diff --git a/lectures/05_classes_II/README.md b/lectures/05_classes_II/README.md
index 83859bb..86aeb55 100644
--- a/lectures/05_classes_II/README.md
+++ b/lectures/05_classes_II/README.md
@@ -39,7 +39,7 @@ will sort Date objects into chronological order.
 
 ## 5.3 Questions
 
-- Can you solve leetcode problem 905 with an overloaded operator <?
+- Can you solve leetcode problem 905 with an overloaded operator <, and make this overloaded operator < a non-member function?
 - Can you solve leetcode problem 905 with an overloaded operator <, and make this overloaded operator < a member function?
 - Can you solve leetcode problem 905 with an overloaded operator <, and make this overloaded operator < a member function, plus make the definition of this member function outside of the class definition?