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Thread: five 3s math puzzle please help

  1. #1
    gu12ls
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    five 3s math puzzle please help

    solve (3?3)?3?3?3=29 using + x / - only once. please help. thanks
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  2. #2
    Senior Member tukeywilliams's Avatar
    Joined
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    You know the $\displaystyle \times $ cant go in the last position because 29 is prime.
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  3. #3
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    x must be a variable it seems, if there is going to be a solution.

    (3-3) = 0, you'll get nowhere with that.
    (3/3) = 1, can't get very far with a 1 either.
    (3x3) = 9, you used your multiply, you have one add to use and it's downhill from there.
    (3+3) = 6, used your add already, 3 x 6 = 18, downhill from there.

    I found it:
    (3 + 3)x3 - 3 / 3 = 29, where x = 5

    6*5*3 = 90
    90 - 3 = 87
    87 / 3 = 29

    I found it by figuring 29*3 = 87, so I must have 87 / 3 at the end... it wasn't a very good way of doing it though.
    Also, if you think there's away of doing it with x being a multiply symbol, go ahead and try... but I guarantee you it's a waste of time.

    Nevermind, this is apparently wrong due to order of operations.
    Someone on another forum found answers. One is:
    x =3
    (3x3) + 3 - 3/3 = 29

    Apparently there are others also.
    Last edited by Variant; Nov 20th 2007 at 04:53 AM.
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