Question 1
6 people (Eva, Ryan, Peyton, David, Odin, Alex) live on floors 1 to 6, one person per floor.
Based on these clues:
• Ryan lives immediately below David
• Peyton's floor number is congruent to 2 modulo 3
• Eva lives on an odd-numbered floor
• Odin lives exactly 1 floor above David
• Peyton's floor number is congruent to 1 modulo 2
On which floor does Odin live?
The unique arrangement (floor: person) is: {1: 'Eva', 2: 'Ryan', 3: 'David', 4: 'Odin', 5: 'Peyton', 6: 'Alex'}.