Four persons are painting a house. M is painting the

Solution

Initial positions: M → Front of the house R → Back of the house J → North side S → South side Step 1: M switches with J M moves to the North J moves to the Front Now positions are: M → North J → Front R → Back S → South Step 2: J (now at the Front) switches with S (at the South) J moves to the South S moves to the Front Final positions: M → North R → Back J → South S → Front Final Answer: Front S is now at the front of the house.