Q.

Find the square root of 225.


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a

  12

b

  13

c

  15

d

  None of these 

answer is C.

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Detailed Solution

  Concept: Calculating the square roots by factorization method To calculate the square root of 225   i.e. 225
By factorization method:

   3

     225

   3

     75

   5

     25

   5 

     5

 

     1

So, we get 225=3 ×3 ×5 ×5
Square root of 225=3 ×5
 = 15 Hence, the required number is 3.
 
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Find the square root of 225.