Find the cube root of 91125 by estimation method.

1.	Find the cube root of 91125 by estimation method.
Answer» Step 1: Form groups of three STARTING from the RIGHTMOST digit of 91125. 91 125. Step 2: Take 125. The digit 5 is at its one's place. We take the one's place of the REQUIRED cube root as 5. Step 3: Take the other group, i.e., 91. Cube of 4 is 64, and cube of 5 is 125. 91 LIES between 64 and 125.

Answer»

Step 1: Form groups of three STARTING from the RIGHTMOST digit of 91125.

91 125.

Step 2: Take 125. The digit 5 is at its one's place. We take the one's place of the REQUIRED cube root as 5.

Step 3: Take the other group, i.e., 91. Cube of 4 is 64, and cube of 5 is 125. 91 LIES between 64 and 125.

Discussion