Prelims · 8 Mental Ability · 8.8 Series, analogies and classification

8.8.1 Number series: patterns, missing and wrong terms

Every number series hides one rule (a difference, a ratio, a power or a mix); find it from the first few terms, test it on all terms, then apply it to the blank, the next term or the term that breaks it.

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

Key terms

  • number series
  • next term
  • missing term
  • wrong term
  • differences
  • second difference
  • ratio series
  • squares
  • cubes
  • alternate series
  • Fibonacci
  • arithmetic progression
  • nth term

What this note covers

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

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