1.

1). 22). 153). 184). 23

Answer»

$(\begin{ARRAY}{l} \sqrt {23.001 + \sqrt {5931} } \times \sqrt {624.78} = \sqrt {15624} \times ?\\ \Rightarrow \sqrt {23 + \sqrt {5929} } \times \sqrt {625} = \sqrt {15625} \times ?\\ \Rightarrow \sqrt {23 + 77} \times 25 = 125 \times ?\\ \Rightarrow \sqrt {100} = \frac{{125}}{{25}} \times ? \end{array})$

⇒ 10 = 5 × ?

∴ ? = 2



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