Rama Need help with Hexadecimal and Octal mathematics?... If you're using Windows, try using the Window's calculator (usually under your Accessories Group) in scientific mode. Select either HEX or OCT, and enter the numbers as per usual. You can then enter the result into the puzzle. If you have a Windows 95 Keyboard, you can jump back and forth from the calculator and the game by pressing the "Window Start" key. Of course, you can always just work it out on paper or use a regular calculator. Don't forget, in the hexadecimal system, A=10, B=11, C=12....F=15. - o -