Nine consecutive odd whole numbers sum to 243. Find the sum if the first and last whole numbers in this nine-addend ser.

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  1. let the first odd whole number be
    then the others are n-6, n-4 , n-2 , n , n+2, n+4, n+6, and n+8

    their sum = 9n
    (now wasn't that a clever way to define my numbers?)

    9n = 243
    n = 27

    first = 27-8
    last = 27 + 8
    and that sum = 27+27 = 54

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