GENERAL KNOWLEDGE: Who was the wizard who assisted Arthur in the legends?

Questions

How many rows of sprocket holes are there on a 36 exposure roll of Fuji 200 ASA film?

What size of boot is thrown in a welly throwing competition?

Which Middle eastern city is the home of the Evil Council?

Who were the first rock band to play 4 consecutive nights at Wembley Stadium?

What was Rex Hunt that brought him worldwide headlines in 1982?