How to find Cube Root

To find the cube root of a number you have to keep in mind certain rules and also squares & cubes of numbers, at least 2 digit number, which are necessary. Click here. Here I will show you how to find Cube roots of numbers in seconds.

Step 1
Keep in mind cubes of numbers up to 9 from 0.

   Chart

Number	Cube	Last digit
0	0	0
1	1	1
2	8	8
3	27	7
4	64	4
5	125	5
6	216	6
7	343	3
8	512	2
9	729	9

Step 2: 

Now let’s take examples to figure out how to find cube root of any number.

1728 and 21952 are the examples. To find the cube root first of all you have to ignore last three digits. To find cube root you always have to ignore the last three digits.

Number	Ignore Last 3 digits
1728	728
21952	952

Step 3:
Now considering the number of remaining digits that is the first 1, 2 or 3 digits, we have remember the lower cube to this number. Like, 1³ = 1 for the number 1728 after ignoring 728, 2³ = 8 which is lower than 21 of the number 21952 after ignoring 952. So we select 1 and 2 for the numbers respectively.

Now notice that the last digit of 1728 or 21952 is 8 and 2 respectively which are the last digits of cubes of 2 and 8 respectively. So we take 2 and 8 respectively.