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      Question

      The sum of ages of P and Q is 15 years more than the sum

      of ages of Q and R. How many years younger is R as compared to P?
      A 19 Correct Answer Incorrect Answer
      B 15 Correct Answer Incorrect Answer
      C 13 Correct Answer Incorrect Answer
      D 12 Correct Answer Incorrect Answer

      Solution

      Given: Sum of ages of P + Q is 15 years more than Q + R. Write the equation: P+Q=Q+R+15 Cancel Q from both sides: P=R+15 Rearranged: P βˆ’ R = 15

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