Results 1 to 3 of 3

Math Help - five 3s math puzzle please help

  1. #1
    gu12ls
    Guest

    five 3s math puzzle please help

    solve (3?3)?3?3?3=29 using + x / - only once. please help. thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member tukeywilliams's Avatar
    Joined
    Mar 2007
    Posts
    307
    You know the  \times cant go in the last position because 29 is prime.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Nov 2007
    Posts
    6
    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; November 20th 2007 at 04:53 AM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Help with a math puzzle
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 18th 2009, 04:40 PM
  2. Math puzzle
    Posted in the Math Puzzles Forum
    Replies: 4
    Last Post: July 23rd 2009, 07:19 AM
  3. Math puzzle
    Posted in the Math Challenge Problems Forum
    Replies: 5
    Last Post: February 3rd 2009, 06:37 AM
  4. Help me with this Math puzzle...
    Posted in the Math Challenge Problems Forum
    Replies: 6
    Last Post: October 11th 2007, 07:24 PM
  5. Math egg puzzle Help
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: January 24th 2007, 07:20 AM

Search Tags


/mathhelpforum @mathhelpforum