What am I

Question: what does 1+1=.

Question: If there's a pound of lead and feather, which is heavier?

Question: A horse jumps over a castle and lands on a man, then the man disappears. How was this possible?

Question: During what month do people sleep the least?

Question: You come across a Native American tribe and the leader wants to kill. He tells you, you can say your final words. If you tell the truth you will be burned at the stake. If you lie he will shoot you. What do you say to ensure survival?

Question: When is 99 more than 100?