# Please tell me how to find cube root and square root of any large numbers . Easy method required

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I explain it
with an example:

Find the square root of 441 in prime factorisation method:

Step I: write the prime factorisation of 441

441= 3×3×7×7

Step II: From each pair of equal factors occuring in the prime factorisation, take one of the factors and write the product of these factors. The product so obtained is the square root of the given number.

Thus, √441=√(3×3)×(7×7)

In the same way you can do the cube root.

Find the square root of 441 in prime factorisation method:

Step I: write the prime factorisation of 441

441= 3×3×7×7

Step II: From each pair of equal factors occuring in the prime factorisation, take one of the factors and write the product of these factors. The product so obtained is the square root of the given number.

Thus, √441=√(3×3)×(7×7)

In the same way you can do the cube root.

2 –> 8

3 –> 27

4 –> 64

5 –> 125

6 –> 216

7 –> 343

8 –> 512

9 –> 729

Once you memorize this list, the next step is to remember the last digit (unit digit) of each of these cubes.

1 –> 1

2 –> 8

3 –> 7

4 –> 4

5 –> 5

6 –> 6

7 –> 3

8 –> 2

9 –> 9 That’s it. Now that you have memorized the cubes of first 9 natural numbers and their unit digits, you are all set to amaze your friends by calculating cube roots within 5 seconds

HERE'S an EXAMPLE forYOU: