1.

1). 502). 903). 404). 20

Answer»

Using APPROXIMATION,

$(\SQRT {5089} - \sqrt {2641} \; + \;\sqrt {1186} \APPROX \sqrt {4900} - \sqrt {2500} \; + \;\sqrt {900} \; = \;70 - 50\; + \;30\; = \;50)$

∴ √5089 - √2641 + √459 = 50


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