GATE EC 2021 Set 1 Q3 — General Aptitude

The figure below has exactly three intersecting line segments with a rectangular portion $\text{WXYZ}$ missing. Which one of the following options $\mathrm{P}, \mathrm{Q}, \mathrm{R}$, and S is the missing portion $\text{WXYZ}$?

Open the full question

Examples of mirror and water reflections are shown in the figures below: An object appears as the following image after first reflecting in a mirror and then reflecting on water. The original object is

​​​Two identical sheets $\text{A}$ and $\text{B}$, of dimensions $24 \mathrm{~cm} \times 16 \mathrm{~cm}$, can be folded into half using two distinct operations, $\text{FO1}$ or $\text{FO2}$. In $\text{FO1}$, the axis of folding remains parallel to the initial long edge, and in $\text{FO2}$, the axis of folding remains parallel to the initial …

How many rectangles are present in the given figure?

The figure shows a grid formed by a collection of unit squares. The unshaded unit square in the grid represents a hole. What is the maximum number of squares without a “hole in the interior” that can be formed within the $4 \times 4$ grid using the unit squares as building blocks?