Most of these are guesses I'm afraid
Spoiler:
Question 1 - What's 200 + 200 + 200?
600
Question 2 - What Channel does TV Series The Walking Dead air on in the US?
AMC
Question 3 - Which TV Show starred Bradley Walsh, Jamie Bamber, Freema Agyeman, and Ben Daniels?
No Idea, Coronation Street?
Question 4 - Is Nepal a landlocked country True or False?
True
Question 5 - Who played Aang in the Film The Last Airbender?
No idea
Question 6 - In which year did King Henry V die?
uuhhh I'm not British so this is going to be waaaay off 1765 :P
Question 7 - What's 20 x 5 x 5 x 9 x 4?
18000
Question 8 - The word Baka in Japanese means what word in English?
Rice? 
Question 9 - Who won the TV Series The X Factor in 2010?
Matt Cardle?
Question 10 - In which Australian State is The Great Barrier Reef located?
Sydney?