Renée, Julie and Gisèle have a room at Bally's, Ceasar's Palace and Mandalay Bay in Las Vegas.
They sleep in room number 205, 319 and 438.

Hints :  - The Mandalay Bay client leaves her room, 319, to go to the casino.
              - One hour later, she meets Julie who is staying at Bally's.
              - During this time, Gisèle is watching television in her room, 438.

Question : What is the hotel and room number of each woman?

See answer