An Item set is a group of digits that make up a number. The number may be a zip-code consisting of the standard five digits, or it could be an area-code consisting of three digits. If you are preparing for a situation that you know uses item sets of a specified length you may want to practice by setting the number of digits included in that set. Select the number from the list below and click "OK."
By selecting this option a bubble as shown below will appear to instantly reinforce your response. By selecting "Sliding" that bubble will retreat as you continue, and return when you complete another item set. By selecting "Static" the bubble will remain visible throughout the lesson.