Page 1 of 2 1 2 LastLast
Results 1 to 20 of 40
  1. #1
    zexmarquies01's Avatar
    Join Date
    May 2002
    Location
    Ohio
    Posts
    2,668

    A Math type question that is impossible...

    Ok here it is..

    3 men go out to eat. the bill comes to exactly 30 bucks. so they each pay 10 dollars.

    The waitress takes the money to the back, realizes that there was a special, so their bill came to 25 bucks instead.

    trying to figure out a way to split 5 bucks between 3 people, she just decided to give each man one dollar back, and keep 2 dollars for herself, since she did not get a tip.

    So now, each man ends up paying 9 dollars. thats 27 dollars total. she keeps 2 dollars. thats a total of 29 dollars. WHERE DID THE OTHER DOLLAR GO?????

    literally, my friend at work asked this, and we are all stumped. its not a riddle, it seems to be one of those math questions that can't be done.

    anyone have any idea's on this at all???
    AMD X6 1055T @3.8Ghz
    GIGABYTE 890FX-A UD5
    6 Gigs of G Skill DDR3 1600 RAM
    EVGA GTX 460
    HAF 932 Tower

    "Talking about how fast you beat a game is like talking about how fast you are in bed."
    Do you like Anime? Then join the OCF anime club! OCF Anime Club Click here, and click JOIN!

  2. #2
    Member tom10167's Avatar
    Join Date
    Oct 2003
    Location
    Phoenix. YOUR HAIR IS GOOD TO EAT
    Posts
    4,575
    You're serious?

    It's 30 minus her two is 28.

    Everyone gives her a ten. The rightful change at this point is one dollar and sixty sixty cents.(1.66X3=5... the 5 that is owed)

    She decides to give back three of this, and keep two. The new change is three dollars(1x3) and two removed(3+2=5)

  3. #3
    Member PCGUY112887's Avatar
    Join Date
    Oct 2003
    Location
    Illinois
    Posts
    1,637
    But she gave each man back $1...

    So she had $30.. ended up being $25 went back and gave each man $1, there are 3 men.
    $29
    $28
    $27
    So there goes $3, she keeps $2.
    $30-$3=$27

    But then you think about it... each man ended up paying $9
    $10-$1 (the $1 they got back)
    $9*3 men=$27
    $27 paid in total by the men...

    Waiter kept $2
    $27+$2=$29

    Where in the heck did that extra $1 go?

    For some reason there is something wrong with my work.. because I think everyone can agree that $25+$3+$2=$30
    Antec Nine Hundred Black Steel Case
    Intel Q9550 @ 3.7ghz stable/cool
    8GB GSKILL DDR1000 RAM
    EVGA 9800gtx+
    Thermaltake 700W 80 PLUS Certified Modular Active PFC Power Supply
    Ultra-120 eXtreme Cooler
    Dual 22" Samsung LCD's


    3DMarkVantage - Not Yet

    Ex OC Folder

  4. #4
    Grasshoppa Senior SewerBeing's Avatar
    Join Date
    Jan 2004
    Location
    The truth?? You can't handle the truth!!
    Posts
    2,892
    you cant add the 2 dollars on you need to subtract them to get $25. The question really is invalid...
    "Unlike Windows, Linux tries to happily coexist with other OS's. It's not like Windows which will go out of its way to break other installs." MRD
    "On the second day of the seventh month, in the third year of the new milenium, Wedo looked down and saw new pow-ah join team 32, and it was good." Wedo
    "I switch Oses like most people change pants. :)" rogerdugans
    "Always be sure to flash your bios during lightning storms!" MRD

    Please Fold for team 32!
    portage > apt > source > rpm > windows update
    Gautam is a water buffalo

  5. #5
    zexmarquies01's Avatar
    Join Date
    May 2002
    Location
    Ohio
    Posts
    2,668
    and 27+2 = 29.

    if you think about it THAT way, then the math doesn't add up correctly.

    in a real life situation, this would work just fine. but it doesn't work on paper ( when thinking about it as each man paying 9 dollars, which in actuality they did after getting the 1 dollar back )
    AMD X6 1055T @3.8Ghz
    GIGABYTE 890FX-A UD5
    6 Gigs of G Skill DDR3 1600 RAM
    EVGA GTX 460
    HAF 932 Tower

    "Talking about how fast you beat a game is like talking about how fast you are in bed."
    Do you like Anime? Then join the OCF anime club! OCF Anime Club Click here, and click JOIN!

  6. #6
    Grasshoppa Senior SewerBeing's Avatar
    Join Date
    Jan 2004
    Location
    The truth?? You can't handle the truth!!
    Posts
    2,892
    no that math is wrong simply you are giving one discount then adding the other on. You need to do the # of people times the original payment then subtract the $3 from it they saved and you get a total cost of $27 for them. The 2 dollars are already in that...
    "Unlike Windows, Linux tries to happily coexist with other OS's. It's not like Windows which will go out of its way to break other installs." MRD
    "On the second day of the seventh month, in the third year of the new milenium, Wedo looked down and saw new pow-ah join team 32, and it was good." Wedo
    "I switch Oses like most people change pants. :)" rogerdugans
    "Always be sure to flash your bios during lightning storms!" MRD

    Please Fold for team 32!
    portage > apt > source > rpm > windows update
    Gautam is a water buffalo

  7. #7
    Member tom10167's Avatar
    Join Date
    Oct 2003
    Location
    Phoenix. YOUR HAIR IS GOOD TO EAT
    Posts
    4,575
    Pay 9? They didn't pay nine because the whole meal only costed $25, remember? They each paid 8.33, they each paid an extra .66 for a tip(.66 times three = 2) and they each got a dollar back.


    Quote Originally Posted by zexmarquies01
    27+2 = 29.

    1+1 = 2, it doesn't matter how you think about it, you just have to take every thing in to account.

  8. #8
    Member eh?'s Avatar
    Join Date
    Sep 2001
    Location
    Elkhart, Indiana
    Posts
    1,804
    Quote Originally Posted by SewerBeing
    The question really is invalid...
    This is really the problem.
    Back and trolling six-fold.

  9. #9
    Grasshoppa Senior SewerBeing's Avatar
    Join Date
    Jan 2004
    Location
    The truth?? You can't handle the truth!!
    Posts
    2,892
    @tom you are making this way too complex and yes they each paid $9. So their total cost was $27 not $29 because that would be giving the waitress $4 instead of $2 and she sounds sleazy already
    "Unlike Windows, Linux tries to happily coexist with other OS's. It's not like Windows which will go out of its way to break other installs." MRD
    "On the second day of the seventh month, in the third year of the new milenium, Wedo looked down and saw new pow-ah join team 32, and it was good." Wedo
    "I switch Oses like most people change pants. :)" rogerdugans
    "Always be sure to flash your bios during lightning storms!" MRD

    Please Fold for team 32!
    portage > apt > source > rpm > windows update
    Gautam is a water buffalo

  10. #10
    Member techun's Avatar
    Join Date
    Jul 2004
    Posts
    1,544
    30 for the meal..then they get three back

    they pay 9 dollars each ...27 dollars

    they paid 2 for tip...so 27-2=25..that's what they had to pay

  11. #11
    Member qualhiveldorf's Avatar
    Join Date
    Feb 2004
    Location
    Where am I? Who am I?
    Posts
    431
    In one way that I tried the math added up but in another way it didn't.Here is the one that works: 30/3= $10 per man, subtract 5 from total 25/3=8.33 per man, give 3 back and keep 2. 25+3+2=30

    The way it doesn'y work: 3 men each pay $10 (assume this is all the money that they have n their wallet, each man recieves $1 now they each have $1, net cost per man appears to be (10-1=9), (9x3= 27), (27+2= 29)?

    The three men end up with $3 and the restaraunt ends up with $25 for the meal and $2 for the waitress, 3+25+2= 30

    Thats the only way I can rationalize it.

  12. #12
    Member FireMogle's Avatar
    Join Date
    Apr 2001
    Location
    Lawrence, KS
    Posts
    1,605
    25/3 = $8 (1/3)
    8 (1/3) + 1 != 9
    each man paid 9 (1/3)
    It's hard to look at it like a learning experence.

    CPU: Intel i7 860 @ 4Ghz (22x182)
    RAM: 8GB G.Skill DDR3 1600
    Motherboard: Asus p7p55 lx
    Video: MSI N460GTX + Asus VH198T
    Hard Drives: AS596TB-32GMx2 RAID 0
    Other: HD-DVD/Blu Ray Combo Drive.
    All Powered by: Corsair 750W

  13. #13
    nerdlogic
    Guest
    Okay... so it was 30.

    Each man pays 10.

    She gives them back three.

    30(money given by men)-3(what the waitress returned)= 27(total money left)

    She kept two for herself

    27(after she gave the money back)-2(what she kept for tip)=25 (the bill as a special)

    27(total including the two dollar tip)/9(what they paid total since they were given a dollar back each)= 3(guys)

    All the money was accounted for.

  14. #14
    Member tom10167's Avatar
    Join Date
    Oct 2003
    Location
    Phoenix. YOUR HAIR IS GOOD TO EAT
    Posts
    4,575
    Wow. Read everything I posted(twice)

    This is basic arithmetic. God bless the public schools.

  15. #15
    Grasshoppa Senior SewerBeing's Avatar
    Join Date
    Jan 2004
    Location
    The truth?? You can't handle the truth!!
    Posts
    2,892
    nerdlogic is right tom if you add the $2 in to get $29 you would have given the waitress $4 as a tip when she only took $2.
    "Unlike Windows, Linux tries to happily coexist with other OS's. It's not like Windows which will go out of its way to break other installs." MRD
    "On the second day of the seventh month, in the third year of the new milenium, Wedo looked down and saw new pow-ah join team 32, and it was good." Wedo
    "I switch Oses like most people change pants. :)" rogerdugans
    "Always be sure to flash your bios during lightning storms!" MRD

    Please Fold for team 32!
    portage > apt > source > rpm > windows update
    Gautam is a water buffalo

  16. #16
    Senior A64 Killer {PMS}fishy's Avatar
    Join Date
    Dec 2001
    Location
    Boston, MA
    Posts
    8,673
    1+1 = 3
    Pick 2: Speed -- Reliability -- Cost

    Trouble Shooting 101:
    1. RTFM
    2. Repeat Step 1

    6ghz Club Member.


    cw823 Fan Club Founding Member, are you?

  17. #17
    Member tom10167's Avatar
    Join Date
    Oct 2003
    Location
    Phoenix. YOUR HAIR IS GOOD TO EAT
    Posts
    4,575
    Nerdlogic is right..... because she reiterated what I just said.

    :blink:

  18. #18
    Member penquissciguy's Avatar
    Join Date
    May 2003
    Location
    Maine
    Posts
    575
    I'd like to invite two of you out to dinner (dutch treat, of course)

    I get the bill and say that it's $30. Let's say that instead of the waitress collecting the money, you all give me your $10. The waitress then comes back and says that the bill was miscalculated and that the real bill is $25. I pay the $25 bill, give each of you a dollar back and pocket the other three dollars.

    Do you have any trouble tracking the money now? It's the same sequence, only removing the waitress. You now can see that the statement "each man paid $9" is false, 'cause I got some of your money. Thanks for the tip .

    Ken
    Is this a holdup?
    It's a science experiment!


    ---------------------------------------------------------------------------------------------

    My Heatware

  19. #19
    Grasshoppa Senior SewerBeing's Avatar
    Join Date
    Jan 2004
    Location
    The truth?? You can't handle the truth!!
    Posts
    2,892
    each man did in fact pay $9 in total. Let us do the basic math here

    3x10=30

    now each got a dollar back so now we have

    3x9=27

    and the waitress kept 2 of those dollars cause she didnt know how to split it so

    27-2=25

    which is what the food cost...

    @tom your posts are confusing
    "Unlike Windows, Linux tries to happily coexist with other OS's. It's not like Windows which will go out of its way to break other installs." MRD
    "On the second day of the seventh month, in the third year of the new milenium, Wedo looked down and saw new pow-ah join team 32, and it was good." Wedo
    "I switch Oses like most people change pants. :)" rogerdugans
    "Always be sure to flash your bios during lightning storms!" MRD

    Please Fold for team 32!
    portage > apt > source > rpm > windows update
    Gautam is a water buffalo

  20. #20
    Member Como's Avatar
    Join Date
    Nov 2003
    Location
    Maine
    Posts
    2,642
    ^^ incase that wasnt clear enough (it wasnt for me, i had ot think about this), the $27 includes the $2 tip, so dont add it ontop of the 27.
    This space is for rent.*


    *I'm Lying

Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •