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      Question

      A sum doubles in seven years at simple interest. In how

      many years will the sum become five times the original sum?
      A 25 Correct Answer Incorrect Answer
      B 28 Correct Answer Incorrect Answer
      C 26 Correct Answer Incorrect Answer
      D 30 Correct Answer Incorrect Answer

      Solution

      years     times 7             2= (2-1) =1 x             5= (5-1) =4 x ×1 = 7×4 x = 28years

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