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Thread: Kayleen's Age Today

  1. #1
    Super Member harpazo's Avatar
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    Kayleen's Age Today

    In 20 years, Kayleen will be four times older than she is today. What is her current age?

    Solution:

    Let x = Kayleen's age now

    Let x + 20 = Kayleen's age 20 years from now

    My Equation:

    x + 20 = 4x

    Correct?
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  2. #2
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    Re: Kayleen's Age Today

    x + 20 = 4x means x = 20/3

    Looks like problem statement is wrong: "in 30 years" would work.
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  3. #3
    Super Member harpazo's Avatar
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    Re: Kayleen's Age Today

    Quote Originally Posted by DenisB View Post
    x + 20 = 4x means x = 20/3

    Looks like problem statement is wrong: "in 30 years" would work.
    I went back to the question.

    Here it is:

    In 20 years, Kayleen will be 1/4 of the age she is today. What is her current age?

    My Equation:

    x + 20 = (1/4)x

    This also leads to a fractional age. I guess using 30 as you suggested makes more sense.
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    Re: Kayleen's Age Today

    Quote Originally Posted by DenisB View Post
    x + 20 = 4x means x = 20/3

    Looks like problem statement is wrong: "in 30 years" would work.
    20/3 years = 6 years and 2/3 of a year = 6 years and 8 months. What's wrong with that?
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  5. #5
    Super Member harpazo's Avatar
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    Re: Kayleen's Age Today

    Quote Originally Posted by Debsta View Post
    20/3 years = 6 years and 2/3 of a year = 6 years and 8 months. What's wrong with that?
    Ok. Fine.
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  6. #6
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    Re: Kayleen's Age Today

    Quote Originally Posted by harpazo View Post
    I went back to the question.

    Here it is:

    In 20 years, Kayleen will be 1/4 of the age she is today. What is her current age?

    My Equation:

    x + 20 = (1/4)x

    This also leads to a fractional age. I guess using 30 as you suggested makes more sense.
    Does Kayleen get YOUNGER as the years go by? A problem statement should make SOME sense.
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  7. #7
    Super Member harpazo's Avatar
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    Re: Kayleen's Age Today

    Quote Originally Posted by TKHunny View Post
    Does Kayleen get YOUNGER as the years go by? A problem statement should make SOME sense.
    Well, we all age as time goes by.
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  8. #8
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    Re: Kayleen's Age Today

    Quote Originally Posted by harpazo View Post
    Well, we all age as time goes by.
    So why did you post this:
    "In 20 years, Kayleen will be 1/4 of the age she is today. What is her current age?"
    If she's 100 today, then she'll be 25 in 20 years?
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  9. #9
    Super Member harpazo's Avatar
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    Re: Kayleen's Age Today

    Quote Originally Posted by DenisB View Post
    So why did you post this:
    "In 20 years, Kayleen will be 1/4 of the age she is today. What is her current age?"
    If she's 100 today, then she'll be 25 in 20 years?
    The error is not mine. This question is found on youtube.com by a tutor, as I have seen, that has made several errors in his video clips.
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