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Q.

Find out the cube root of 216.


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a

5

b

6

c

7

d

8 

answer is B.

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Detailed Solution

Concept:
When you come across this kind of question, look at the prime factors of a given number, take 1 as the  number that is always repeated 3 times, and multiply it to get the cube root of the number.
On prime factorisation, we get,
Question Image         Question ImageThen, Question ImageTherefore, cube root of 216 is:
Question ImageHence, the correct answer is option 2) 6
 
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