<t>This is an old puzzle - however, the way the problem has been stated here makes it harder to see the 'wrong' solution. You're supposed to very naively think "$30 tendered, $27 paid, $3 difference - but there's only $2 on the table". But of course it's $2 = $27 - $25. It's just the fact that the c...

<r>The OEIS is your friend here (well, not for 8) : <URL url="http://www.research.att.com/~njas/sequences/Seis.html">http://www.research.att.com/~njas/sequences/Seis.html</URL>. Remember that in all these sequence games, you may be looking for something slightly different to that which is published....

If you're on Windows, then I second the recommendation for Tortoise SVN. It works very well with small development groups, and it's being actively developed and maintained. I've used it successfully for source control and document control.

<t>(I'm in the UK, so my comments refer to our version of the show!) There is a human factor in the offers made by the banker. I'm sure a fixed, fairly simple algorithm is used to produce an initial number, but then the production team are able to alter the amount as they see fit. Perhaps they want ...

<t>The Herb Sutter books that Dominic's mentioned are well worth a look, along with the Scott Meyers "Effective C++", "More Effective C++" and "Effective STL" ones.There are two great reasons to read these books. One: they contain a wealth of information, real problems that you'll come across, real ...

<t>A completely different non-mathematical answer : if the magician can ensure that the coin is held by the participant for a few seconds, then it will warm up through body heat.So upon his return, all the magician need do is locate a warm coin. It's quite a noticeable effect, and it's how most coin...

They use Windows Forms "PropertyGrid" class - see MSDN here. The tree on the left of the properties dialog is just a standard TreeView control.Hope that helps,Sam