Description
This applet allows you to interactively construct binary, octal and hexadecimal values. It also displays the decimal equivalent as numbers are formed.

• Binary: Displays a form for creating binary numbers. The light blue coloured squares are clickable fields. For each bit position select either 0 or 1 from the list using left mouse clicks
• Octal: Displays a form for creating octal numbers. The light blue coloured squares are clickable fields. For each digit position select numbers 0-7 shown above that position, using left mouse clicks.
• Octal: Displays a form for creating hexadecimal numbers. The light blue coloured squares are clickable fields. For each digit position select numbers 0-9,A-F shown above that position, using left mouse clicks.
• Random Number: Generates and displays a random number. You can use this number as the target decimal number, and try to match its value.

Procedure for converting between binary and decimal representations: Note (pdf)