E B U C D N I HOW TO F 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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Learn this table & Solve Problems Quickly Number
Cube
Last Digit
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
10
1000
0
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Same numbers are 1,4,5,6,9,0 Swapped numbers are = 2,3,7,8
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.
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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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Que 1. - Find the cube root of 39304 Â 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
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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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