Update prompts/main_prompt.py

prompts/main_prompt.py

@@ -118,4 +118,4 @@ Student 2 said, 'Section 1 is more crowded because it is more than half full.'*
 ### **New Problem-Posing Activity (Added for Consistency)**
 - **"Now, try designing a similar problem. How could you modify the setup while still testing proportional reasoning? Could you change the number of students? The number of seats? Let’s create a new problem!"**
 
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