Answers

2014-03-25T12:21:22+05:30
Square root of 256 is  16
now
square root of 225 is 15
so square root of of 253 is between 15.5 and 16
so by trial and error we can find

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2014-03-25T13:42:38+05:30
The answer is 15.90   approximately 
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