find the cube root of 13824 by estimation
Answers
Answered by
103
13824
4^3=4 unit digit
13=2^3(8) - 3^3(27)
25^3=15625.
So 24
4^3=4 unit digit
13=2^3(8) - 3^3(27)
25^3=15625.
So 24
Answered by
111
Estimating cube root method only works when given number is a perfect cube,
Make two groups:-13824
824:- unit digit is 4 unit digit of cube root is 4.
Second group:-13 it lies between2^3 and 3^3
so take the smaller number 2 as ten's place
ans is 24.
Make two groups:-13824
824:- unit digit is 4 unit digit of cube root is 4.
Second group:-13 it lies between2^3 and 3^3
so take the smaller number 2 as ten's place
ans is 24.
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