diff --git a/episodes/ai-overview.md b/episodes/ai-overview.md
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@@ -18,6 +18,14 @@ exercises: 15 # exercise time in minutes
 
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+::::::::::::::::::::::::::::::::::::: challenge
+
+## Which of these describe an AI agent accurately?
+  1. Brain, Perception, Memory, and Action
+  2. AI agents operate independently, making their own rules and pursuing their own goals
+  3. AI agents are software systems designed to perform tasks with substantial human oversight.
+
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 ::::::::::::::::::::::::::::::::::::: keypoints