1. Check out our companion app, Forums for Android! Download from Google Play

6

Discussion in 'The Lounge' started by Vihzel, Apr 28, 2011.

?

6รท2(1+2) = ?

  1. 9

    94 vote(s)
    54.3%
  2. 1

    77 vote(s)
    44.5%
  3. 7

    2 vote(s)
    1.2%
  1. Vihzel

    Vihzel Destroying Balls Everyday
    Thread Starter
    333

    Apr 8, 2010
    5,364
    1,055
    333
    NYU Student & Real Estate Agent
    Manhattan, NY
    Welcome to one of the easiest algebraic equations in the world!... or is it? MUAHAHAHAHA!

    Can you solve this pesky little problem while also giving damning evidence that the other 2 can not possibly work? :p

    YOU MUST CHOOSE ONE AND ONLY ONE!

    Calculations:

    6
     

    Advertisement

    alostpacket and Stinky Stinky like this.
  2. Bob Maxey

    Bob Maxey Well-Known Member
    233

    Sep 24, 2010
    4,836
    806
    233
    LOL . . . the debate continues.

    Actually, I once used a similar problem in HP ICT Training. In my case, it was this one: 1 + 2 x 3 = ?

    Some said 9, some said 7. Oddly, when I expressed it the following way, time to solve was longer: 1.0 + 2.00 x 3.000 = ___

    The answer to your question is 8.96. Also, make the responders prove their answer.

    Since I am a world champion thread hijacker, I'll ask the gathered group to give the next number in this series and explain their guess.

    1,1,1,2,1 _____

    Bob

    PEMDAS!

    Nuff Said

    If you are bored, try these math problems.

    Unsolved Problems -- from Wolfram MathWorld

    Bob
     
    jroc and Stinky Stinky like this.
  3. Usta

    Usta Well-Known Member
    333

    Jul 8, 2010
    2,585
    1,373
    333
    The Netherlands
    @Vihzel,
    Can I have a voting option: Both "9" and "1"? :)
     
  4. Abdur

    Abdur Well-Known Member
    63

    Sep 30, 2010
    252
    34
    63
    If you use the order of operations, Brackets comes before all :p Therefore 9 would be the correct answer ;)
    (Either 9 or 1 :p )
     
  5. Vihzel

    Vihzel Destroying Balls Everyday
    Thread Starter
    333

    Apr 8, 2010
    5,364
    1,055
    333
    NYU Student & Real Estate Agent
    Manhattan, NY
    You have to make a decision simply based on the equation given in the title. Imagine as if you had that on a test. Better be careful. :)

    An equivalent problem was posted on a physics forum with two answers essentially at 50/50.
     
  6. Stinky Stinky

    Stinky Stinky Well-Known Member
    643

    Aug 31, 2010
    4,237
    2,141
    643
    Monkey
    In a Dumpster!
    Ahhh!

    I like a challenge!

    I LOVE Maths even though I suck at it so much! :)

    Hmm the brackets say that is a single unit but on the other hand the division sign shows the whole thing or the entire equation is divided by 6.

    So it looks like this:

    2(1 + 2)
    ________

    6

    So it is 1.

    So I think the answer is 1 if we use BODMAS. It should be that I think so at least.

    However BODMAS claims that Division comes before multiplication and then multiplication comes after Division in that order / sequence.

    But some Mathematicians say that neither Division and Mulitplication comes before the other but I am not too sure why lol.

    I think they are both equally important because both basically boil down to Add and Subtract.



    World champion thread hi-jacker LOL you make me laugh dude! :D

    If we use sequences and series I think the answer is 3

    I think this is an "Dual" infinite sequence :)

    That is there are two sequences in this number line.

    First Sequence is 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

    NOW the second sequence is:

    1, 2, 3, 4, 5, etc etc

    But I could be totally wrong lol :)
     
  7. 330D

    330D From My Cold Dead Hands
    213

    Mar 4, 2010
    2,863
    779
    213
    operator
    upstate NY
    You must solve the problem within the brackets as per the order of operations, therefore it must be 9. Don't you guys remember 6th grade math?
     
  8. Usta

    Usta Well-Known Member
    333

    Jul 8, 2010
    2,585
    1,373
    333
    The Netherlands
    Brackets are clear enough. The more interesting part is this:

    6
    --- * 3 = 9
    2

    or

    6
    --- = 1
    2*3

    Depends how you look at it... :)
     
    Tumeg, jroc and Stinky Stinky like this.
  9. indybail

    indybail Well-Known Member
    58

    The parentheses dictate that the product within them should multiplied by the product external to them.
     
  10. lunatic59

    lunatic59 Moderati ergo sum
    Moderator
    4,138

    Jun 12, 2010
    32,038
    26,233
    4,138
    Male
    IT
    Pennsylvania
    Ahh, wonderful trick question. I haven't seen this since my days as a janitor for the CIA ... ladies rooms only (hey, government jobs have their perks.)

    It a basic binary cipher where integers represent 1's and symbols 0's so:

    6
     
    alostpacket likes this.
  11. nyydynasty

    nyydynasty Well-Known Member
    103

    Sep 13, 2010
    956
    172
    103
    Male
    IT Manager
    NY
    google says so ... i'm voting "9"
    Google
     
  12. Roze

    Roze Hiding behind a mystery
    333

    Jan 20, 2010
    9,814
    2,183
    333
    Where the Sakura grows
    I go with 9 because of BODMAS

     
  13. shawn1224

    shawn1224 Ex CEO-DNPSEA foundation
    163

    Dec 10, 2009
    2,186
    292
    163
    Male
    Houston, TX
    Wolfram Alpha says 9 so I'm going with that.


    I'm guessing the answer is 3

    The sequence is

    1,1

    1,2

    1,3

    1,4

    1,5

    and so on ...
     
  14. krouget

    krouget Well-Known Member
    68

    Jan 13, 2010
    456
    121
    68
    The problem is more clearly written like this: (6/2) * (1+2), in which the answer is 9.

    We were always taught to write using parenthesis/brackets when in question, so as to be clear about our intention, and to circumvent confusion.

    In order for it to be 1, people would have to add their own set of parenthesis/brackets, which wouldn't follow the problem, as written. It's not written as: 6/[2*(1+2)], for example.
     
  15. dan330

    dan330 Well-Known Member
    923

    Jan 22, 2010
    11,804
    3,407
    923
    my answer is 1.
    following BODMAS
    and the assumption of (), when next to a #, there is an assumption fo () around them.

    so the equation should read:
    (6) / (2(1+2)) =
    6 / (2(3)) =
    6 / 6 =
    1 = x
     
    PrinceCorwin likes this.
  16. jroc

    jroc Well-Known Member
    363

    Apr 10, 2010
    2,614
    358
    363
    its 1

    In school many years ago they taught us PEMDAS or Please Excuse My Dear Aunt Sally if that helped ppl remember it easier. They still do this today, my kids school anyway.

    Parenthese
    Exponents
    Multiplication
    Division
    Addition
    Subtraction

    Ahhh I was in so big of a rush I see Bob Maxey aleady bought up PEMDAS. It pays to read threads from the beginning to end and not skip...lol

    I see one thing...there are some different schools of thought in here...lol I'm sticking with 1.

    Now I'm curious: I see BODMAS could be interpreted division first than multiplication. How can one use both PEMDAS and BODMAS and get the same answer?

    And doing some reading I guess I should say they taught us PEMDAS in the U.S.
     
    PrinceCorwin likes this.
  17. theres two right answers, if I remember PEMDAS was actually


    P
    E
    M+D
    A+S

    and it shouldnt matter what order you use. except with this problem CURSE YOU!
     


  18. as for your problem bobby boy (just felt like it ) im going to guess the answer is 3 although with my answer im inputting my own order

    1(multiply->),1(divide->),1(subtract->),2(add->),1 _____
     
  19. ParishL31

    ParishL31 Well-Known Member
    68

    Oct 15, 2010
    409
    105
    68
    Student
    Colorado
    I say 9 as well. With PEMDAS, it's what's inside the parenthesis. As others have said, when the one number is in the parenthesis and the other is outside, it can simply be rewritten with a multiplication symbole.

    2(3) = 2 * 3, and once you rewrite it that way, PEMDAS takes over and you divide 6/2 first then multiply by 3.

    Also just punched it into my TI-83 and got 9. I trust that thing with my life...well at least when it comes to math.
     
  20. apavolka

    apavolka Well-Known Member
    43

    May 15, 2010
    495
    30
    43
    Plumbing Supply House
    Flagstaff, AZ
    Order of operations (PEMDAS) states that multiplication and division is done left to right in the same step... as is addition and subtraction.. answer is 9.

    http://www.purplemath.com/modules/orderops.htm
    Second paragraph about ranks
     
  21. apavolka

    apavolka Well-Known Member
    43

    May 15, 2010
    495
    30
    43
    Plumbing Supply House
    Flagstaff, AZ
    Also hate to burst your bubble but unless you dictate the order of operations into the equation when it is entered into a ti-83/84, the calculator will NOT follow order of operations.

    However you are still correct.
     
  22. MyNamesTooLong

    MyNamesTooLong Well-Known Member
    78

    Jan 17, 2011
    826
    51
    78
    it's 1...order of operations.
     
  23. dan330

    dan330 Well-Known Member
    923

    Jan 22, 2010
    11,804
    3,407
    923
    so.. does the OP even have the right answer?????
     
    jroc likes this.
  24. jroc

    jroc Well-Known Member
    363

    Apr 10, 2010
    2,614
    358
    363
    ^lol!!

    The parentheses is the key. Thats why I think its 1. Now that I think about it, I see how using BODMAS gives the same answer of 1. You work with the parentheses until you cant anymore.

    Now I see how dan330 could use BODMAS and still get 1. And 2(3) is 2 times 3, thats what I was taught. Solving that still working with the parentheses makes that 6. Then its 6
     
  25. Bob Maxey

    Bob Maxey Well-Known Member
    233

    Sep 24, 2010
    4,836
    806
    233
    Clue #1:

    Do not look at it as a math problem. Think every day life.
     

Share This Page

Loading...