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      Question

      7, 7, 21, 105, ?,

      6615 Find the missing number in the following number series:
      A 735 Correct Answer Incorrect Answer
      B 840 Correct Answer Incorrect Answer
      C 650 Correct Answer Incorrect Answer
      D 525 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      The series follows the pattern: 7 × 1 = 7 7 × 3 = 21 21 × 5 = 105 105 × 7 = 735 735 × 9 = 6615

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