GATE 2021 ST – Question 3

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 1 mark · Multiple choice

Find the least number of squares to add so that the line P–Q becomes a line of symmetry of the shown arrangement.

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (C) 6

Explanation

Reflect each existing square across P–Q. Each of the six shown squares lacks its reflected partner at the corresponding position;the apparent cross is offset from the axis and does not pair across it. Adding these six distinct partners produces symmetry,and fewer cannot fill every missing reflected position. **C**.

More Spatial Aptitude: Spatial Reasoning and Visualization questions

GATE 2021 ST Q8 – A square sheet of side 1 is cut along a main diagonal. One resulting triangle is revolved…
GATE 2021 ST Q10 – Corners are cut from an equilateral triangle to produce the regular convex hexagon shown.…
GATE 2026 CS (CS1) Q2 – The figure shows two 4-tile patterns: a 2x2 square block and a 1x4 straight bar. Either…
GATE 2026 CS (CS1) Q7 – In Panel I of the figure below, the front view and top view of a structure are shown.…
GATE 2026 CS (CS2) Q2 – A black square PQRS has been cut into two parts. One part of it is shown in Panel I. Which…
GATE 2026 CS (CS2) Q7 – Two tiles are missing in Panel I. Which one of the options in Panel II is the appropriate…

All Spatial Aptitude: Spatial Reasoning and Visualization questions →