From: b1_ __ <lists@...>
Date: 2012-05-01T16:05:31+09:00
Subject: Re: For beginners: Rubeque.com, interactive Ruby coding practice

And there's Ruby Quiz, of course.

http://www.rubyquiz.com/

Some difficult ones, but some reasonably easy ones, such as problem 14, 
digital number display.

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