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 Just A Math Problem
 Rufruf From Canada, joined Oct 2006, 42 posts, RR: 0Posted Sun Nov 12 2006 17:01:36 UTC (9 years 6 months 3 weeks 4 hours ago) and read 3362 times:

 Three people get a motel room. Each is charged \$10.00 ( 3 x 10 = \$30.00 ) The desk clerk figures he has over charged them by \$5.00 and tells them so. They decide that the 3 people will be refunded a \$1.00 each and the clerk will keep the other \$2.00 ( 3+2 = 5 ). So each person actually only paid \$9.00 instead of the \$10.00. Right ? 3 x \$ 9.00 = \$ 27.00 and the \$2.00 the clerk kept =\$29.00.... Suddenly a Dollar go's missing. Go Figure
 30 replies: All unread, showing first 25:
 Klaus From Germany, joined Jul 2001, 21652 posts, RR: 53 Reply 1, posted Sun Nov 12 2006 17:14:47 UTC (9 years 6 months 3 weeks 3 hours ago) and read 3346 times:

 The proper sum would have been 30 - 5 = 27 - 2 = 25. Nothing is missing.
 RichardPrice From , joined Dec 1969, posts, RR: Reply 2, posted Sun Nov 12 2006 17:15:13 UTC (9 years 6 months 3 weeks 3 hours ago) and read 3342 times:

 The extra dollar never existed. The original amount is \$30. The room is \$25. The 'pocketed amount' is \$2. The refunded amount is \$3. \$9 x 3 = \$27 The amount the Clerk pockets is within the \$9 paid, the \$3 given back makes the total up to \$30, the \$2 is deducted from the \$27 not added to make the \$25 room cost.
 Go3Team From United States of America, joined Mar 2004, 3269 posts, RR: 14 Reply 3, posted Sun Nov 12 2006 17:25:00 UTC (9 years 6 months 3 weeks 3 hours ago) and read 3334 times:

 Must be the new math they are teaching in schools these days.
 Yay Pudding!
 Rufruf From Canada, joined Oct 2006, 42 posts, RR: 0 Reply 4, posted Sun Nov 12 2006 17:50:32 UTC (9 years 6 months 3 weeks 3 hours ago) and read 3321 times:

 I still only paid \$9.00 . as the other two people did . I started with \$10.00 and I got a dollar back. I'm happy only pay in \$9.00 . Try it around a table and use tooth picks , or matches , or stir sticks. count them as you pass them back and forth. It's all in interpretation. Logic ? maybe. numbers don't lie ............ right
 RichardPrice From , joined Dec 1969, posts, RR: Reply 5, posted Sun Nov 12 2006 18:06:18 UTC (9 years 6 months 3 weeks 3 hours ago) and read 3303 times:

 Quoting Rufruf (Reply 4): It's all in interpretation. Logic ? maybe. numbers don't lie ............ right

Actually, in the puzzle given in your original post, numbers do lie.

You say that the three people get \$1 each back, and the motel clerk pockets \$2.

Then you say that \$10 - \$1 = \$9. Thats reasonable enough.

However, in that \$9 is a cut of the \$2 the Clerk keeps, so to add it on later (\$27 + \$2 = \$29) is wrong because its already counted in the running total. What should be added on is the three \$1 refunds, which takes the total up to \$30 as expected.

Nothings missing, the puzzle as given is basically incorrect on purpose in order to provide the problem stated.

The real question is - what are three people doing with a motel room together? Why havent I been invited?

[Edited 2006-11-12 18:10:50]

 Sv2008 From United Kingdom, joined Aug 2006, 622 posts, RR: 0 Reply 6, posted Sun Nov 12 2006 18:08:37 UTC (9 years 6 months 3 weeks 3 hours ago) and read 3303 times:

 It's a trick with the wording. Richard pretty much explaind it, but to add to it, the three really paid £0.66 each I think of the new amount to contribute to the extra them gave away.
 TZ757300 From United States of America, joined Aug 2005, 2922 posts, RR: 4 Reply 7, posted Sun Nov 12 2006 19:14:12 UTC (9 years 6 months 3 weeks 1 hour ago) and read 3262 times:

 thats almost as bad as this
 LETS GO MOUNTAINEERS!
 Sv2008 From United Kingdom, joined Aug 2006, 622 posts, RR: 0 Reply 8, posted Sun Nov 12 2006 20:37:36 UTC (9 years 6 months 3 weeks ago) and read 3230 times:

 CastleIsland From , joined Dec 1969, posts, RR: Reply 9, posted Sun Nov 12 2006 20:58:42 UTC (9 years 6 months 3 weeks ago) and read 3217 times:

 All I can say is that this sounds like an "hourly rate" at a sleazy motel in a bad part of town.
 FutureSDPDcop From United States of America, joined Feb 2006, 1297 posts, RR: 4 Reply 10, posted Mon Nov 13 2006 02:42:02 UTC (9 years 6 months 2 weeks 6 days 18 hours ago) and read 3144 times:

 Quoting CastleIsland (Reply 9):All I can say is that this sounds like an "hourly rate" at a sleazy motel in a bad part of town.

Is this first hand knowledge or....?

 Shinkai From , joined Dec 1969, posts, RR: Reply 11, posted Mon Nov 13 2006 03:21:40 UTC (9 years 6 months 2 weeks 6 days 17 hours ago) and read 3125 times:

 BLEH! what an easy question! how about you figure this one out: f(x) = 3cos3x f'(x) = ??? f''(x) = ??? f'''(x) = ??? now find the mclaurin series of f(x) up to x^3!!!
 CastleIsland From , joined Dec 1969, posts, RR: Reply 12, posted Mon Nov 13 2006 03:28:39 UTC (9 years 6 months 2 weeks 6 days 17 hours ago) and read 3122 times:

 Quoting FutureSDPDcop (Reply 10):Is this first hand knowledge or....?

That depends on what city we're talkin' 'bout.

 Dan2002 From United States of America, joined Dec 2002, 2055 posts, RR: 4 Reply 13, posted Mon Nov 13 2006 03:34:34 UTC (9 years 6 months 2 weeks 6 days 17 hours ago) and read 3114 times:

 A guy asks 'What's Punk?'. I kick over a trash can and its punk. He knocks over a trash can and its trendy.
 Iamcanadian From Canada, joined exactly 15 years ago today! , 734 posts, RR: 1 Reply 14, posted Mon Nov 13 2006 05:27:23 UTC (9 years 6 months 2 weeks 6 days 15 hours ago) and read 3085 times:

 Quoting Shinkai (Reply 11):f(x) = 3cos3x f'(x) = ??? f''(x) = ??? f'''(x) = ???

f'(x) = -9sin(3x)
f''(x) = -27cos(3x)
f'''(x) = 81sin(3x)

 Quoting Shinkai (Reply 11):now find the mclaurin series of f(x) up to x^3

What is a Mclaurin series?

 Shut up and calculate.
 RichPhitzwell From , joined Dec 1969, posts, RR: Reply 15, posted Mon Nov 13 2006 05:36:16 UTC (9 years 6 months 2 weeks 6 days 15 hours ago) and read 3078 times:

Are you serious? A simple division vs multiplication problem?

Here is one for ya what is a 30% markup of \$100

\$130

or

\$142.85

Warning, becomming drunker by the sip.

[Edited 2006-11-13 05:37:38]

 Rufruf From Canada, joined Oct 2006, 42 posts, RR: 0 Reply 16, posted Thu Nov 16 2006 08:46:34 UTC (9 years 6 months 2 weeks 3 days 12 hours ago) and read 2982 times:

 Hell I was just bringing up a point . Jessss Sorry I brought it up. Never mind But three investors invest 3 million dollars ...and the accountant takes 2 million.. and the ......
 Kay From France, joined Mar 2002, 1887 posts, RR: 3 Reply 17, posted Thu Nov 16 2006 15:16:29 UTC (9 years 6 months 2 weeks 3 days 5 hours ago) and read 2982 times:

 30% markup of \$100 is 130 because the markup is of 100. But if you say that "sales have fallen 30% this year, to 100", then it means that last year the sales were 142.85. Easy.. as well the initial problem, which was a trap for really "unmathematical" people only   Kay
 DocPepz From Singapore, joined May 2001, 1971 posts, RR: 3 Reply 18, posted Thu Nov 16 2006 15:36:02 UTC (9 years 6 months 2 weeks 3 days 5 hours ago) and read 2982 times:

 f'(x) = -9sin(3x) f''(x) = -27cos(3x) f'''(x) = 81sin(3x) http://mathworld.wolfram.com/MaclaurinSeries.html That's what the Maclaurin Series is. So since we have f(x) = 3cos(3x) f'(x) = -9sin(3x) f''(x) = -27cos(3x) f'''(x) = 81sin(3x) The Maclaurin series is till x^3 is as follows: 3 - 15.5x^2 The coefficient of x^3 is zero since sin 0 = 0 thus the answer stops there. Pretty simple if you ask me, it's just substituting values into equations. Requires no brains! Now Shinkai here is a question for you. You took SIA from Singapore to Perth in 2001. When you changed planes in Singapore to catch the flights to Perth, You thought you were in: 1)Asia 2)Europe 3)Mars 4)A Hotel Room with 3 Men
 Vikkyvik From United States of America, joined Jul 2003, 12146 posts, RR: 24 Reply 19, posted Thu Nov 16 2006 15:52:43 UTC (9 years 6 months 2 weeks 3 days 5 hours ago) and read 2982 times:

 Quoting DocPepz (Reply 18):Now Shinkai here is a question for you. You took SIA from Singapore to Perth in 2001. When you changed planes in Singapore to catch the flights to Perth, You thought you were in: 1)Asia 2)Europe 3)Mars 4)A Hotel Room with 3 Men

Priceless!

But remember, Stephen Hawking doesn't do geography (geology).

 I'm watching Jeopardy. The category is worst Madonna songs. "This one from 1987 is terrible".
 DocPepz From Singapore, joined May 2001, 1971 posts, RR: 3 Reply 20, posted Thu Nov 16 2006 16:01:17 UTC (9 years 6 months 2 weeks 3 days 5 hours ago) and read 2982 times:

 My bad, the answer should be 3 - 13.5x^2. Not 15.5 as I said above. I did my A Levels in 2000 which was the last time I touched Maclaurin's series. Thankfully I still remember calculus though I've clearly forgotten how to do simple division. 27/2 is indeed 13.5 and not 15.5.
 Linco22 From United Kingdom, joined Jun 2005, 1389 posts, RR: 13 Reply 21, posted Thu Nov 16 2006 16:01:38 UTC (9 years 6 months 2 weeks 3 days 5 hours ago) and read 2982 times:

 Its simple. Skidmarks was the clerk and tried to rip them off. Its pathetic.
 JRadier From Netherlands, joined Sep 2004, 4815 posts, RR: 36 Reply 22, posted Thu Nov 16 2006 16:13:51 UTC (9 years 6 months 2 weeks 3 days 4 hours ago) and read 2982 times:

 Quoting Rufruf (Reply 4):numbers don't lie ............ right

wich is why there are lies, damn lies and statistics

 For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and ther
 Rufruf From Canada, joined Oct 2006, 42 posts, RR: 0 Reply 23, posted Sun Nov 19 2006 08:13:55 UTC (9 years 6 months 2 weeks 12 hours ago) and read 2610 times:

 What a lot of fun !!! Gotta love the fraction answers. The answer is ? Did you all have a good sleep in what ever motel you were in ? I actually have a life . New one .. Which planet takes longer to circle the sun then it's day .
 Shinkai From , joined Dec 1969, posts, RR: Reply 24, posted Sun Nov 19 2006 10:46:46 UTC (9 years 6 months 2 weeks 10 hours ago) and read 2590 times:

 Quoting DocPepz (Reply 18):Now Shinkai here is a question for you. You took SIA from Singapore to Perth in 2001. When you changed planes in Singapore to catch the flights to Perth, You thought you were in: 1)Asia 2)Europe 3)Mars 4)A Hotel Room with 3 Men

i choose 1.

see you in Singapore Changi Airport this december!

 25 RichardPrice : If you actually mean what you wrote literally then nearly all the planets have a year longer than their own day - only Venus has a day longer than it
 26 Rufruf : Actually the answer is Mercury. Mercury takes 88 days to revolve around the sun . It's rotation ( as it spins on it's axis takes something like 288 da
 27 RichPhitzwell : It is very simple...but you can mark up both ways to come to two different profit levels and still claim to be a 30% markup. As a PM at one company w
 28 Kalakaua : Okay... LAPLACE, anyone?! This is so fun! Find L{f(t)} if f"(t) + 3f'(t) - 8f'(t)=0, f(0)=1 and f'(0)=2 * L{f'(t)} =sL{f(t)} - f(0) Theorem: L{y'(t)}
 29 Rufruf : To last post When dos a equation have a ( if ) in it ? At least in chemeistry both sides are equal ( = )
 30 SpinalTap : An answer: f(t) = exp(-1.5*t)*[cosh(sqrt(10.25)*t) + 3.5/sqrt(10.25)*sinh(sqrt(10.25)*t)] y = 2*exp(5*t) + 4*exp(3*t)
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