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      Question

      80, 255, 624, ?, 2400,

      4095 What should come in place of the question mark (?) in the following number series?
      A 1428 Correct Answer Incorrect Answer
      B 1255 Correct Answer Incorrect Answer
      C 1018 Correct Answer Incorrect Answer
      D 1295 Correct Answer Incorrect Answer
      E 1215 Correct Answer Incorrect Answer

      Solution

      3⁴ - 1 = 80 4⁴ - 1 = 255 5⁴ - 1 = 624 6⁴ - 1 = 1295 7⁴ - 1 = 2400 8⁴ - 1 = 4095

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