The angle between two hands of a clock at $4:30 \mathrm{p}.\mathrm{m}.$ is

Find $\angle AOC$, if $\angle BOC=60°$.

In the given figure, $AOB$ is a straight line and the ray $OC$ stands on it. If $\angle BOC=130°$, then find $\angle AOC$.

In the given figure, two straight lines $AB$ and $CD$ intersect at a point $O$. If $\angle AOC=40°$, then $\angle BOD=?$

In the given figure, rays $OA, OB, OC$ and $OD$ are such that $\angle AOB=50°, \angle BOC=90°, \angle COD=70°$ and $\angle AOD=x$. The value of $x$ is:

In the figure, $ABC$ is a straight line. Find $\angle CBD$.