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Math Brainteaser (need help)

Discussion in 'BBS Hangout' started by francis 4 prez, Jul 22, 2004.

  1. francis 4 prez

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    okay, i probably should've called this "lindsay lohan topless!!!" or something to get more responses, but i'm going the honest route here so hopefully someone helps out.

    anyway, there is this math game called 24 that we used to play in math class back in elementary school. it's a simple concept, you have 4 numbers and you try to get them to equal 24. my friend just happened to find some cards from the game today and we found one that seems impossible. now my friend and i have won lots of stuff at math competitions in the past, so an elementary school game probably shouldn't be stumping us, but it is.

    here's how the game works:

    1. you have a card with 4 numbers on it
    2. using only addition, subtraction, multiplication, and division you have to make the numbers equal 24.
    3. you can only use each number once and you have to use all 4 numbers.

    an example would be a card with 8, 3, 3, and 2.

    (2+3/3)*8=24 or (3-2)*3*8=24.

    the impossible card has 5, 6, 6, and 9.

    can you figure out how to do it?

    (9-6)*6+5=23 is the closest we can get.

    i've never seen a question go unanswered on cf.net (even "does anyone know this song from this one commercial that's kind of upbeat and has the words 'the' and 'it' in it" questions), whether it was because someone knew it or they just google real well. so don't let me down.
     
  2. Mango

    Mango Member

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    <a HREF="http://www.math2.org/math/general/multiplytable.htm">Multiplication Table</a>

    Is this allowed under the rules of the <i>24 Game</i>?

    (6 * 9) - (5 * 6) = <b>24</>
     
  3. giddyup

    giddyup Member

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    If it's "impossible" it cannot be done. Or are you just saying really damn hard?
     
  4. Bailey

    Bailey Veteran Member

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    We have a winner!
     
  5. Gutter Snipe

    Gutter Snipe Member

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    I think he meant really easy. 9*6-5*6 was the first thing in my head, but apparently I woke up too late.
    :D
     
  6. DanHiggsBeard

    DanHiggsBeard Member

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    yeah, that took all of 2 seconds to get.
     

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