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Solve numeric sequence pattern puzzles

OptiverSoftware Engineer · Online Assessment
MediumSoftware EngineerOnline AssessmentStatistics & Math

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This question evaluates pattern recognition and quantitative reasoning skills, requiring identification of numeric relationships, series properties, and simple number-theoretic or arithmetic transformations.

For each sequence below, determine the next number and explain the rule you used: (

  1. 20, 40, 50, 110, 115, 215, ? (
  2. 15, 35, 45, 105, 110, 210, ? (
  3. 4, 3, 7, 9, 10, 27, ? (
  4. 3, 7, 13, 19, 29, 37, ? (
  5. 19, 18, 20, 60, 15, 14, 16, ?