WBCS Mains 2018 Official Paper-VI

If the total interest becomes Rs. $x$ for any principal having the rate of simple interest of $x\%$ per annum for $x$ years then the principal will be

If the length of radius of a right circular cylinder is doubled and height is halved, the lateral surface area will be

The length of a radius of a circle is $13\text{cm}$ and the length of a chord of the circle is $10\text{cm}$, the distance of the chord from the center of the circle is

The diagonals $PR$ and $QS$ of the rhombus intersect each other at the point $O$. What is the value of $\angle POS$?

If $(0,0)$, $(4,-3)$ and $(x,y)$ are collinear then