nice video.
useful trick....
+moorthi adithyan 😅😅
Pagal hai kya
Are you mad
😂
Just amazingly solved
Why isn't all this taught in school ???
Because it will not be useful for anything you will do with maths in your life.
Think about it! You are doing a calculation and in it, you find you need to find the CR of 2659.8. You need to find the answer to 4 digit accuracy. Will this trick help in any way?
The answer is no -- it wont help in any way to find the answer
You are spreading light... So noble.
Thank you , it's very helpful. 😊
This is a good shortcut method this is amazing!
Thank you, Sam. Happy to know that you liked our video. 🙂
To watch more such amazing videos, get in touch with us at: bit.ly/DontMemorise_Register
Ahh finally i got the vdo of my undertanding level 🤣 ihave been really dead facing problem for this.Thanku for this vdo🥰🥰. It made me cry🤧🤧🤧
Thanks...this concept was explained very well
Perfect,thankyou soooo much
Although I had learned this in school, I had forgotten it in no time.
I love this trick
just bcoz of u I will top in maths
thnku very much
thank you for the short cut, it helps me alot :D
Is this work for 33603 ?
If they taught us this in school, half of 8th grade would fly by!
But not 9th
Uhh, even if a number is not perfect cube this method will tell us it is
Just try adding 1 to any perfect cube they gave eg for and apply their method.
So don't use it unless you are damn sure it's a perfect cube
Yes in our school it is taught in 8th
Wish you could calculate Cubes & Cube Roots of large numbers in seconds? Then enroll in our full course now - infinitylearn.com/cbse-fullcourse?UA-camDME&H0l1u_xQ5o&Comment
To watch more videos on middle school Algebra click here - bit.ly/MiddleSchoolAlgebra_DMYT
Could you say what is the secret of your animation in this video
Such a nice teaching method
I've been just able to solve any number's cube or square root in 2 secs!
If 12167 is the cube root of 23 then the cube root of 11167,13167,14167,15167.........26167 is also 23🤔🤨😐
Thank you
Woah ! I didn't know this till my master's !
Very interesting solution.I like your teaching techniques.I am also math teacher and follow your style.
damn awesome trick😆😆😆
this is useful for me
Yay!
Don't Memorise what if the answer is irrational
tampicokid it can help on a bonus on a test but u can't use a calculator lol
#SMRT4JOBS
super helpful! thank you so much :D
You're most welcome. We are glad that you understood the concept. We are happy that we could help you learn. You motivate us to do better. Keep watching our videos : )
Thank you. It helped me a lot.
supper
The trick is only applicable for a number which is a perfect cube and not for every number.
For example according to the trick, cube root of 274624 should be 64 which is not correct. 64^3 = 262144
Nice explaination
Thank you Mam so much that because of you I am able to understand that how to find out cube root........👌👌👌👌🙏😇
this method can be used only on perfect cubes if u add one number in 2197 i.e. it become 2198 even the it shows that it is a cube of 12 bt notice that the cube of 13 will never be less than 12 and actual cube of 12 is 1728... So my advise is dont use it in exams
(-_^)
I think you're right This method doesn't apply everywhere, only in perfect cube. So I'll also do this SUGGEST. Because we will apply for quick access to exams but what does it mean when it gets wrong?
Right
I agree..
I have a video explaining how to do that?It is not the best thing I did but it is my first uploaded video ever.
Yes
Please explain how to solve the cube root of 9 digit numbers ?
This is really helpful for me...
Liked this video by heart.
Thankyou so much.
Fastest video i have ever clicked😂
How to find a cube root of a decimal number
//ANNONYMUS// or if the answer is irrational
Yes thats what i needed
So i came here.......
BUT THEY DIDN'T COVERED THAT TOPIC
love this method..
This is really amazing, it saves me the time to calculate AND is easy to grasp, becuase of this trick I can attend my Math Test tommorow, Thank You! :))
I didn't fail math because of this video! :D
for 1675??I didn't get the right answer??is there any condition some numbers??
Yes Mani. go through the description of the video. It works only for perfect cubes :)
The trick is only applicable for a perfect cube. In your case the number 1675??1 is not a perfect cube. for all values of ??
@@InfinityLearn_NEET you never said perfect cube roots in the video
Is it perfect cube
Den how we will understand that it is a perfect cube or wht???????😐
Loved this method ❤️❤️❤️
Very useful to all
I'm a commerce student it is easy to understand Maths
Awesome :)
No one really cares
verygood
Thank you :)
Kushagrasingh Chauhan क,च
Kushagrasingh Chauhan kissass
Wow...this was really a good trick to save time😊
I'm really thankful to you guys
The English teacher was intelligence
V v v v v good
It's a very good method.thanks for this trick🙏🙏🙏
Amazing... Thank you so much
Thank you very much for the appreciation and for watching Dakshika. :)
how to find cube root of a large non perfect cube
ravi badiger 😹😹😹
ravi badiger so u can take it in examination hall.?
Mohammad Adnan Khan No test will ever require you to find the cube root of a large non perfect cube without a calculator. And most tests will give you a calculator.
By using the Babylonian method, a non scientific calculator, and paper and pen, to check an answer use Google or a scientific calculator.
I tried it on 5149 but the ans is wrong plz sole cube root of 5149
Glen Dsuza the amswer is 59,i have a trick on that
Trick works for whole numbers, not ones with numbers to the right of the decimal point.
Winona Lim plzz give the trick for that
is 19 the answer?
19^3=6859. 17.2679572 is an approximation, but most mathematicians would refer to it as the cube root of 5149.
It's amazing!ty
Glad you liked it, Taruna!
Please subscribe to our channel: bit.ly/DontMemoriseUA-cam
Happy Learning :)
Amazing. Very helpful. Thank you very much.
Don't memorise: you have to memorize cube of 1 to 10.
please solve this - cube root of 4094?
15.9973954
14
u r ans is 14 = unit digit is 4 no 4 remaining three numbers leavit single number is 4 so we have check 1 cube and 2 cube lower number in given place so lower number is 1 so ans is 14
The trick is only applicable for a perfect cube. In your case the number 4094 is not a perfect cube.
Thank's Don't memorize I understand this method and solved any cube root
Perfect explanation
Sir/ Madam by your method the cube root of 166666 is coming wrong.
Hi Shubham, this method works only for cube roots of perfect cubes :)
you wrote the devil's number ( triple six )
+Don't M: Your efforts should lie in teaching people to find the cube root of ANY number to any accuracy desired. (In our lives, the talent to find the cube root of a perfect cube will obviously be perfectly useless, except as a parlor trick). Now make a vid on how to find cube roots quickly and accurately. Obviously it might be a chore because children are not even being taught to add subtract and multiply properly, and likely you yourself are a product of that pathetic environment
37rainman One why are you telling her what to do, two use a calculator, three what do you mean children arent taught to add, subtract, and divide properly you sound like a dad who complains that his kid was taught a different method then him
I using this in exam
All the best :)
#DontMemorise
Ramon Lockhart I am using this too.
Concentrate on your english
Amazing. It took me 3 seconds to solve the problem. You are just amazing
Heyy.... Same here bro
I remember having a mental breakdown when I scored miserably in the UT. Wish I knew this method back then!!
Thankyou for this video
Thought it was 83
bakwass hai..we doesn't find all the cube roots of few no.
super method and thank you for keeping this in you tube
Why is it a "super method"? You will never in your whole lifetime use it for anything.
It's very easy to study it's really helpful for my studies thanks a lots for upload this video sister.
You're most welcome Lakshmi. We are really happy to hear that it was helpful to you. We are glad that you understood the concept. You motivate us to do better. Keep watching our videos : )
You are the best teacher
Your video is very brilliant and....you're like the best teacher for us..
Thank u so much😊❤
your tricks are awsome. now i can do in seconds. thank you
This is the best channel I ever come through in my life....... Your superb a big like from me 👍👍👍👍
Seriously I loved it and now I can solve it easily
Thanks ❤❤❤❤ a lot
We need this kind of teacher in school
Hi
Thank you Its very easy
Don't know whether this is vedic maths or what but it's just awesome and i loved it!!
Really awesome explaination
Incredible , who generates such interesting methods.