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by rralph
October 31st, 2006, 10:40 am
Forum: General Forum
Topic: American decline?
Replies: 30
Views: 90218

American decline?

<t>QuoteOriginally posted by: eiriamjh...economic growth has been higher in the US than any other OECD country ...e.I find myself wondering more and more about the measures of economic growth, especially what they would look like if environmental damage were properly incorporated into the figures. T...
by rralph
October 31st, 2006, 9:19 am
Forum: General Forum
Topic: wilmottwiki
Replies: 17
Views: 90982

wilmottwiki

I just started playing around with the WilmottWiki myself last week, think I might have been the second registered user after 'Paul'. I think that there will eventually have to be some rules against blatent self promotion on this site. e.g. 'Piterbarg' is exclusively editting his own entry.
by rralph
October 27th, 2006, 10:43 am
Forum: Brainteaser Forum
Topic: Some teasers...
Replies: 23
Views: 100569

Some teasers...

<t>I am assuming that there is a response equivalent to the computer crashing (i.e. unable to give an answer that is definately true, or definately the opposite of true)It is quite easy to miss the computer which sometimes tells the truth and sometimes tells a lie. You can ask any computer, "Assumin...
by rralph
October 27th, 2006, 9:04 am
Forum: Brainteaser Forum
Topic: Some teasers...
Replies: 23
Views: 100569

Some teasers...

<t>The wording of question one still needs a bit of work. What does "the opposite of the truth" mean? Can we ask the computers to perform a sort? What is the opposite of the truth for a sorting, the opposite order? Does that mean that only "Yes/No" questions are allowed? What about "I don't know" as...
by rralph
October 26th, 2006, 2:38 pm
Forum: Forum and Website Bugs and Suggestions
Topic: Wiki for FAQ forum
Replies: 10
Views: 132807

Wiki for FAQ forum

<t>Woo Hoo!The Wiki is now up and running by the looks of it. Perhaps the Administrator of the website could promote it on the homepage...?A few gripes I have on my first inspection:- Users need to obtain a login to use it (can't we just use our normal login for Wilmott.com ?)- There is no way to na...
by rralph
September 7th, 2006, 9:04 am
Forum: Forum and Website Bugs and Suggestions
Topic: Wiki for FAQ forum
Replies: 10
Views: 132807

Wiki for FAQ forum

Any news?
by rralph
August 24th, 2006, 8:28 am
Forum: Brainteaser Forum
Topic: codebreaker
Replies: 8
Views: 96369

codebreaker

Surely the correct answer is 'Q' then. i.e. first letter (character) in the word 'Quote'.
by rralph
August 23rd, 2006, 9:43 am
Forum: Brainteaser Forum
Topic: codebreaker
Replies: 8
Views: 96369

codebreaker

Can you post the uncoded message and the coding algorithm please?
by rralph
August 9th, 2006, 1:12 pm
Forum: Brainteaser Forum
Topic: Probability Question
Replies: 13
Views: 133473

Probability Question

<t>Revisiting a very old topic here.One further thought - Time pressure is a serious problem for many candidates in these exams. I have been advised by lecturers to use this strategy and it occurs to me that they might be trying to encourage their students to put down any answer rather than no answe...
by rralph
August 8th, 2006, 11:23 am
Forum: Careers Forum
Topic: Try your hand at a real technical interview question
Replies: 27
Views: 97787

Try your hand at a real technical interview question

Just thinking out load here - Don't traders usually use the forward/futures prices quoted in the markets to work out mu?
by rralph
August 7th, 2006, 1:54 pm
Forum: Brainteaser Forum
Topic: Pool Puzzle
Replies: 55
Views: 107308

Pool Puzzle

QuoteOriginally posted by: sevvostHere is another paper treating the problem. This one actually describes an escape strategy (among other things) for the swimmer - see section 4.7, pages 8-9. most helpful...now if only I could speak German
by rralph
August 4th, 2006, 1:25 pm
Forum: Brainteaser Forum
Topic: Pool Puzzle
Replies: 55
Views: 107308

Pool Puzzle

Lol. How many academic papers have a chapter called 'The Homicidal chauffeur'?Who said mathematicians have no sense of humour?
by rralph
August 4th, 2006, 1:05 pm
Forum: Brainteaser Forum
Topic: Deal or No Deal
Replies: 5
Views: 98071

Deal or No Deal

<r>Actually, the bankers offers are usually way below the expected returns. The bankers offers do rise as a proportion of the average of the remaining priyes in the game as the number of prizes is gradually reduced but is still well short even when there are just two amounts left. For example, I've ...
by rralph
August 2nd, 2006, 6:44 am
Forum: Brainteaser Forum
Topic: Pool Puzzle
Replies: 55
Views: 107308

Pool Puzzle

<t>sevvost - quoting a formula without any information about how it is derived does not really help those of us on this thread who are scratching our heads over this problem. TheTheorist's strategy is the one I intuitively grasp as being optimal, although I am happy to admit that I cannot prove it.I...
by rralph
July 24th, 2006, 1:54 pm
Forum: Brainteaser Forum
Topic: Pool Puzzle
Replies: 55
Views: 107308

Pool Puzzle

<t>I agree with Msccube's explanation of the optimal strategy up to the point that the swimmer reaches the edge of the radius r circle. The zigzagging tactic would not work as described as the runner now has the angular advantage [Correction: "...angular speed advantage"]. As soon as the swimmer mov...
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