The cube root of a number is another number that, when multiplied three times, makes the first number.
Let us find the cube root of 39304 through a shortcut method involving four steps:
STEP 1:
To find the unit place of the cube root always remember the following points:
• If the last digit of a cube root is 8 then the unit digit will be 2.
• If the last digit of a cube root is 2 then the unit digit will be 8.
• If the last digit of a cube root is 3 then the unit digit will be 7.
• If the last digit of a cube root is 7 then the unit digit will be 3.
• If the last digit of a cube root is other than 2, 3, 7 and 8 then put the same number as the unit digit.
Therefore, the unit digit will be 4.
STEP 2:
Now, strike off the last 3 digits of the given number.
39304
STEP 3:
Now, find the nearest cube of the first 2 digit from the left, i.e., 39.
The nearest cube is 27.
STEP 4:
Now, 3 is the cube root of 27.
Therefore, the ten’s place digit will be 3.
So, the answer will be 34.
Isn't that easy and fun..
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