Find square root of '1296'.

STEP 1 :

First we have to know about these square roots to solve the above value.
Let's say it SQUARELIST -
1² = 1
2² = 4
3² = 9
4² = 16
5² = 25
6² = 36
7² = 49
8² = 64
9² = 81
10² = 100

STEP 2 :

Now Split '1296' from the tens digit like this

VALUE ONE = 12 and VALUE TWO = 96

STEP 3 :

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

Those selected SQUARELIST are :

3² = 9 and 4² = 16

So, the first digit of the cube value will be 3.

STEP 4 :

Now we will find VALUE TWO by compareing it between the SQUARELIST and the selected square roots are.

4² = 16 and 6² = 36

Now we will find the sqare root matching with '1296' between the selected above square roots
So, the selected value is 63