How do we find the Cube Root of a Large Perfect Cube? | Don't Memorise

[@prawnydagrate]

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!

[@AdityaSharma-rg2wt]

Please tell the name of the book please.

[@anonymousone3024]

Yup

[@ritikagupta626]

this really helped :))

[@wobblyorbee279]

really really helped thx

[@wobblyorbee279]

yeah what is the name of the book?

[@poissonyoung6019]

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😊

[@Nenmeu2]

Why they don't teach us this in school????

[@johnallegood4469]

Nenmeu 16 bc it's a shortcut

[@historyaddict2753]

But the cubes of 1-10 that you should know by heart make up the 3 digit cube roots.

[@KotakDhruti]

good method but how to recheck fast without use calculator.

[@patuchothe6388]

Nenmeu 16 yes bhai

[@keamorshedsoccer1382]

Nenmeu 2 I know right

[@nafsikul]

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 .

[@prajit_me]

Wt is Hons

[@nafsikul]

@@prajit_me Honours

[@awethagos2172]

One of the greatest Mathematics secrets. I thank you so much.

[@secretunknown2782]

Literally it is taught in india in 8th class bruh

[@anonymousone3024]

Well not in my school I'm frm kv

[@ronalddump4061]

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

[@ADANABDILLEBULOW]

​@@ronalddump4061really it helps

[@user-cj9mr9kc6e]

Very helpful, love from USA!

[@nittegurjar2160]

your english is excellent

[@yashkeysandvoice5872]

[6B8]梁家誠 LEUNG KA SHING agreement made

[@Technicalzakki1]

💪😉

[@Eforelite1234]

THIS IS GENUINELY GENIUS, SAVE THIS CHANNEL AT ALL COST 🗣🔥🔥

[@InfinityLearn_NEET]

Wish you could calculate Cubes & Cube Roots of large numbers in seconds? Then enroll in our full course now - infinitylearn.com/cbse-fullcourse?KZbinDME&H0l1u_xQ5o&Comment To watch more videos on middle school Algebra click here - bit.ly/MiddleSchoolAlgebra_DMYT

[@rajyalakshmi9650]

Could you say what is the secret of your animation in this video

[@priyalpanchal8620]

Such a nice teaching method

[@CreativeTechTubeOfficial]

I've been just able to solve any number's cube or square root in 2 secs!

[@nikhiljamwal6468]

If 12167 is the cube root of 23 then the cube root of 11167,13167,14167,15167.........26167 is also 23🤔🤨😐

[@dctc-_-3934]

Thank you

[@aashish3479]

This video is very nice. If all students see this video this video is very helpful for them.

[@InfinityLearn_NEET]

Thank you for your appreciation. You can be quick in maths by watching our videos on Warp Math : kzbin.info/www/bejne/oqWUd4xsn9Gao7s

[@ashwanikumar-gv6ir]

I overestimated cube roots. It's far easier than what we thought.

[@bloodylogan8262]

OI OI OI LUENI ADAE KANKE

[@secretunknown2782]

Nah you underestimated it after watching this video 😂 This trick only works upto numbers smaller then 970299

[@ashwanikumar-gv6ir]

@@secretunknown2782 yeah but I overestimated small cube roots.

[@superhero25e]

True

[@saisuhasreddy]

Same😢

[@umasurampudi5003]

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)

[@fear_less_2020]

at least it will give us an estimate.

[@adrian7468]

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

[@salma-zk8ql]

thats why the video title says “of a large perfect cube”

[@secretunknown2782]

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 😑

[@secretunknown2782]

@@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 😑

[@janaktiwari2262]

Perfect explanation

[@little_bunny882]

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.

[@sachindhumal8977]

Oooopsie

[@hardocore]

21952

[@alameen7286]

Wow really nice thank ❤❤❤

[@englishmania3271]

Seriously its awsm it saves my time a lot..😍❤

[@brc93]

Thank u so much. It really helps me a lot

[@studytimewithcommercebabaj6427]

Your teaching style is so good

[@sonakshigoswami5622]

I wish I had known this earlier! This is amazing! Thank you!

[@nufkistruff9961]

You are spreading light... So noble.

[@immanuel6139]

This is a good shortcut method this is amazing!

[@InfinityLearn_NEET]

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

[@harshitnandal1]

Thank you very much 🙂🙂

[@JazalFerran._.07]

this method is amazing i tried it right after your first explanation and couldnt believe my eyes...IT WORKED!! Thanks Dont Memorise

[@entertainerboy4630]

You are the best teacher

[@Inaflap]

"First we need to know the cubes of numbers from 1 to 10 by heart.." and this channel is called 'Don't Memorise'.

[@salumtummundi9462]

Know not memorise

[@arz3nal104]

literally anyone can easily calculate cubes upto 10 in seconds

[@hambonefakenamington69]

@@salumtummundi9462 that's just memorising with extra steps.

[@hambonefakenamington69]

@@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.

[@crafter3890]

Ladies and Gentlemen, we got 'em

[@diveshkumar8729]

your tricks are awsome. now i can do in seconds. thank you

[@vanubhatia2010]

Actually...the estimating methods for cubes is somewhat like this.......😅😅

[@diwakarmishra5440]

Me also indian and also AGREED

[@Santosh-lx9gh]

Yeah really

[@Santosh-lx9gh]

Not somewhat

[@aishwaryakonduri7933]

Yeah

[@girlsvsboyslegend3636]

I agree with you bro 😊

[@craft.14]

It's a very good method.thanks for this trick🙏🙏🙏

[@fatimafazal7675]

Oh my goodness Thank you so much! You're a lifesaver! So helpful and so easy!!

[@InfinityLearn_NEET]

Thank you very much for your appreciation and for watching Fatima. :)

[@fatimafazal7675]

Don't Memorise Not at all! :)

[@ronalddump4061]

How did this material "save your life", or for that matter help in any way?

[@fishtick_3567]

@@ronalddump4061 she/he probably had an exam

[@secretunknown2782]

@@fishtick_3567 so she was gonna suicide if she failed at exam wut an idiot

[@kianarainey3419]

thank you so much. this helped so much

[@captainanu102]

Wow I was astonished when I did this so quickly and correct...😱 Love you don't memorize!!! Great job

[@InfinityLearn_NEET]

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.🤗🤗

[@captainanu102]

@@InfinityLearn_NEET Thankyou

[@shrikantwankhade9166]

Excellent teaching skills

[@hydravedansh2729]

THANK YOU FOR LETTING US KNOW THIS TRICK. IT IS REALLY HELPFUL. THANKS AGAIN

[@InfinityLearn_NEET]

Most welcome, Hydra Vedansh! We are glad our video could help you. Keep watching and learning!! 🙂🙂

[@SHIVERS445]

Thanks😊😊😊

[@abdulkalamabr5553]

💓 thanking you , sir

[@samikhyapradhan6777]

THANK YOU VERY MUCH 👏🏻👏🏻👍🏻👍🏻

[@gowthamkrishnans8869]

Although I had learned this in school, I had forgotten it in no time.

[@granthkothari3401]

Just amazingly solved Why isn't all this taught in school ???

[@archimedesmaid3602]

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

[@toastboii]

super helpful! thank you so much :D

[@InfinityLearn_NEET]

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 : )

[@8lpha]

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🤧🤧🤧

[@Ranaranveer_Pandit]

wow this is very good i will practice this 👍👍

[@richashrivastava4168]

Well, that's great, but could you please tell that how do we solve cube roots for numbers that are imperfect cubes?

[@nasibsingh5247]

Great job well done 👍👍👍👍👍👍

[@InfinityLearn_NEET]

Thank you so much Nasib for your appreciation. We are glad that you understood the concept. You motivate us to do better. Keep watching our videos : )

[@franm47]

Great video! Very well explained

[@user-yu7td9by8s]

Wow very helpful.Make me learn easily THANKYOU 🙂

[@barkha7119]

I love this trick just bcoz of u I will top in maths thnku very much

[@POOJANAIK_D_]

I'm really thankful to you guys

[@vaishnavibalaji24]

The trick was very simple and you won't believe if I tell you something! I am able to calculate it within 5 secs🥳 Thanks a lot to Don't Memorise channel and members❤️

[@InfinityLearn_NEET]

You're most welcome Vaishnavi. We are glad that you understood the concept. For more videos, please visit our website - dontmemorise.com/

[@37rainman]

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)

[@vaishnavibalaji24]

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

[@sabiannenggalasunito6944]

thank you for the short cut, it helps me alot :D

[@searcher565]

Is this work for 33603 ?

[@theskilds]

If they taught us this in school, half of 8th grade would fly by!

[@gs336]

But not 9th

[@SujalRajput10]

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

[@sayonmondal3454]

Yes in our school it is taught in 8th

[@sariksarik2031]

This is really helpful for me... Liked this video by heart. Thankyou so much.

[@Mohitkumar-qu1sk]

this is useful for me

[@InfinityLearn_NEET]

Yay!

[@ryan2-518]

Don't Memorise what if the answer is irrational

[@ryan2-518]

tampicokid it can help on a bonus on a test but u can't use a calculator lol

[@raghunathganguly3367]

#SMRT4JOBS

[@madhubaladuvedi3581]

Love this method ❤

[@InfinityLearn_NEET]

Thank you so much Madhubala for your appreciation. We are glad that you understood the concept. For more videos, please visit our website - dontmemorise.com/

[@mdsuruzzaman2014]

Please explain how to solve the cube root of 9 digit numbers ?

[@raghubharathi1999]

super method and thank you for keeping this in you tube

[@37rainman]

Why is it a "super method"? You will never in your whole lifetime use it for anything.

[@dominiqueyokosawa7217]

I didn't fail math because of this video! :D

[@InspireTheWorld96]

Very helpful for speed maths of gov. exams... Thanks👍

[@cipherunity]

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

[@jkmahathiandjkshamitha9844]

Best trick ,Best Teacher Ever.....

[@nipunk5878]

damn awesome trick😆😆😆

[@SonuKumar-wp2hu]

Wow fantastic 😱😱😱💯💯💯💯💯💯💯💯💯 correct

[@halfbloodprince6141]

Fastest video i have ever clicked😂

[@shabitatahalramani6521]

Really awesome explaination

[@Karthik-kq8tg]

really helpful, thank you so much!

[@Topexams]

supper

[@narayanapurushotham3958]

Excellent teaching 😊😊😊

[@manimanikandan362]

for 1675??I didn't get the right answer??is there any condition some numbers??

[@InfinityLearn_NEET]

Yes Mani. go through the description of the video. It works only for perfect cubes :)

[@cipherunity]

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 ??

[@jameshumphreys9715]

@@InfinityLearn_NEET you never said perfect cube roots in the video

[@shaikghouse4501]

Is it perfect cube

[@souramitadebnath2732]

Den how we will understand that it is a perfect cube or wht???????😐

[@untilgaming6003]

Very good explation

[@InfinityLearn_NEET]

Thank you, Lokesh! Keep watching! 🙂🙂

[@mathewakash5692]

What if it's not a perfect cube number ??

[@avanthikamedhansh1574]

Then we can't get answer

[@avanthikamedhansh1574]

We may get in points...

[@avanthikamedhansh1574]

We may get in points...

[@kushagrasinghchauhan1870]

verygood

[@InfinityLearn_NEET]

Thank you :)

[@aravula]

Kushagrasingh Chauhan क,च

[@TauGeneration]

Kushagrasingh Chauhan kissass

[@husnazeba8305]

Very Nice and Understandable videos 👍👏👏

[@InfinityLearn_NEET]

Thanks a lot Nazia for the visit and your appreciation. We are glad that you understood the concept. Do support us by subscribing to our channel. 👍👍

[@indumathimohan6299]

I'm a commerce student it is easy to understand Maths

[@InfinityLearn_NEET]

Awesome :)

[@lataadhikari7436]

No one really cares

[@saindhavhijsangabani4109]

thank you !!! it helped meee!!

[@roshnirawat1134]

The English teacher was intelligence

[@sudeepsingh9337]

Incredible , who generates such interesting methods

[@mohammedsulthan1643]

How to find a cube root of a decimal number

[@ryan2-518]

//ANNONYMUS// or if the answer is irrational

[@gamingfever2.088]

Yes thats what i needed So i came here....... BUT THEY DIDN'T COVERED THAT TOPIC

[@deepika.k9535]

Superb trick ,amazing👌👌👌👌👌

[@JDI007x]

Don't memorise: you have to memorize cube of 1 to 10.

[@tanveertandon4832]

Thanks very easy method . It saves a lot of time .

[@InfinityLearn_NEET]

It's my pleasure. 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 : )

[@FlipFlopSaber]

I tried it on 5149 but the ans is wrong plz sole cube root of 5149

[@winonalim5659]

Glen Dsuza the amswer is 59,i have a trick on that

[@ubgrad68]

Trick works for whole numbers, not ones with numbers to the right of the decimal point.

[@sukhpreetkaur1277]

Winona Lim plzz give the trick for that

[@duratyy]

is 19 the answer?

[@void9720]

19^3=6859. 17.2679572 is an approximation, but most mathematicians would refer to it as the cube root of 5149.

[@tamilamuthu8521]

Thank you Its very easy

[@Ajaykumar-oe4mr]

V v v v v good

[@shubhampanwar6689]

Sir/ Madam by your method the cube root of 166666 is coming wrong.

[@InfinityLearn_NEET]

Hi Shubham, this method works only for cube roots of perfect cubes :)

[@catherinele6372]

you wrote the devil's number ( triple six )

[@37rainman]

+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

[@hunterp913]

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

[@saimittapalli9668]

Perfect,thankyou soooo much

[@NimishGupta2094]

how to find cube root of a large non perfect cube

[@BOBO-wq9mx]

ravi badiger 😹😹😹

[@Adnan_Khan__111]

ravi badiger so u can take it in examination hall.?

[@hunterp913]

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.

[@jameshumphreys9715]

By using the Babylonian method, a non scientific calculator, and paper and pen, to check an answer use Google or a scientific calculator.

[@sureshbhaskar8690]

Very good explanation

[@kanujogi5128]

bakwass hai..we doesn't find all the cube roots of few no.

[@gslakshmi5533]

It's very easy to find cube roots

[@prabjootsinghgaming2327]

Thanks for this great trick

[@randomaman5594]

Its so easy 😄😄 Thank you 😊

[@D__MaheshwarMishra]

I can't thank you enough!!! May God bless you the most!!!😇

[@InfinityLearn_NEET]

You're most welcome Maheshwar. We are glad that you understood the concept. For more videos, please visit our website - dontmemorise.com/

[@pedamallumark7555]

superb thanks very useful

[@NeoTech24H]

Best trick for one paper exams ,thankyou

[@lexi_2021]

Amazing. Very helpful. Thank you very much.

[@sejaldhoke4502]

Thank you Mam so much that because of you I am able to understand that how to find out cube root........👌👌👌👌🙏😇

[@shahkhan1101]

Awesome keep on your nice teaching method.

[@essaisakthi4538]

U are amazing....,thanks for the trick😊

[@jannashifa9596]

Wow! really It works! 🤩Really, I was find the answer in just 5 seconds! 🤩🤩 Awesome!... THANK YOU SO MUCH....🤩😀👍🏻

[@arpitakesh4035]

Thanks it's very simple and helped me a lot

[@InfinityLearn_NEET]

You're most welcome Arpita. We are really happy to hear that it was helpful for you. We are glad that you understood the concept. Do support us by subscribing to our channel. 👍👍

[@premadcosta6639]

Really very helpful 👍 thankyou so much😄