Good Riddles

Question: At school Joe has three friends: Tim, George and Paige. Two of them play football, two play tennis, and two play golf. The friend who doesn't play golf doesn't play tennis and the one who doesn't play football doesn't play golf. Which sports does each person play?

Question: Which is correct, 9 and 5 is 13 or 9 plus 5 is 13?

Question: Half of those who read this riddle, I am your best friend.
I depend on you, but it's you I will defend.

What am I?

Question: Snow White had the dwarfs were having dinner. The dwarfs asked for more food so snow white got them more.

How many seconds did she take?

Question: I make up all literature, but I'm often sealed.

What am I?