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Which term breaks the pattern in 6, 13, 27, 55, 111, 225, 447?

Competition practiceNumber Series
  • A225
  • B111
  • C447
  • D55

Step-by-Step Solution

Each term is double the previous plus 1: 6, 13, 27, 55, 111, 223, 447. The sixth term should be 223, so 225 is wrong.
Answer: A) 225

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