List of top Mathematics Questions on measurement of angles asked in KCET

The mean deviation about the mean for the data \( 4, 7, 8, 9, 10, 12, 13, 17 \) is:
The angles $A, B$ and $C$ of a triangle $ABC$ are in A.P. If $b : c =\sqrt {3} : \sqrt {2}$ then the angle $A$ is
The angle between the line x + y = 3 and the line joining the points (1, 1) and (–3, 4) is