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Find the wrong term in the series: 2, 6, 12, 20, 30, 45, 56

Competition practiceNumber Series
  • A56
  • B20
  • C45
  • D30

Step-by-Step Solution

The terms follow n(n+1): 2, 6, 12, 20, 30, 42, 56. The sixth term should be 42, so 45 is wrong.
Answer: C) 45

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