Learn Binary by Playing a Game
This is a nice game that helps you to learn binary numbers.
If on the right there is a decimal number, you must build the same number on the left by using binary digits.
If on the right there’s no number, you must click there and type the decimal number for the left binary number.
To help you make use of correspondence between binary and decimal with decimal numbers assigned to each binary column (you can see those numbers at the bottom of the board game).