HOW TO FIND CUBE ROOTS ?

Solve Questions in just 5 seconds

By Entrance Exam Information

How can I solve cube roots ??

To solve the problem of cube roots, you just have to learn a simple table -

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Number Cube Last Digit1 1 12 8 83 27 74 64 45 125 56 216 67 343 38 512 29 729 910 1000 0

Learn this table & Solve Problems Quickly

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Now Note how the last digit of the cubes for 0, 1, 4, 5, 6, and 9 end with the original number.

Note how the last digits for the cubes of 2 and 8 are swapped.

Note how the last digits for the cubes of 3 and 7 are swapped.

Same numbers are 1,4,5,6,9,0

Swapped numbers are = 2,3,7,8

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How to find Cube Root

Ignore the last three digits of the number called out by the spectator and choose the

memorized cube which is just lower (or equal) to the remaining number.

The cube root of this is the first digit of your answer.

Now consider the last digit of the number called out by the spectator.

This will indicate the last digit of your answer.

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Look at the last digit = 4

Now ignore the last 3 digits = 39304

Now find the closest cube of remaining digit (39)

27 < 39 < 64

So we will take the cube of 3 which is 27. (Lower cube)

The answer is

Que 1. - Find the cube root of 39304 -

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Que 2. - Find the cube root of 830584 -

Last digit is = 4

Ignore the last 3 digits = 830584

Now check the closest cube of remaining digit 830

729 < 830 < 1000

So we will take the cube of 9 which is 729. (Lower cube)

So the answer is

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Que 3. - Find the cube root of 216000

Last digit is = 0

Ignore the last 3 digits = 216000

Now check the closest cube of remaining digit 216

216 is exact cube of 6

So the answer is

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Que 4. - Find the cube root of 21952 - Last digit is = 2

So it will be changed with 8

Ignore the last 3 digits = 21952

Now check the closest cube of remaining digit 21

8 < 21 < 27

So we will take the cube of 2 which is 8 (Lower cube)

So the answer is

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Que 5. - Find the cube root of 636056 -

Last digit is = 6

Ignore the last 3 digits = 636056

Now check the closest cube of remaining digit 636

512 < 636 < 729

So we will take the cube of 8 which is 729. (Lower cube)

So the answer is

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