Prelims · 8 Mental Ability · 8.15 Logic puzzles and problem solving

8.15.4 Magic squares, number grids and grid logic

Grid puzzles give each row, column or line a rule — equal sums in a magic square, each value once in a Latin square or sudoku, one match per person in a logic grid — and are solved by filling the cell with the fewest possibilities first.

  • APPSC Group 2 · Prelims
  • Standard level
  • 8 min read
  • Full course

Key terms

  • magic square
  • magic constant
  • Lo Shu
  • centre value
  • Siamese method
  • number grid
  • row and column sums
  • Latin square
  • mini sudoku
  • logic grid
  • attribute matching
  • elimination table

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Common trapsFoundation
  5. Quick revisionFoundation

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