Sunday 17 December 2017

How to find the cube root of the Numbers within 3 seconds

Easiest and Shortest way to find the Cube Root


Define Cube Root ?

      Cube Root is the Number Which is the Multiple of same number three times to get it.

Example 1:

4 X 4 X 4 = 64


Here, 64 is the Cube value 

4 is the Cube Root of 64.


Example 2:

7 X 7 X 7 = 343

Here, 343 is the Cube Value

7 is the Cube Root of 343.

General way to find it is:

         Using the L.C.M to find the Cube Root 

  • First find LCM  a value of the Given Number
  • Then taking it out with the three repeated Number
  • Then Muliply the Resultent Number To get the Cube Root Number.


Example 1:

what us the Cube Root of  64

          3⎷64




2ட64
2ட32
2ட16
2ட8
2ட4
2ட2

          3⎷64 = 3⎷2 X 2 X 2 X 2 X 2 X 2  = 2 X 2 X 2
                
              3⎷64 = 8


Hence Cube Root of 64 is 8

Example 2:

 what is the Cube Root of  343


         3⎷343  




7ட343
7ட49
7ட7


 3⎷343  =  3⎷ 7 X 7 X 7  = 7


Hence Cube Root of 343 is 7



In the case of larger numbers like 9,70,299  6,36,056

There was a Trick to find a Cube roots Easily with in the 3 seconds:





First we want to memorize This Table


Cube Root Cubed Values
1 3 1
3 8
327
364
3125
3216
3343
3512
3729
10 31000


For Example Take 6,36,056

  1. See the last digit in the  Cubed Values, Which was 6
Which is the Last Digit of the Cube root value

3216

We have to memories this in another way

  Last Digit is same for  1,4,5,6,9,0 
  Flips for 2 & 8,  3 & 7

2. Then Omit last Three digits and find the nearest Cube root for the remaining

The remaining Numbers are 636 - The Nearest Cube Root is 8

It is the First Digit of the Cube Root Value

Hence it was the result

Cube Root of 636056 is 86

 3⎷6,36,056 = 86   
 Now you learned it 

If  you have any doubt ask it in comment

No comments:

Post a Comment

Popular posts

Featured post

Binomial distribution with example

What is Binomial Distribution     Binomial Distribution is also called as Bernoulli's Distribution. Let X be Binomially Distributed w...

Disqus Shortname

designcart

Comments system

[blogger][disqus][facebook]