Birthday puzzle

One week ago was my birthday.

Being a mathematician, I note that if I write my age in Roman numerals, and you write your age in Roman numerals, then my age never appears before your age, alphabetically.

How old am I?

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2 Responses to Birthday puzzle

  1. Jim says:

    Presuming you meant you’d write my age, not my name…

    You are 38 years old.

    38 = XXXVIII, which comes alphabetically after
    37 = XXXVII (one fewer I)
    39 = XXXIX (V comes after I)
    40 = XL (L comes before X)

    And nothing outside of the 30s begins with XXX, X being the furthest letter down the alphabet that appears in a Roman numeral (CDILMVX).

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