Question 1
4 people (Susan, Freya, Pooja, David) live in a building with floors 1 to 4. They recently moved between floors.
Based on these clues:
• Initially, Susan lived on floor 2
• Initially, Freya lived on floor 1
• Initially, Pooja lived on floor 4
• Initially, David lived on floor 3
• Susan did not move
• Freya moved 3 floors up
• Pooja moved 3 floors down
• David did not move
• Freya lives on floor 4
• David lives above Pooja
• There is exactly one floor between Pooja and David
After the moves, on which floor does Susan live?
The unique arrangement (floor: person) is: {1: 'Pooja', 2: 'Susan', 3: 'David', 4: 'Freya'}. Initial state: {'Freya': 1, 'Susan': 2, 'David': 3, 'Pooja': 4}.