Five persons- Arun, Bali, Karan, Pal and Sid live in a five-storeyed building.
The bottommost floor is numbered as 1 while the topmost floor is numbered as 5. Sid lives immediately above Arun.
Two persons live between Sid and Bali.
| Case 1 | Case 2 | Case 3 |
| Floor | Persons | Persons | Persons |
| 5 | Sid | | Bali |
| 4 | Arun | Sid | |
| 3 | | Arun | |
| 2 | Bali | | Sid |
| 1 | | Bali | Arun |
Pal lives below Arun. Thus, case 3 is invalid.
| Case 1 | Case 2 |
| Floor | Persons | Persons |
| 5 | Sid | Karan |
| 4 | Arun | Sid |
| 3 | Pal/Karan | Arun |
| 2 | Bali | Pal |
| 1 | Pal/Karan | Bali |
Thus, the person who lives immediately below Karan is not known.
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