Q. 2 C4.1( 7 Votes )

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

704959

Answer :

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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