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Math Help - middle number

  1. #1
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    middle number

    I need help. thansks


    The average of 7 different odd numbers is 53. If the smallest number is 45 and the largest is 69, what is the middle number?
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  2. #2
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    Re: middle number

    i think there is lots of solution but one of the solution maybe: 47,49,51,53,57
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  3. #3
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    Re: middle number

    I think that solution may be the only one given the restriction of all numbers being odd. If you picked a higher number the average would no longer be 53.
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  4. #4
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    Re: middle number

    Only one solution; the one given by Johnny.
    (x + 45 + 69) / 7 = 53
    x = 257 = the sum of the 5 missing numbers.
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