Let the answer format be X Y
Step 1:
To find Y, Note down the last digit in the given number
3 2 8 5 0 9
In this example its 9
Step 2: Now from the above table check which number cube ends in 9. In this case 93= 729. 729 is the only number which ends in 9 and it’s a perfect cube of 9. Therefore the last digit of our cube root Y = 9.
: = X_9
Step 3: In order to find X, the first digit. Consider first three digits in case of a 6 digit number.
3 2 8 5 0 9
For example, in this case its 328
Step 4: Compare the number 328 with the table given above. 328 is between 63 = 216 and 73 = 343
Step 5: Choose the lower value and that will be X. Therefore X = 6
Cube root of 328509 = 6 9