Screening Paper II · 1 General Mental and Psychological Abilities · APPSC Group 1
1.1.6 Non-verbal reasoning notes
7 notes, in reading order.
- 1.1.6.1Mirror and water images
A mirror held upright beside a figure swaps left and right; a water surface below it swaps top and bottom — so a letter survives a mirror only if it has a vertical line of symmetry, and survives water only if it has a horizontal one.
Advanced · 7 min · Full course - 1.1.6.2Paper folding and cutting
Every fold doubles the layers, and unfolding reflects whatever was cut across each crease in reverse order — so the opened sheet is always symmetric about every crease.
Advanced · 8 min · Full course - 1.1.6.3Counting figures: triangles, squares and lines
Count figures by a rule or by size, never by eye: squares and rectangles in a grid come from choosing lines, triangles in a fan come from choosing pairs of lines, and irregular figures are counted piece by piece — single regions, then pairs, then larger groups.
Advanced · 7 min · Full course - 1.1.6.4Embedded figures, figure completion and figure series
Figure questions use a small set of rules — rotation by a fixed angle, adding or removing an element, movement around a frame, shading cycles and symmetry — so track one element at a time and name its rule before you look at the options.
Advanced · 8 min · Full course - 1.1.6.5Dice: opposite faces and nets
A cube has three pairs of opposite faces, and any view shows three faces that meet at a corner — so faces seen together are never opposite, and opposite pairs are found by elimination, by the common-face rules, or from the net.
Advanced · 7 min · Full course - 1.1.6.6Cubes: painting, cutting and counting
A painted cube cut into n × n × n small cubes splits by position: corners have 3 painted faces, edges 2, face centres 1 and the inner block none — giving 8, 12(n − 2), 6(n − 2)² and (n − 2)³.
Advanced · 6 min · Full course - 1.1.6.7Figural analogy and classification
In a figure analogy, find every change from the first figure to the second and apply the same changes to the third; in classification, find the one property that three figures share and the fourth lacks.
Advanced · 8 min · Full course
Practise Non-verbal reasoning. Questions with answers explained, from the same topics.
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