Question

Write vinculum number for the following numbers :

$11$

Answer 1

Nearest positive base to $11$ $=20$

Subtract number from the base i.e. $20-11=9\left(extra\right)$

Now add base and extra i.e. $20+9=2\overline{9}$

Clearly, $2\overline{9}$ means that $9$ is taken away from $20$.

Hence, vinculum of $11$ is $2\overline{9}$ .