In the given Venn diagram, the Triangle represents people who like Orange juice, the Circle represents people who like Avocado juice, and the Rectangle represents people who like Lime juice. Find the number of people who like only Lime juice.

To find the number of people who like only Lime juice, we need to look for the region that lies exclusively within the geometric shape representing Lime juice, without overlapping with any other shapes.
According to the question:

* Triangle = People who like Orange juice
* Circle = People who like Avocado juice
* Rectangle = People who like Lime juice

Therefore, "only Lime juice" corresponds to the region inside the Rectangle that is completely outside both the Triangle and the Circle.

Looking at the given Venn diagram, the number in that exclusive region of the rectangle is $6$.