Q2 of 67 Page 101

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


More from this chapter

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2

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

91125

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

166375

 3

Find the nearest integer to the cube root of each of the following:

(i) 331776


(ii) 46656


(iii) 373248

 1

Match the numbers in the column A with their squares in column B: