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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 − R = 15

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