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      Question

      Find the next term in the series: 4, 9, 19, 39,

      79, ?
      A 159 Correct Answer Incorrect Answer
      B 177 Correct Answer Incorrect Answer
      C 168 Correct Answer Incorrect Answer
      D 132 Correct Answer Incorrect Answer

      Solution

      Observe differences: 9 тИТ 4 = 5 19 тИТ 9 = 10 39 тИТ 19 = 20 79 тИТ 39 = 40 Differences: 5, 10, 20, 40 тЖТ each term doubles. Next difference = 40 ├Ч 2 = 80 Next term = 79 + 80 = 159

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