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      Question

      2 3 4 15 56

      ? What will come next in the place of question mark (?) in the following given number series:
      A 75 Correct Answer Incorrect Answer
      B 285 Correct Answer Incorrect Answer
      C 270 Correct Answer Incorrect Answer
      D 80 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      2 × 1 + 1 = 3 3 × 2 - 2 = 4 4 × 3 + 3 = 15 15 × 4 - 4 = 56 56 × 5 + 5 = 285

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