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We offer each of our mathematics problems in two formats:

• HTML (HyperText Markup Language). You can see these documents directly in your Web browser. (They are "plain" Web documents.) Please note! At the present time, only a few problems are available in HTML format. Eventually, all problems will be available in HTML.

• PDF (Portable Document Format). PDF documents display and print mathematics more crisply than HTML documents, and they include pagination. If you want to create handouts, use the Printable (PDF) Version of our documents.
  
  You may not be able to see PDF documents in your Web browser. To see PDF documents, you must have previously installed Adobe Acrobat Reader software on your computer. Installing and using Adobe Acrobat Reader is relatively easy. In fact, many new computers come with Adobe Acrobat Reader already installed. If your computer doesn’t already include Adobe Acrobat Reader, you can find a free copy of it, along with instructions for download and installation, at the following Adobe Web sites.
  Macintosh users: http://www.adobe.com/support/downloads/acrmac.htm
  Windows users: http://www.adobe.com/support/downloads/acrwin.htm
  
  

Important! Each Web browser handles PDF documents differently. In specific, the way that you move between PDF and other Web pages can vary. Please read the instructions below to determine how you’ll manage PDFs in your browser.

• Most Web browsers open PDFs directly; that is, they use the same window for the PDF as they do for other Web pages. You can move from the PDF to another Web page by clicking the browser’s Back button.

• Some browsers open PDFs in a new window. You can move from the PDF to another Web page by closing the new PDF window.

• Some browsers download the PDF to your computer. In that case you must locate the PDF on your hard drive and double-click to view the PDF. You can move from the PDF to another Web page by closing the PDF window.