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Solutions
The one who uses Lacoste live on an even numbered floor but above floor 4. Three people live between the one who uses Lacoste and Larry.
There will be two possible cases for the one who uses Lacoste (6,8). But if we put this person at floor 6, there will be no place for Larry. So we shall place him at floor 8.
Andy lives either on the topmost floor or on the bottom most floor. So we shall take two cases, in I Andy will sit at floor 8 and in another it will sit at floor 1.
Four people live between the one who uses Gucci and Venissa. Venissa does not live on even numbered floor. The person who uses Gucci lives between the one who uses Dior and Mona.
In Case I, Venissa can sit at either 1 or 7. In Case II, Venissa can sit at 7. So we have three possible cases.
Angelina uses Este Lauder. She lives above Cyndie and below Venissa.
Case I can be eliminated as there is no place below Venissa. Now we shall consider Case II and Case III.
The one who uses Este Lauder, lives two floors below the one who uses Guess. The one who uses Chanel lives between Angelina and Cyndie. Angelina uses Este Lauder. She lives above Cyndie and below Venissa.
The person who uses Gucci lives between the one who uses Dior and Mona.
In Case III, no possible seating arrangement is there. So it will be eliminated.
Case II is the correct one.
This is the final arrangement.