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One term in this series is wrong: 4, 6, 9, 13, 18, 25. Which term is wrong?

Competition practiceAlphanumeric / Series
  • A18
  • B25
  • C9
  • D13

Step-by-Step Solution

The differences should increase by one each time: 2, 3, 4, 5, 6, giving 4, 6, 9, 13, 18, 24. The last term should be 24, so 25 is wrong.
Answer: B) 25

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