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      Question

      Two years from now, the grandson's age will be 25% of

      the grandfather's age. Three years ago, the grandfather's age was five times the grandson's age. Determine the current age of the grandson.
      A 18 years Correct Answer Incorrect Answer
      B 22 years Correct Answer Incorrect Answer
      C 12 years Correct Answer Incorrect Answer
      D 17 years Correct Answer Incorrect Answer

      Solution

      3 years ago from now, let the age of the grandson and that of the grandfather be 'y' years and '5y' years, respectively 2 years hence from now, age of the grandfather = 5y + 3 + 2 = (5y + 5) years 2 years hence from now, age of the grandson = y + 3 + 2 = (y + 5) years According to the question, (5y + 5) = (y + 5) ÷ 0.25 Or, 5y + 5 = 4y + 20 So, y = 15 So, present age of the grandson = 15 + 3 = 18 years

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