Truly an underrated video. Went through so many videos trying to find a trick that is not complicated but they all had such complex methods This method would be really helpful in approximation questions.
This trick is only usefull for the 30,31,32,32,41,42,43,51,52,53,54 and so on because the difference between cube of 61 to 62 is 11000 approximate but difference between cube of 65 and 66 is approximate 13000...........and if we increased the number the diferenc eis also increased .....thanks
Finally entered in to the one of the best community now I m not part of crowd anymore ❤❤❤❤ from 48 hours I was puzzled is there anyone who can give best approaches to cubes and I got some nector of maths 😊😊
I was searching for this topic from a very long time... But finally got ur recommendation today.... Perfectly explained... Superb confidence... Keep it up... Doing grt job ..☺️☺️👍👍👍👍👍
But how to find the answer upto decimal places...for smaller number such as 166 ? Like we know it would be between 5 and 6 but how to find it upto one decimal place. Please reply
In 2nd last question and also in last question if you are going ahead of 40 will be increase by 5000 But if you are going below 40 means 39 38 difference must be of 3000 as 3X^2 Plz reply me
Sir, all you are doing is find the answer to 2 digits. And to do that there is a whole lot of material you need to remember forever, which you are never going to do. (So even if you do this method you are never going to do it in 3 seconds.) In the real world of calculation, 2 digit accuracy doesn't suffice. Perhaps numbers rounded correctly to 4 digits might. (The industrial/beginning space age was done with sliderules -- 3 digit accuracy) Do you realize that to work out the cube root of any number to 4 digits using the "long division method" takes all of 2.5 minutes, and is 100 times as accurate as 2 digits? And to evolve it to seven digits takes 9 minutes. Whats more, to evolve it to your 2 digits takes all of 15 seconds, but gives you the option of taking it as far as you like.
how can we be sure when the question contains options of three number like in last example 38. something and like that kindly explain how to guess in points because now every question paper has options which differ in points example 38.7775,38.9992 etc so by this method we will only be able to guess the numbers before the decimal.
If we see there is a difference of 7000 between 10 ka cube and 20 ka cube.. so according to 3x square concept there should be gap of approximately 300 between every cube after 10 whixh is true for first 2-3 numbers.. but after that gap keep on increasing drastically.. how you will justify that ?
Can anyone find the Remainder Rule of divisor 7? I discovered for all the rest till 11. Remainder Rules were derived by me from divisibility rules but are much better than them as the remainder gets identified (cross-checked). They're there in my facebook post of 5-6-21
round off the last 3 digits.. so the no. becomes 3955000.. now find the cube root of 3955 which is approx. 16 because 16 cube is 4096.... And then add a zero for the three zeroes that r there in the end .. so the ans. would be 160 approx
All he is doing is finding roots to 2 digit accuracy. Not too useful. The "normal" method is the "long division" method and can evolve to 2 digits in 15 seconds, to 4 digits in 2.5 minutes and to 7 digits in 9 min. Plus, no one is going to remember the stuff you need to remember for his method, so no one is going to do it in 3 seconds, after 3 weeks or 3 years from now.
This is something derived from calculas. So if you need to find fourth root of any number use 4x^3 concept. This can be generalised. As Bala did in 2x concept. Thanks
Outstanding. Finally someone shows this. Based on the fact that (x+1)^3 = x^3+3x^2+3x+1, ignoring the smaller 3x + 1 terms.
Truly an underrated video. Went through so many videos trying to find a trick that is not complicated but they all had such complex methods This method would be really helpful in approximation questions.
This trick is only usefull for the 30,31,32,32,41,42,43,51,52,53,54 and so on because the difference between cube of 61 to 62 is 11000 approximate but difference between cube of 65 and 66 is approximate 13000...........and if we increased the number the diferenc eis also increased .....thanks
Finally entered in to the one of the best community now I m not part of crowd anymore ❤❤❤❤ from 48 hours I was puzzled is there anyone who can give best approaches to cubes and I got some nector of maths 😊😊
I was searching for this topic from a very long time... But finally got ur recommendation today.... Perfectly explained... Superb confidence... Keep it up... Doing grt job ..☺️☺️👍👍👍👍👍
Sir please make a video on calculus
Great job sr keep it up
I never thought it could be solved so easily
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It's just amazing... Thank you......
It's a good approximation but not if we need to know the exact root. 8 is far from 7
Wow such a great explanation...and method..aur sabne toh dimag ki dahi Kar di..
Good
yesss my favourite sir Bala sir... plz .. seating arrangements.. vdeo plz....
thanks mannu :)
Very good concept for the competitive examination point of view
Unbelievable...valo laglo...
But how to find the answer upto decimal places...for smaller number such as 166 ? Like we know it would be between 5 and 6 but how to find it upto one decimal place. Please reply
Spr cool and spr good tq sir
You really out of this world
Bhai sahab ekdam easy ho gaya study karne me
Khya likha hai
Very good
What a great concept.
Thanks from the bottom of my heart.
Excellent sir
Great video
Wonderful concept sir. Thank you so much 😍😍😍😍😍😍
Superb sir 💐💐💐💐💐💐💐💐💐
You call yourself “fool’s den” 😂
This is genius taken to another godly level bro!
Well done 👍🏾
this is something really really special ❤
thank you so much sir !
make more videos 😁
ua-cam.com/video/oxO9enh5h4A/v-deo.html
Amazing Sir 😁 Thank You So Much
Sir tour method is nice but I want to know cube roots in points so please give us that video it's my request
ua-cam.com/video/oxO9enh5h4A/v-deo.html
Thank you so very much sir....it’s a wonderful and a very simplified concept...regards 😊
ua-cam.com/video/oxO9enh5h4A/v-deo.html
Really effective method 🙏🙏🙏😍😍😍😍
Amezing sir
Yes
Thank u so much sir ur concept helped me a lot for my calaculations heartly very very thank u sir☺☺☺
just amazing.
Amazing
Thanku so much for this.
Next level 🙏🙏👍
Wow! Bala sir👍
In 2nd last question and also in last question if you are going ahead of 40 will be increase by 5000
But if you are going below 40 means 39 38 difference must be of 3000 as 3X^2
Plz reply me
I too had that doubt but they are providing only approximate values.
So ans 'll be ~+.5 or -0.5 to the original value
A different but nice trick
Sir, what about valves close to multiples of 5 like 44, 66, 86, 74 etc ? Ex : cube root of 4312 ??
Mere hisab se sb k sb chutiye h cude k liye koi perfect trick ni h jo achi bhi ho
Sir, all you are doing is find the answer to 2 digits. And to do that there is a whole lot of material you need to remember forever, which you are never going to do. (So even if you do this method you are never going to do it in 3 seconds.)
In the real world of calculation, 2 digit accuracy doesn't suffice. Perhaps numbers rounded correctly to 4 digits might. (The industrial/beginning space age was done with sliderules -- 3 digit accuracy)
Do you realize that to work out the cube root of any number to 4 digits using the "long division method" takes all of 2.5 minutes, and is 100 times as accurate as 2 digits? And to evolve it to seven digits takes 9 minutes.
Whats more, to evolve it to your 2 digits takes all of 15 seconds, but gives you the option of taking it as far as you like.
😅#
how to find out cube root of 3.312??
Sir,never see anywhere like your approach,it is great,thanks sir
best concept
Sir plz make a one video in hindi language of decimal divide I realy need
Excellent concepts.... I want. .. more videos
Mind blowing.. I should say.. 👍 hat's off..
Great sir
This is amazing!!! 👍👍Thnx a lot
Thank you.
I neeeeeeeeeed more videos sir
Sir we have problems in maths like cube root of 25.43172 what to do??
ua-cam.com/video/oxO9enh5h4A/v-deo.html
Make it to rational number and then cancel and after that the remaining is the answer
Sir in first problem the difference between 74080 and 64000 is not 10,000 it is 10080. So 42³ is not 74080
It is 74088 .
Thank you sir ....
Rate of change of x³=3x²....simple differentiation application
Thank you so much sir
Sir very amazing method
Very nice✌✌✌✌✌
Good job Sir
Nice
What if we go from 59 to 60...
Should we add 7500 or subtract 11000???
sir, this concept is used to find cuberoot only ? then how to find non perfect fourth or fifth root?
how can we be sure when the question contains options of three number like in last example 38. something and like that kindly explain how to guess in points because now every question paper has options which differ in points example 38.7775,38.9992 etc so by this method we will only be able to guess the numbers before the decimal.
ua-cam.com/video/oxO9enh5h4A/v-deo.html
Thank you 😍😍😍
Very well sir
The is very nice. thank you sir.
Sir I want video on algebra
If we see there is a difference of 7000 between 10 ka cube and 20 ka cube.. so according to 3x square concept there should be gap of approximately 300 between every cube after 10 whixh is true for first 2-3 numbers.. but after that gap keep on increasing drastically.. how you will justify that ?
Perfect 👏👏
Nice Trick
thank you so much sir.....really helped in my exam
U r just using first principle
F(X+h)= hf'(X) + f(X)
F(X) = x3 and h= 1 f'(X) = 3x2
AWESOME SIR.........
very useful. sir. thank you
please find the 4500 cube root according to this method
Excellent bro
Sir OP 🙌🙌🙌
Can anyone find the Remainder Rule of divisor 7? I discovered for all the rest till 11. Remainder Rules were derived by me from divisibility rules but are much better than them as the remainder gets identified (cross-checked). They're there in my facebook post of 5-6-21
How to identify a perfect cube root first?
Amazing man!
Nice video sir...
Thanks Rituraj :)
Thank you ✔️✔️
Super great awesome
Tks
*If you are from India you absolutely know who is _ BALA_*
xllent
👍
Hare Krishna Hare Krishna Krishna Krishna Hare Hare
Hare Ram Hare Ram Ram Ram Hare Hare
Brilliant boss!!!
how to find cube root of 3955620...plz reply it creates confusion
round off the last 3 digits.. so the no. becomes 3955000.. now find the cube root of 3955 which is approx. 16 because 16 cube is 4096.... And then add a zero for the three zeroes that r there in the end .. so the ans. would be 160 approx
Fools Den Junior But here you didn't apply 3x2 method...Why so?
sir
u r genious
Do you have any trick to obtain the cube root in decimals fast?
yes.. will be posted soon
4.71 ka cube root kitna hoga?
Who is the king in this den is it u i mean the 1 who made this vedio 😄
Appreciate your efforts but seriously this is way tougher than the normal method.
normal method? which one? can u please specify?
Fools Den Junior there is a formula for finding the cube root of a non perfect square. Watched it in a video. Can't remember.
All he is doing is finding roots to 2 digit accuracy. Not too useful. The "normal" method is the "long division" method and can evolve to 2 digits in 15 seconds, to 4 digits in 2.5 minutes and to 7 digits in 9 min. Plus, no one is going to remember the stuff you need to remember for his method, so no one is going to do it in 3 seconds, after 3 weeks or 3 years from now.
I think 3x^2 come fromClass 12 error and aproximation
Cant we use this method to find out for perfect cuberoot?
Hmm
Bala sir per Bala song
64 cube is 262144 but by your method answer is 260000 will not this make difference in answer
Thank you sir
how about 20+ cube series ??
applicable for 20 + also
infact we have taken a number greater than 20 only no
This is something derived from calculas. So if you need to find fourth root of any number use 4x^3 concept. This can be generalised. As Bala did in 2x concept. Thanks