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Find the WRONG number in the series: 3, 5, 11, 30, 83, 245, 731

Competition practiceNumber Series
  • A245
  • B30
  • C83
  • D11

Step-by-Step Solution

Rule is ×3 − 4: 3→5, 5→11, 11→29 (not 30), 29→83, 83→245, 245→731. So 30 is wrong; it should be 29.
Answer: B) 30

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