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GATE 2024 AG – Question 10

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 2 marks · Multiple choice

What is the least number of squares to add to the figure so AB is a line of symmetry?

Diagram for GATE 2024 AG question 10
  1. 6
  2. 4
  3. 5
  4. 7

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Show answer and explanation

Correct answer: (A) 6

Explanation

Reflect every occupied cell across AB. Add one square wherever its reflected partner is absent, and count each missing partner once. The upper and lower cells already paired across AB require no additions. The remaining six unpaired cells need six reflected partners, so **6,A**.

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