GATE CS 2021 Set 2 — Question 7

MCQ+2 / -0.67MediumTransformation of Shapes (Translation, Rotation, Scaling, Mirroring)Spatial AptitudeGeneral Aptitude

General Aptitude → Spatial Aptitude → Transformation of Shapes (Translation, Rotation, Scaling, Mirroring)

Last updated 5 September 2026

Question

A jigsaw puzzle has 2 pieces. One of the pieces is shown above. Which one of the given options for the missing piece when assembled will form a rectangle? The piece can be moved, rotated or flipped to assemble with the above piece.

Correct answer (A) [figure] Solution The given piece has a right edge with a specific pattern of indentations (notches) and protrusions (tabs). Observing from top to bottom, the pattern is: Notch, Tab, Notch, Tab . To form a solid rectangle when assembled, the missing piece must have a complementary edge (left edge) that fits perfectly into this pattern. The complementary pattern required is: Tab, Notch, Tab, Notch . Option (A): The left edge has the pattern: Tab, Notch, Tab, Notch. This matches perfectly. Option (B): The left edge starts with a Notch. Incorrect. Option (C): The pattern does not alternate correctly to match. Option (D): The left edge starts with a Notch. Incorrect. Thus, option (A) is the correct piece. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (A) [figure] Solution The given piece has a right edge with a specific pattern of indentations (notches) and protrusions (tabs). Observing from top to bottom, the pattern is: Notch, Tab, Notch, Tab . To form a solid rectangle when assembled, the missing piece must have a complementary edge (left edge) that fits perfectly into this pattern. The complementary pattern required is: Tab, Notch, Tab, Notch . Option (A): The left edge has the pattern: Tab, Notch, Tab, Notch. This matches perfectly. Option (B): The left edge starts with a Notch. Incorrect. Option (C): The pattern does not alternate correctly to match. Option (D): The left edge starts with a Notch. Incorrect. Thus, option (A) is the correct piece.

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