6. Topology of the Real Line

Open And Closed Sets — Quiz

Test your understanding of open and closed sets with 5 practice questions.

Practice Questions

Question 1

Which set is open in $\mathbb{R}$?

Question 2

Which set is closed in $\mathbb{R}$?

Question 3

Which set is open but not closed in $\mathbb{R}$?

Question 4

Which set is closed but not open in $\mathbb{R}$?

Question 5

Which set is neither open nor closed in $\mathbb{R}$?