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Shortcut to find the cube root

Cube Root

This trick will help you to find the cube roots using shortcut. Learn the shortcut with the simplified steps given below. You can calculate the cube root of numbers just by memorizing the cubes of number upto 9.

Table of cubes of numbers upto 9

1 –> 1, 2 –> 8, 3 –> 27

4 –> 64, 5 –> 125, 6 –> 216

7 –> 343, 8 –> 512, 9 –> 729

Step 1: Let us consider a cubic number 531441. To find the cubic root of 531441 follow the steps given below.

Divide the numbers in pairs of three starting from the right side. 531441 can be split as 531 and 441.

Step 2: Find the nearest smaller cube root number for the 1st part. Nearest cubic root of 531 is 512, which is 8 cube. So the first part of the answer is 8.

Step 3: Take the second part. Look at the last digit of the second part. Here its 1. Find the number in the above table which has 1 as the last digit. The result is 1. So the second part of the answer is 1. So Cube root of 531441 is 81.

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