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    Thrice my age three years back subtracted from thrice my age three years hence gives my age. How old am I now?
    Question

    Thrice my age three years back subtracted from thrice my age three years hence gives my age. How old am I now?

    A.

    21 years

    B.

    15 years

    C.

    18 years

    D.

    24 years

    Correct option is C

    Given:
    Let my present age now = x
    My age in three years hence = 3 + x
    My age three years ago = x - 3
    Calculations:
    According to question,
    x = 3(x+3)-3(x-3)
    x = 3x+9-3x+9
    x = 18
    Now I am 18 years old.

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