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      Question

      4        9       28       99       ? 

          2105      12660 Find the missing number in the following number series:
      A 416 Correct Answer Incorrect Answer
      B 392 Correct Answer Incorrect Answer
      C 368 Correct Answer Incorrect Answer
      D 464 Correct Answer Incorrect Answer
      E 488 Correct Answer Incorrect Answer

      Solution

      4 × 1 + 5 = 9  9 × 2 + 10 = 28  28 × 3 + 15 = 99  99 × 4 + 20 = 416   416 × 5 + 25 = 2105    2105 × 6 + 30 = 12660

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