Q. 2 C4.1( 7 Votes )

# Find the cube root of the following by looking at the last digit and using estimation.704959

Let n3 = 704959

Here, the unit’s place digit is 9;

Unit’s place digit of n must be 9.

Let us split the number 704959 as 704 and 959

Now, 83 < 704 < 93

803 = 512000 < 166000 < 903 = 729000

Since, the unit’s place digit of n is 9, the only possible number is 89.

Also, 893 = 704969

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