1 General Mental and Psychological Abilities · 1.1.2 Coding–decoding

1.1.2.5 Matrix and grid codes: row–column letter codes

In a grid code each letter is named by where it sits (row, then column, unless the question says otherwise), so build or copy the grid, read off two numbers per letter, and check every pair of an option, not just the first.

  • APPSC Group 1
  • Advanced level
  • 7 min read
  • Full course

Key terms

  • matrix coding
  • grid code
  • row and column
  • 5 x 5 letter grid
  • two matrices
  • 0 to 9 matrix
  • column-wise grid
  • Polybius square
  • move codes
  • phone keypad code
  • decoding a grid code
  • row-column order

What this note covers

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

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