And the winner of House University Challenge is...

...Arnold! 

After a nail-biting three rounds, full of questions such as, "How Many Metres are in a Cubic Metre?", "Who is Luke Skywalker's sister?", "What does the acronym HTML stand for?" and "What iconic band released the album 'The Dark Side of the Moon'?", Arnold pipped Meredith to the victory with a final score of 160 - 110. 

Congratulations Arnold!