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Euler is more like math problems that can be solved with programming than programming challenges. Very neat, but decreasingly useful for programming practice past the first 20ish.

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I always ask for the easier Project Euler tests (or give them a couple) to do; the reason they are good test (IMO) is that they are too small a task to leverage frameworks and can demonstrate things like good approaches to engineering and programming practice (even if the questions are mathematical)

It is possible to demonstrate good approaches to engineering with your solution. But if you're cranking out PE problems, you really are better off just throwing out a bunch of one-off unmaintainable scripts. It is a good test of math and cleverness. It is not a good exercise for maintainable software.

See http://bentilly.blogspot.com/2010/01/solving-project-euler-p... as evidence that I am not just talking out of my ass about PE.

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