Prelims · 8 Mental Ability · 8.9 Coding–decoding

8.9.3 Symbol and mathematical-operation coding

Symbol coding replaces signs, numbers or relations with other symbols; rewrite the expression in ordinary signs first, then evaluate it with BODMAS.

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

Key terms

  • mathematical operations
  • sign substitution
  • BODMAS
  • interchange of signs
  • interchange of numbers
  • pattern operations
  • symbol coding
  • inequality codes
  • letter-symbol coding
  • filling signs

What this note covers

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

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