Cube root in just 2 second

Trick to the find the cube root up to 6 digit number

Find cube root of '531441'.

STEP 1 :

First we have to know about these cube roots to solve the above value.
Let's say it CUBELIST -
13 = 1
23 = 8
33 = 27
43 = 64
53 = 125
63 = 216
73 = 343
83 = 512
93 = 729
103 = 1000


STEP 2 :

Now Split '531441' from the hundreds like this

VALUE ONE = 531 and VALUE TWO = 441


STEP 3 :

Let's take VALUE TWO and Compare it with the above CUBELIST which we have to use to get the last value of the cube.
As you can see VALUE TWO'S 441 last digit matches the last digit of 13 = 1 and its cube root value is 1.
So, the last digit of cube value is 1


STEP 4 :

Let's take VALUE ONE and Compare it with the above CUBELIST and find out in which of the 2 CUBELIST it lies in between.

Those selected CUBELIST are :

83 = 512 and 93 = 729
So, the first digit of the cube value will be 8.

Now concatinate or join both digits and we will get the final value = 18