Python challenge is interesting too, but not a good intro to the language. http://www.pythonchallenge.com/ http://www.pythonchallenge.com/ upon a cursory look

Python challenge is interesting too, but not a good intro to the language. http://www.pythonchallenge.com/ http://www.pythonchallenge.com/ upon a cursory look I couldn't find a decent version for ruby, but there are many out there that do it differently.