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Which term is wrong in the series 6, 12, 22, 33, 48, 66, 87?

Competition practiceNumber Series
  • A33
  • B12
  • C22
  • D48

Step-by-Step Solution

Differences should increase by 3 (6, 9, 12, 15, 18, 21), giving 6, 12, 21, 33, ...; so 22 should be 21.
Answer: C) 22

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