Aptitude - Square Root and Cube Root - Discussion
Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 1)
1.
The cube root of .000216 is:
Answer: Option
Explanation:
| (.000216)1/3 | = |  |
216 |  |
1/3 |
| 106 |
| = | |
6 x 6 x 6 | |
1/3 |
| 102 x 102 x 102 |
| = | 6 |
| 102 |
| = | 6 |
| 100 |
= 0.06
Discussion:
63 comments Page 5 of 7.
Nathaniel said:
1 decade ago
I don't understand how you got 6\10^2 please I need a better explanation from that point.
Chandini said:
1 decade ago
@Sridhar.
Actually square root means 1/2 and cube root means 1/3.
We should find the 1/3 of 0.000216.
To eliminate point and 0's we should need 10^6 so it is.
216/10^6 = ((6*6*6)/(10^2*10^2*10^2))1/3.
= ((6^3)/((10^2)^3)).
= 6/10^2 = 6/100.
= 0.06.
Actually square root means 1/2 and cube root means 1/3.
We should find the 1/3 of 0.000216.
To eliminate point and 0's we should need 10^6 so it is.
216/10^6 = ((6*6*6)/(10^2*10^2*10^2))1/3.
= ((6^3)/((10^2)^3)).
= 6/10^2 = 6/100.
= 0.06.
SRIDHAR said:
1 decade ago
How to get 1/3?
Raaz said:
1 decade ago
It is a simple problem:
(0.000216) = (216/10^6).
(216/10^6) = ((6*6*6)/(10^2*10^2*10^2)).
By taking the cube root now.
((6*6*6)/(10^2*10^2*10^2))^(1/3) = (6/10^2).
6/100 = 0.06 Answer.
(0.000216) = (216/10^6).
(216/10^6) = ((6*6*6)/(10^2*10^2*10^2)).
By taking the cube root now.
((6*6*6)/(10^2*10^2*10^2))^(1/3) = (6/10^2).
6/100 = 0.06 Answer.
Anil said:
1 decade ago
Easy method:
0.000216 = [216/10^6].
[0.000216]^1/3 = [216/10^6]^1/3.
= [6^3/10^6]^1/3.
= [6/10^2].
= 6/100=0.06.
0.000216 = [216/10^6].
[0.000216]^1/3 = [216/10^6]^1/3.
= [6^3/10^6]^1/3.
= [6/10^2].
= 6/100=0.06.
Siva said:
1 decade ago
Please tell me friends is there any short cut find cube root.
Parul said:
1 decade ago
Because cube root is equal to 1/3.
Like : cube root 9 is equal to 9^1/3.
Got it. Vikas.
Like : cube root 9 is equal to 9^1/3.
Got it. Vikas.
Vikas said:
1 decade ago
Why we get 1/3?
Jyothis said:
1 decade ago
It is a simple problem
(0.000216)= (216/10^6)
(216/10^6)= ((6*6*6)/(10^2*10^2*10^2))
By taking the cube root now
((6*6*6)/(10^2*10^2*10^2))^(1/3)= (6/10^2)
6/100=0.06ans
(0.000216)= (216/10^6)
(216/10^6)= ((6*6*6)/(10^2*10^2*10^2))
By taking the cube root now
((6*6*6)/(10^2*10^2*10^2))^(1/3)= (6/10^2)
6/100=0.06ans
Narender said:
1 decade ago
Could tell me simple principle for this method ?
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