Grandson about as many days as son is weeks riddle

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My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 140 years.

Can you tell me my age in years?

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SherlockHolmes Expert Asked on 15th October 2016 in Math Puzzles.
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  • 1 Answer(s)

    m = my age in year
    s  = son in years
    G  = grandson in years

    G + s + g = 140 years

    substitute G for into each

    G + 12G + 7G  = 140

    20G = 140

    G  = 140/20

    G  = 7 years

    s = 49 years

    m = 84 years

    conmcgee Curious Answered on 21st November 2016.
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