Question
Fill in the blank.
$\sqrt{1681}=\ .......$

Answer

$\sqrt{1681}=41$Solution:
$\begin{array}{c|c}&41\\\hline4&\overline{16}\ \overline{81}\\4&16\ \ \ \ \ \ \\\hline81&\ \ \ \ 81\\\ \ \ \ 1&\ \ \ \ 81\\\hline&\ \ \ \ 0\\\end{array}$
$\sqrt{1681}=41$

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