Conor McIntyre, Sara McLean and Luke Scrase won three of the challenges while locked in the White Room, meaning that they earned a prize of fish pie and ice cream.
The White Room team won the Space Race task, which involved filling a tube with milk, while tied up in a harness.
Sara also triumphed for the White Room team in the Hammer Slammer memory challenge, which involved avoiding blue-paint filled cups.
The Main House triumphed in a White Form task, which involved guessing the identity of housemates from details on their show application forms.
Big Brother continues daily on Channel 5.
