The mod 3 clock allows you to determine the remainder if you divide a given number by 3. Click on the [b]button[/b] to create a new problem. Drag the [color=#1551b5][b]blue slider[/b][/color] in order to move the hand of the mod 3 clock. When the value of the [color=#1551b5][b]blue slider[/b][/color] matches the given number, the hand of the clock points at the corresponding [color=#c51414][b]remainder[/b][/color] for division by 3.