People sometimes email asking if a solution set is available for the exercises in ARM. The answer, unfortunately, is no. Many years ago, I wrote up 50 solutions for BDA and it was a lot of work–really, it was like writing a small book in itself. The trouble is that, once I started writing them up, I wanted to do it right, to set a good example. That’s a lot more effort than simply scrawling down some quick answers.