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Q.

Find the smallest whole number by which 2645 should be multiplied so as to get a perfect square. Also find it square root.


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a

410

b

115

c

215

d

510 

answer is B.

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Detailed Solution

Given number = 2645
By using prime factorization We get 2645=5×23×23
If the above number is multiplied by 5 then it will be a perfect square. 2645×5=13225
13225​=115
 
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Find the smallest whole number by which 2645 should be multiplied so as to get a perfect square. Also find it square root.