Find the square root of $1681$ by first principle (vargamula method)

49

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39

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41

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31

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Solution

The correct option is C $41$
Vargamula method
$41$
______
$4 | 1681$
$16$ $↓$
$81 | x 81$
$81$
_
x
$\Rightarrow 41$ .

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