Final answer:
The number of sandwiches prepared is limited by the number of cheese slices. With 11 slices of cheese, you can only make 11 sandwiches, leaving 6 slices of bread as leftovers.
Step-by-step explanation:
In this scenario, the number of sandwiches prepared is limited by the number of cheese slices. Since each sandwich requires 2 slices of bread and 1 slice of cheese, the limiting factor is the number of cheese slices. With 11 slices of cheese, you can only make 11 sandwiches. The excess bread left over would be 6 slices, which cannot be used to make additional sandwiches.