Instruction

The Xpand section is a practice section. It is created with an objective of expanding your knowledge through practice. While attempting a question, you have three chances of working out the right answer. With each attempt the system will inform you whether you are right or wrong, and you can either attempt again, or check out the solution. If you check out the solution you will not be able to try again until you restart the practice chapter.

Some other pointers:

1. There is no time limit in this section. You can choose to spend as much time as you want per question
2. When you are done practicing a section, you can end the practice. When you want to practice the chapter again, either you can Resume the practice from where you had left off, or restart from the beginning.
3. You can attempt the questions as many times as you want by Restarting practice
4. You can also use the filters on the top right corner, to only practice incorrect or skipped questions. Explore that area for getting an idea .