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      Question

      12, 24, 46, 78, 120,

      ? What will come in place of the question mark (?) in the following series?
      A 125 Correct Answer Incorrect Answer
      B 172 Correct Answer Incorrect Answer
      C 165 Correct Answer Incorrect Answer
      D 115 Correct Answer Incorrect Answer
      E none of these Correct Answer Incorrect Answer

      Solution

      ATQ, 12 + 12 = 24 24 + 22 = 46 46 + 32 = 78 78 + 42 = 120 120 + 52 = 172

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