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Can anybody solve this Age math problem?

Bob is twice the age of Joe who is twice the age of Tim. In 9 years Tim will be the

same age as Bob is now. How old are Bob, Joe and Tim?

3 Answers

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  • 2 months ago

    b: age of Bob now

    j: age of Joe now

    t: age of Tim now

    Bob is twice the age of Joe: → b = 2j

    (…) who is twice the age of Tim: → j = 2t

    In 9 years Tim will be (t + 9) the same age as Bob is now (b).

    t + 9 = b → recall: b = 2j

    t + 9 = 2j → recall: j = 2t

    t + 9 = 4t

    3t = 9

    → t = 3

    Recall: j = 2t

    → j = 6

    Recall: b = 2j

    → b = 12

  • 2 months ago

    We could let the ages of Bob, Joe and Tim be:

    4x, 2x and x => ages now

    In 9 years we have: 4x + 9, 2x + 9 and x + 9

    Hence, x + 9 = 4x

    so, 3x = 9

    i.e. x = 3

    Therefore, ages now are 12, 6 and 3

    :)>

  • Anonymous
    2 months ago

    Bob = 2Joe = 2(2Tim)

    Tim + 9 = Bob = 4Tim

    3Tim = 9

    Tim = 3 Joe = 6 Bob = 12

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