Complete missing parts of patterns
Pattern Completion is a non-verbal reasoning format in which an incomplete figure, grid or tiled design is shown with one section removed, and you must choose the option that restores the pattern exactly. Exam setters build these figures from a small number of repeatable ideas: 90-degree rotational symmetry, mirror symmetry about a vertical or horizontal axis, continuing borders and shaded-cell progressions. SSC CGL and CHSL usually cut a corner or quarter from a square design, NDA and CDS favour rotational grids, and AFCAT and Intelligence Bureau papers mix in line-continuation figures where the correct piece must join every stroke that touches the gap. Working through the practice set below trains you to check the cut edges first, then confirm symmetry, which is the fastest reliable route to the answer under exam time pressure.
A large figure or design has a missing section (usually a quarter or specific area). You must identify which of the given options correctly fills the missing portion, maintaining the overall pattern.
Tests spatial reasoning and pattern recognition, appearing in intelligence tests and visual reasoning sections.
1.Focus on the edges of the missing piece — they must match perfectly
2.Check if the design has rotational or reflective symmetry
3.Eliminate options where lines don't align with existing edges
Check for: 1) 4-fold rotational symmetry (90° rotation looks same), 2) Mirror symmetry (left-right or top-bottom), 3) Translational symmetry (repeating pattern). The most common is rotational symmetry.