Hexadecimal to decimal and vice versa...

Yesterday, some of my students tried out the computer quiz that I uploaded through my January 31 post. They said question number 7 was the toughest.

To work out the conversions from hex to dec (or vice versa), you may use the following method if you don't have a scientific calculator:

1. Open your computer's calculator.
2. Go to "View" and click on "Scientific".
3. Click on "Hex" and type the hexadecimal number and then click on "Dec" to get the decimal equivalent.







Let's say you want to find the decimal equivalent of the hexadecimal number A9. Can you figure out the answer?